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Sustainability and LEED®

®

How does ISOLGOMMA contribute towards eco-sustainability?

The materials used in construction are increasingly required to fulfil eco-sustainable requirements in order to minimise the environmental impact.

Isolgomma has always been at the forefront in the use of regenerated and recycled materials selected through rigorous processes: indeed, our raw materials are made up of recycled materials for at least 92%. These materials guarantee solutions with limited environmental impact and promote sustainable development, while preserving the natural environment and the quality of life.

Isolgomma implements environmental management systems as set forth in the UNI EN ISO 14001 standard, in addition to safety systems as set forth in the OHSAS 18001 standard.

Our environmental policy does not only target the product, but involves the entire production process through a detailed LCA (Life Cycle Assessment).

LCA is a method used for assessing the potential environmental impact of a product from its creation to the end of its service life.

Careful attention to raw material procurement, processing, limitation of emissions in the environment, packaging, distribution, and the use and disposal of reject material are all designed to limit the use of resources and pollutants.



What is LEED®?

LEED® is a system for certifying the sustainability of buildings that takes into account their energy efficiency, water efficiency, the site on which the building is constructed, the materials and resources used for its construction and the quality of indoor environments with regard to air quality and thermal comfort. It is therefore important to be able to prove and explain that the products making up the structure and the building's outfitting conform to the standard's criteria and/or their potential contributions in fulfilling said requirements.

The LEED® building certification was introduced in the United States in 1993 by the US Green Building Council, a non-profit association that brought about deep changes in the building sector: in September 2009, it had over 15,700 partners worldwide and the LEED® certification was widely used in over 40 countries throughout the world. This system allows for certifying the environmental and economic sustainability of buildings, by promoting their design, construction site preparation, daily management, materials used and the energy performances.

LEED® identifies specific measurable requirements – including consumption of environmental resources, energy consumption and the quality of the indoor environment – which define the eco-compatibility levels of buildings. Within this system, the corporate world assumes a leading role in promoting sustainable living conditions, comfort and the quality of life.

Furthermore, LEED® is a flexible system structured into 5 different protocols:

  • LEED® 2009 NEW CONSTRUCTION AND MAJOR RENOVATIONS (Building Design & Construction – Schools – Core & Shell) - released in April 2010 and aimed at buildings for retail, institutional and residential use with over four habitable floors.
  • LEED® FOR SCHOOLS – designed for certifying the quality and environmental sustainability of school buildings.
  • GBC HOME – a tool for designing and constructing buildings for residential use, single family units, townhouses, small-scale apartment blocks and mixed-use buildings mainly used for residential purposes.
  • LEED® FOR EXISTING BUILDINGS (EBOM - Existing Buildings Operation & Maintenance) – a tool aimed at the various types of existing buildings considered in LEED 2009 New Construction and Major Renovations, it involves all management and use operations for existing buildings that have been occupied by at least 12 months.
  • GBC NEIGHBORHOOD DEVELOPMENT (ND - Neighborhood) – a tool for designing and planning urban areas that are new or that need to be revitalised. Buildings, infrastructures, roads and open spaces, therefore, are just some of the elements taken into account by the protocol.

The competitive advantages for subjects adopting LEED standards – be they professionals or companies – mostly revolve around the high final quality of the product, the significant savings on management costs that these buildings guarantee when compared to traditional buildings, and the certification on the part of a third party.

Which are the certification levels?

Each protocol is structured into various sections based on prerequisites and credits. The prerequisites of each thematic area must necessarily be fulfilled in order for the building to obtain the certification. The credits can be chosen in relation to the project's characteristics.

The LEED® 2009 ITALY NEW CONSTRUCTION AND MAJOR RENOVATIONS protocol, similarly to the LEED® FOR SCHOOLS, GBC HOME and LEED® FOR EXISTING BUILDINGS protocols, is subdivided into 7 different thematic areas:

LEED® certification thematic areas

Each thematic area is structured into prerequisites, central credits and innovation credits.

