With 30 years of experience and a strong focus on sound, we are the leading brand in this type of flooring. With different types of dampening elements, we can achieve different sound properties depending on the type of subfloor.
The systems are type-approved by SP and with the laboratorys test results we can calculate what sound insulation you get in a building. Field measurements in completed buildings confirm that sound class B, and in some cases even sound class A, is met with Granab subfloor systems.
Example
(c/c distances are determined by room category and acoustic requirements)
Design of sylodyn pads
Do you have questions about acoustics?
Contact our experienced sales team to get answers to your acoustic questions.
Technical support
Granab works closely with a number of sound consultants in the construction industry to meet high sound requirements.
We help you with all technical support, calculation of natural frequency and optimisation of the system. We draw, cut, label, package and then deliver the system to you, completely according to your needs.
Sylodyn as dampening element:
Sylodyn is used as vibration and structure-borne sound insulation where requirements are very high.
The material is as soft dynamically as it is statically and is often the only solution for applications with high loads and requirements for low resonance frequencies.
Environment: Sylodyn has no environmental impact and is recyclable into new polyurethane product. Not affected by ozone, UV radiation or by commonly occurring chemicals.
Functional age resistance: Sylodyn has extremely long durability andthe material’s dynamic E-modules doesn’t show any long-term creep effect. The sylodyn’s short-term extreme overloads is very high and the material springs back entirely if overloaded.
Advantages: An efficient and economical material. Good vibration isolation is achieved even with little springing and at small amplitudes. Good structure-borne sound insulation even at high frequencies.
Three variants of sylodyn with different stiffness for different load cases.
Green – Sylodyn ND
Static load range up to approx. 300 kg/m²
Blue – Sylodyn NE
Static load range up to approx. 600 kg/m²
Purple – Sylodyn NF
Static load range up to approx. 750 kg/m²
Sound classification description in living areas according to SS 25267
Sound class A: The sound class corresponds to very good acoustic conditions.
Sound class B: The sound class corresponds to significantly better acoustic conditions than sound class C. This sound class should be applied when a good living environment is requested and is the most common class.
Sound class C: The sound class provides satisfactory acoustic conditions for a majority of residents and can be applied as a minimum requirement according to the Swedish Board of Building, Planning and Housing’s directives.
Remarks: The functional requirements in this standard are adapted to the respective sound classes on the basis of extensive practical experience of subjectively perceived acoustic environments in dwellings. It should be noted, however, that building constructions – for both practical and financial reasons – cannot be designed to entirely avoid audible sound from adjoining spaces from all types of activities. Audible sound can occur, for example, from jumping or substantial impact on a floor. This may even occur in buildings that fulfil the higher sound classes.
Walking noise: Walking noise is addressed in SS 25268 (version 2 2007) and referred to there as ”impact sound in same room”.
The requirement stipulates that walking noise shall be limited in spaces in which several persons are present more than
temporarily, such as in large office spaces, nursery schools, etc. Guidelines for measurement and assessment of percussive
sound are included in the SIS technical report 2007:15 (www.sis.se). The degree of walking noise is dependent on the floor
covering used. Contact Granab for more information prior to planning.
Conditions
Granab subfloor systems, including floor coverings, can be configured for various sound requirements.
In order to fulfill the intended sound class between rooms in buildings with Granab subfloor systems in both vertical and horizontal directions,
it is important:
- That the slabs and walls provide suitable conditions, which can be verified by calculating the sound insulation of unfinished floors and walls according to EN 12354 or by measuring the sound insulation during the production phase according to the standard methods. Measurements are made before the underfloor system is installed with temporary actions taken during measurement to prevent airborne sound leakage between measurement spaces.
- That Granab subfloor systems are installed by trained installers and and in accordance with Granab’s installation instructions and checklists.
- That Granab systems and the floor coverings are floating and do not have rigid contact points against the building framework.
- That sound leakage through joints and installations in floors and walls is prevented.
- That flank transmission via attached constructions – exterior walls, subceilings, etc. – is prevented.
- That sound transmission via ventilation ducts between flats does not occur.
- For more information, see Granab’s general delivery and sales terms.
Our systems
Environmental certification
Granab works actively to reduce environmental impact and has certifications that confirm our commitment to sustainability. All our subfloor systems have Environmentally Product Declarations (EPD).