The LEED certification is issued to the building and not to single products.. The products play a crucial role in determining the final rating assigned to the building, as they help to attain more LEED® credits.

To obtain the certification, it is compulsory to fulfil all the prerequisites and part of the credits: the overall rating thus obtained can allow for attaining the desired LEED® certification level. The total sum of all the credit scores determines the building's certification level. A valid rating ranges between 40 and 110 points and allows for obtaining a Certified, Silver, Gold or Platinum certification.

LEED® certification
What is the LEED® standard products Mapping?

"Product mapping" is the expression used to define the analysis of single products of a company in terms of their energy and environmental sustainability with respect to the LEED® standard. It practically consists in a verification – carried out by a third party – aimed at demonstrating that the single product conforms to one or more of the LEED® requirements and credits. Each company that is interested in being competitive on a market in which LEED® maps its products must gradually adopt a production system geared towards sustainability and energy saving issues.

LEED® certification Isolgomma provides – for each product range – the relevant degree of contribution to LEED® credits in its status of ordinary partner of GBC Italia. Indeed, the company has always been attentive to the construction sector's impact on the surrounding environment, and to the serious repercussions its buildings can have on the well-being of the people inhabiting them.







LEED® CREDITS REFERENCE GUIDE FOR ISOLGOMMA PRODUCTS


ENERGY & ATMOSPHERE (EA)
Minimum energy performance
EA Prerequisite 1
Optimisation of energy performance
EA Credit 1
Minimum energy performance and opaque envelope energy performance
EA Prerequisite 2
Advanced performance of the opaque envelope
EA Credit 2
MATERIALS & RESOURCES (MR)
Management of construction waste
MR Prerequisite 2
Management of construction waste
MR Credit 2
Contents of the recycled material

MR Credit 4
Materials that are extracted, processed and produced at a limited distance
MR Credit 5
INDOOR ENVIRONMENTAL QUALITY (QI)
Acoustics
QI Credit 11
Only for LEED® FOR SCHOOLS
Minimum acoustic performance
IEQ Prerequisite 3
Advanced acoustic performance
IEQ Credit 9

The complete documentation (mapping) relative to the LEED environmental sustainability certification can be downloaded here (PDF file attached): it contains all the information concerning the classification of ISOLGOMMA products with reference to the protocols.

ISOLGOMMA PRODUCTS AND THE CERTIFICATION LEED® - download table BROCHURE ABOUT SUSTAINABILITY & LEED® - download book MAPPING REPORT OF ISOLGOMMA PRODUCTS - download pdf

How can the LEED® certification be obtained?

It is important to familiarise with the entire process for obtaining the certification of an eco-sustainable building. This is especially important for the subject developing the project, but also for future purchasers, so that they may know the actual costs involved with the certification level achieved and for which the building was purchased.

All that is required is to observe the instructions issued by the Green Building Council.

Step 1: Online registration with GBCItalia.org
The first step is to register online the building to be certified. To this aim, the GBC website contains a specific page where the user may enter the project's title, the building's location, the scheduled start and end dates of the works and the surface area occupied, and the expected certification level.

Step 2: Preparation of the documentation
Each LEED credit/prerequisite is associated with a single request for documents that must be carefully drawn up as part of the registration process. Once the required documentation has been collected, a formal request must be submitted through the Green Building Italia website; the project manager may then directly upload on the Green Building Italia server the relevant material justifying the LEED® credits, so as to initiate their examination procedure.

Step 3: Submission of the documentation
Prior to obtaining the certification, the project manager must submit the complete documentation demonstrating the fulfilment of all the prerequisites and at least the minimum number of credits required for obtaining the certification, in addition to the general information forms duly completed. Once the application has been completed, it will be subjected to a further formal examination.

Step 4: Revision of the documentation
The verification process varies slightly among the various LEED® standards. Once the application has been examined, the draughtsman can either accept the final decision or oppose it.

Step 5: Certification
All approved LEED® projects will receive a formal identification certificate.

LEED® certification
Why should you purchase/build a LEED®-certified home?

A LEED®-certified building differs from every other building for the fact that is has healthier spaces in which to live and work, for enabling energy saving through the optimisation of resources used and for guaranteeing a reduced environmental impact.
There are several advantages in purchasing a home designed according to LEED® standards, starting from aspects related to personal health. Indeed, we normally dwell in closed buildings – be they our homes, offices or work environments – for 90% of the time, and we often fail to notice just how much more polluted and dangerous these environments can be compared to outdoor spaces. The fault lies with the construction materials used for buildings and the products decorating or contained in these, which are often made with hazardous or toxic substances and created without taking into account the health of people coming into contact with them: in fact, many of these materials can release large quantities of chemical substances which are then inhaled continuously and unknowingly.

A LEED®-certified home is instead designed with the chief priority of safeguarding the health of its inhabitants. The air quality is better than that of other homes, and this aspect is particularly appreciated by all purchasers sensitive to these issues. Healthier closed spaces safeguard human health and contribute to improving the quality of life.

In a LEED® home, the materials used must be entirely or partly recycled, natural or regenerable. The optimisation of surfaces with windows, for increasing the amount of light naturally using sources coming from outside; the use of heat-insulating construction materials, which reduce heat dispersion and thus the need for heating or air conditioning the indoor environment. In a LEED® home, less energy is required for heating, air conditioning and illumination purposes: overall, a well-designed building can consume between 30% and 80% less energy compared to a traditional building!.

A LEED®-certified home, therefore, benefits purchasers and construction companies alike, as the latter may improve their image in the eyes of potential purchasers, by proving to them that the newly constructed or renovated building complies with stringent and verifiable ecological standards, certified by an independent and recognised third party. A LEED®-certified building has an added value and is therefore more attractive commercially; this aspect may indeed justify a reasonable increase in its economic value.

LEED® certification
ENERGY & ATMOSPHERE (EA)

Minimum energy performance
EA Prerequisite 1 (compulsory)

Reference standard:
- LEED® GBC HOME

Aim
To achieve a minimum overall energy performance level of the building with respect to a reference standard.

Requirements
Two distinct options are proposed for attaining this prerequisite.

OPTION 1: Simplified procedure
It consists in attaining a building energy performance value incorporating primary energy requirements for winter and summer climate control, for producing domestic hot water, for illuminating and for process uses that is at least 10% lower than the energy performance of a reference building.
The energy performance of the building considered, and of the reference building, must incorporate the contribution of systems for energy production from renewable sources.

OPTION 2: Thermo-energetic simulation under dynamic conditions
It consists in demonstrating a percentage improvement in the energy performance index of the proposed building with respect to the estimated primary energy consumption of the reference building. The reference building's energy performance must be estimated by constructing a reference model. The assessment must be conducted by means of a numerical simulation model applied to the entire building. The ratio between the energy performance of the proposed building and that of the reference building must be greater than or equal to 10%.

Products of the Upgrei, Fybro, Natur, Mineral, Sylencer, Biwall, Trywall and Rewall ranges have thermal insulation characteristics and fulfil the requirements of the UNI EN 12667 reference standard, which specifies the testing principles and procedures for determining thermal resistance on samples having a thermal resistance not inferior to 0.5 m2 K/W.

ENERGY & ATMOSPHERE (EA)

Optimisation of energy performance
EA Credit 1

Reference standard: (from 1 to 19 points)
- LEED® 2009 FOR NEW CONSTRUCTION AND MAJOR RENOVATIONS
- LEED® FOR EXISTING BUILDINGS
- LEED® FOR SCHOOLS

Reference standard+A59: (from 1 to 27 points)
- LEED® GBC HOME

Aim
To attain increasingly high energy performance levels for the proposed buildings and systems that exceed the minimum values specified in the standard, in order to reduce the economic and environmental impact associated with excessive energy consumption.

Requirements
The draughtsmen who document the attainment of Credit 1 automatically satisfy the EA2 prerequisite as well. Two distinct options are proposed for the attainment of Credit EAc1, but the maximum obtainable score is different.

OPTION 1: SIMPLIFIED PROCEDURE FOR DETERMINING THE BUILDING'S ENERGY PERFORMANCE (1 – 3 points)
It consists in demonstrating a percentage improvement in the building's energy performance with respect to the standard reference values indicated below.
For the purpose of this calculation, the building's energy performance refers to the overall primary energy requirements for winter and summer climate control, for the production of domestic hot water, for powering illumination systems and for process power requirements.
The score limits with the relative minimum percentages of saved energy are listed in the following table:

New building Existing buildings Points
10% 5% prerequisito
15% 10% 1
20% 15% 2
> 25% > 20% 3

To obtain points for this credit through this option, the project must nonetheless satisfy – in addition to that specified above – the compulsory provisions of Prerequisite 2, namely the compulsory provisions of the ASHRAE 90.1-2007 standard (taking into account printing errors but not additions), appropriately modified for adaptation to the Italian context (Sections 5.4 and 6.4 for ventilation and air conditioning systems alone, and Sections 8.4, 9.4 and 10.4), and the provisions contained in (Italian) Legislative Decree 192/2005 (as amended and integrated by Legislative Decree 311/2006, Presidential Decree 59/09 and any other more recent national law in force at the time of the project's registration with LEED).

OPTION 2: ENERGY SIMULATION OF THE ENTIRE BUILDING UNDER DYNAMIC CONDITIONS (1 – 19 points) or (1 – 27 points)
It consists in demonstrating a percentage improvement in the energy performance index of the proposed building with respect to the estimated primary energy consumption of the reference building. The reference building's consumption must be estimated in accordance with the Building Performance Rating Method indicated in Annex G of the ANSI/ASHRAE 90.1-2007 standard, through a numerical simulation of the entire building.

Products of the Upgrei, Fybro, Natur, Mineral, Sylencer, Biwall, Trywall and Rewall ranges have thermal insulation characteristics and fulfil the requirements of the UNI EN 12667 reference standard, which specifies the testing principles and procedures for determining the thermal resistance on samples having a thermal resistance not inferior to 0.5 m2 K/W.

ENERGY & ATMOSPHERE (EA)

Minimum energy performance and opaque envelope energy performance
EA Prerequisite 2 (compulsory)

Standard di riferimento:
- LEED® 2009 FOR NEW CONSTRUCTION AND MAJOR RENOVATIONS
- LEED® FOR EXISTING BUILDINGS
- LEED® FOR SCHOOLS
- LEED® GBC HOME

Aim
To define a minimum energy efficiency level for the proposed buildings and systems, in order to reduce the economic and environmental impact stemming from excessive energy consumption; for the LEED® GBC HOME standard, the aim is to achieve a minimum performance level for dispersive components of the opaque envelope.

Requirements
Two distinct options are proposed for attaining this prerequisite. In both cases, the proposed building must nonetheless comply with the following compulsory minimum provisions and must satisfy: the compulsory provisions (Sections 5.4 and 6.4 for ventilation and air conditioning systems, Sections 8.4, 9.4 and 10.4) of the ASHRAE/IESNA 90.1-2007 standard (taking into account the Errata but not the Addenda); the limit values for transmittance, the minimum average overall seasonal performance, the limit values of annual energy consumption for heating and cooling and the production of domestic hot water, as set forth in Legislative Decree 192/2005 (as amended and integrated by Legislative Decree 311/2006, Presidential Decree 59/09 any other more recent national law in force at the time of the project's registration with LEED®) or in more stringent local regulations.
In both the calculation options that follow, it is necessary to demonstrate a minimum percentage improvement of the building's energy performance, equal to 10% for new buildings and 5% for major renovations, by calculating the energy performance of the relevant building with respect to the standard reference values indicated by the chosen calculation option.

OPTION 1: SIMPLIFIED PROCEDURE FOR DETERMINING THE BUILDING'S ENERGY PERFORMANCE
For the purpose of this calculation, the building's energy performance refers to the overall primary energy needs for winter and summer climate control, for producing domestic hot water, for powering illumination systems and for process power requirements.

OPTION 2: ENERGY SIMULATION OF THE ENTIRE BUILDING UNDER DYNAMIC CONDITIONS
The aim is to demonstrate the percentage improvement of the proposed building's energy performance, with respect to the estimated primary energy consumption of the reference building, equal to 10% for new buildings and 5% for major renovations.

Products of the Upgrei, Fybro, Natur, Mineral, Sylencer, Biwall, Trywall and Rewall ranges have thermal insulation characteristics and fulfil the requirements of the UNI EN 12667 reference standard, which specifies the testing principles and procedures for determining the thermal resistance on samples having a thermal resistance not inferior to 0.5 m2 K/W.

ENERGY & ATMOSPHERE (EA)

Advanced performance of the opaque envelope
EA Credit 2 (2 points)

Standard di riferimento:
- LEED® GBC HOME

Aim
To obtain improved thermophysical performance levels for the opaque envelope components compared to the prerequisite.

Requirements
It is necessary to attain the transmittance levels listed in the tables below.
The thermal transmittance (U) values of the opaque components are grouped according to the climate zones (Table 1 and Table 2).

Table 1: thermal transmittance values for newly constructed buildings

Climate zone Opaque structures Vertical opaque structures
Ceilings Floors
A 0,34 0,59 0,56
B 0,34 0,44 0,43
C 0,34 0,38 0,36
D 0,29 0,32 0,32
E 0,27 0,30 0,31
F 0,26 0,29 0,30

Table 2: thermal transmittance values for existing buildings

Climate zone Opaque structures Vertical opaque structures
Ceilings Floors
A 0,32 0,55 0,53
B 0,32 0,42 0,41
C 0,32 0,36 0,34
D 0,27 0,31 0,31
E 0,26 0,28 0,29
F 0,25 0,27 0,28

The carrying out of the thermal bridge check is verified in EA Prerequisite 2. In the event of external insulation systems, certified solutions are required in accordance to the provisions of the ETAG 04 technical guidelines.
A project aimed at attaining this credit must necessarily observe the guidelines and also compulsorily satisfy EA Prerequisites 2, 3, 4 and 5.

Products of the Upgrei, Fybro, Natur, Mineral, Sylencer, Biwall, Trywall and Rewall ranges have thermal insulation characteristics and fulfil the requirements of the UNI EN 12667 reference standard, which specifies the testing principles and procedures for determining the thermal resistance on samples having a thermal resistance not inferior to 0.5 m2 K/W.

MATERIALS & RESOURCES (MR)

Management of construction waste
MR Prerequisite 2 (compulsory)

Reference standard:
- LEED® GBC HOME

Aim
To ensure that waste deriving from construction and demolition activities is not transferred to waste dumps.

Requirements
The construction company must recycle and/or recover non-hazardous waste deriving from construction and demolition activities and draft a Construction Waste Management Plan containing the list of materials excluded from transferral to the waste dump, which must also specify which of the following options was adopted on the site:

OPTION 1: Waste separated on-site
Demolition and construction waste materials are adequately separated on-site before being collected by an authorised and accredited company, which then stores the separated waste and recycles it directly and/or transfers it to third parties.

OPTION 2: Waste separated away from site
Demolition and construction waste materials are not separated on-site but are collected in an undifferentiated manner by one or more authorised and accredited companies, which transfer them to an authorised and adequately equipped site where – on behalf of the company – they are then separated and stored separately. Whereas the waste separation phase occurs in each distinct site, the separated storage phase groups separated waste of various origin and/or sites. After the separation and storage phases, the company performing the service recycles the waste within its premises and/or transfers the separated waste to third parties.
For this prerequisite, the minimum percentage limit for waste to be recycled or recovered is equal to 30% by weight or volume; the same unit of measurement applies to all calculations.

MATERIALS & RESOURCES (MR)

Management of construction waste
MR Credit 2 (from 1 to 2 points)

Reference standard:
- LEED® 2009 FOR NEW CONSTRUCTION AND MAJOR RENOVATIONS
- LEED® FOR EXISTING BUILDINGS
- LEED® FOR SCHOOLS
- LEED® GBC HOME

Aim
To direct waste generated from demolition and construction activities (site activities) towards recovery and recycling facilities, rather than to waste dumps or incinerators.

Requirements
To direct waste from waste dumps by recycling and/or recovering non-hazardous waste deriving from construction and demolition activities. The company must draft a site waste management plan identifying the materials not to be transferred to the waste dump, indicating whether or not these are accordingly separated on-site. Suppliers of materials and products must help the company to attain this credit by bringing on-site products with recyclable packaging.

For its packaging materials, ISOLGOMMA uses recyclable cardboard and PET. Isolgomma has drawn up a self-declaration, on headed paper, specifying that all materials it uses for packaging are recyclable, in order to help the construction company to fulfil the credit requirements.

MATERIALS & RESOURCES (MR)

Contents of the recycled material
MR Credit 4 (from 1 to 2 points)

Reference standard:
- LEED® 2009 FOR NEW CONSTRUCTION AND MAJOR RENOVATIONS
- LEED® FOR EXISTING BUILDINGS
- LEED® FOR SCHOOLS
- LEED® GBC HOME

Aim
To increase the demand for materials containing a fraction of recycled material, and to reduce the impact caused by the extraction and processing of virgin raw materials.

Requirements
To use for the building construction materials containing recycled materials, such that the sum of these post-consumer materials and half of the pre-consumer materials make up at least 10% based on the cost, or 20% of the total value of the materials used in the project.

CONTENT OF RECYCLED MATERIAL POINTS
10% 1
20% 2

The product ranges comprising raw materials with recycled content, which therefore contribute to fulfilling the credit requirements, are Roll, Grei, Upgrei, Syl and Sylpro, Sylcer, Sylwood, Mustwall, Fybro, Stywall, Stabe, Sylencer, Biwall, Trywall and Rewall..

MATERIALS & RESOURCES (MR)

Materials that are extracted, processed and produced at a limited distance (regional materials)
MR Credit 5 (from 1 to 2 points)

Standard di riferimento:
- LEED® 2009 FOR NEW CONSTRUCTION AND MAJOR RENOVATIONS
- LEED® FOR EXISTING BUILDINGS
- LEED® FOR SCHOOLS
- LEED® GBC HOME

Aim
To increase the demand for construction materials and products that have been extracted and processed in a regional context, thereby promoting the use of indigenous resources and reducing the environmental impact due to their transport.

Requirements
Certificazione LEED®
The use of construction materials and products that have been extracted, collected, recovered or processed within 500 miles (804.5 km) from the project site, for a minimum of 10% or 20% (based on the cost) of the total value of the materials.



MATERIALE REGIONALI PUNTI
10% 1
20% 2


LEED® Italia requires the use of construction materials and products that have been extracted, collected or recovered and processed within 350 km (in case of road transport); this radius increases to 1,050 km in case of rail or sea transport.

If only a fraction of the product/material was extracted, collected, recovered or processed locally, then only that percentage (in weight) contributes to the regional value. The percentages of material that fulfil Option 1 and Option 2 may vary, but their total sum must respectively reach 10% (based on the cost) to obtain 1 point or 20% (based on the cost) to obtain 2 points.

MATERIALE REGIONALI PUNTI
% (350km) + % (1050km) = 10% 1
% (350km) + % (1050km) = 20% 2

Example: 3% within a 350 km radius plus 7% within a 1,050 km radius with rail/sea transport amounts to 1 point; 12% within a 350 km radius plus 8% within a 1,050 km radius with rail/sea transport amounts to 2 points.

The actual contribution of this credit can only be determined by considering the specific project for which these products are used, as the distance is calculated from the location of the site receiving the materials. Isolgomma has drawn up a self-declaration specifying the place of extraction, processing and production of each raw material, so that the distance from the site can be calculated for the specific supply.

INDOOR ENVIRONMENTAL QUALITY (IEQ)

Minimum acoustic performance
IEQ Prerequisite 3 (compulsory)

Reference standard:
- LEED® FOR SCHOOLS

Aim
To design acoustically isolated classrooms in which teachers can speak freely to their students without keeping their voice down, and in which students can effectively communicate with each other and with the teacher.

Requirements
Designing classrooms and other study spaces that include equipment capable of guaranteeing sound absorption values conforming to the ANSI S12.60 - 2002 Standard. Obtaining a maximum disturbance level due to heating or air conditioning equipment in the rooms equal to 45 dB.

CASE 1: classrooms and study spaces < 20,000 cubic feet (560 cubic metres)
OPTION 1: The entire ceiling space (100%, excluding lights, grilles and diffusers) of all classrooms must be lined with a material having a noise reduction coefficient (NRC) of 0.70 or greater.
OPTION 2: confirm that the total area of acoustic panels, ceiling finishes and other acoustic absorption components is equal to or greater than the total ceiling area of the classrooms (excluding lights, diffusers and grilles). The materials must have a NRC value of 0.70 or greater for being included in the calculation.

CASE 2: classrooms and study spaces >= 20,000 cubic feet (560 cubic metres)
Confirm – through the calculations outlined in the ANSI S12.60 - 2002 Standard – that all classrooms and study spaces are designed in such a way that their reverberation time is 1.5 seconds or lower.

The products of the Roll, Grei, Upgrei, Syl and Sylpro, Sylcer, Slywood, Mustwall, Fybro, Natur, Mineral, Megamat, Stywall, Stabe, Sylencer, Biwall, Trywall and Rewall ranges – thanks to their high acoustic insulation values – favour sound absorption and mitigate the propagation of sound waves, thereby contributing to fulfilling the credit requirements.

INDOOR ENVIRONMENTAL QUALITY (IEQ)

Advanced acoustic performance
IEQ Credit 9 (1 point)

Reference standard:
- LEED® FOR SCHOOLS

Aim
To design acoustically isolated classrooms in which teachers can speak freely to their students without keeping their voice down, and in which students can effectively communicate with each other and with the teacher.

Requirements
SOUND TRANSMISSION: To design the building envelope, the partition walls of classrooms and other partitions within study spaces in a way that fulfils the requirements of the Sound Transmission Class (STC) of the ANSI S12.60 - 2002 Standard, Acoustical Performance Criteria, Design Requirements and Guidelines for Schools, excluding windows, which must have a STC value of at least 35.

BACKGROUND NOISE: to reduce background noise – caused by heating, ventilation and air conditioning systems in classrooms and other study environments – down to 40 dB or less.

The products of the Roll, Grei, Upgrei, Syl and Sylpro, Sylcer, Slywood, Mustwall, Fybro, Natur, Mineral, Megamat, Stywall, Stabe, Sylencer, Biwall, Trywall and Rewall ranges – thanks to their high acoustic insulation values – favour sound absorption and mitigate the propagation of sound waves, thereby contributing to fulfilling the credit requirements.

INDOOR ENVIRONMENTAL QUALITY (QI)

Acoustics
QI Credit 11 (2 points)

Reference standard:
- LEED® GBC HOME

Aim
To reduce the building's noise propagation from the outside environment and from other buildings, in particular:

Requirements
To attain – for all acoustic descriptors – the acoustic values pertaining to Class II, Table I, Page 9, of the UNI 11367/2010 standard. The verification of the attainment of the required values occurs through an experimental test once construction operations are completed.

The products of the Roll, Grei, Upgrei, Syl and Sylpro, Sylcer, Slywood, Mustwall, Fybro, Natur, Mineral, Megamat, Stywall, Sylencer, Biwall, Trywall and Rewall ranges help to fulfil the credit requirements as they favour sound absorption and mitigate the propagation of sound waves, thanks to their high acoustic isolation values. The single product sheets contain information on the acoustic characteristics, which helps the draughtsman to select the suitable type and thickness of the isolating material that satisfies the design requirements.