3.5mm Isocheck Underwood - Timber Floor Acoustic Underlay Mat

3.5mm Isocheck Underwood - Timber Floor Acoustic Underlay Mat
- Product Code: A1-3245
- Delivery Time: 3 - 5 days
- Brand: Isomass (Tech. support: 08458383389)
- Model and Size: 10m x 1m - 10m2
- Weight: 12.60kg
Our ratings on 09-06-2025:

4.8 out of 5
3.5mm Isocheck Underwood - Timber Floor Acoustic Underlay Mat
Width: 1000mm
Length: 10000mm
Density: 360kg/m3
Weight/m2: 1.26kg
Weight: 12.6kg
3.5mm Isocheck Underwood is a rubber crumb underlay for use with laminate and wood flooring to provide resilience, durability and support to protect against undue stress in wood and laminate flooring. Isocheck Underwood is manufactured mainly from recycled vehicle tyres bound in a unique latex formulation. The integrated metallised scrim ensures good resistance to moisture transmission, eliminating the need for additional polythene sheeting. Isocheck Underwood is ideal for underfloor heating systems beneath laminate and engineered wood flooring.
- Made mainly from recycled vehicle tyres,
- Suitable for laminate and wood flooring,
- Excellent impact sound insulation properties,
- Ideal for underfloor heating,
- Integral moisture barrier.
- Can be used also on concrete floors, on top of the screed.
- Over existing floorboards,
- On timber joisted floors,
- Refurbishment,
- Conversion projects,
- New build.

- Lay Underwood over the entire level floor with all joints tightly abutted.
- Most t&g or interlocking engineered timber panel floor finishes can be laid directly onto Underwood.
- Finished timber floors should be isolated from the skirting using Isocheck Acoustic Flanking Band.
Brand: Isomass
Model and Size: 50mm x 10mm x 10m - Free Delivery
Delivery Time: 1 - 2 days
50mm x 10mm x 10m Isocheck Acoustic Isolation Strip is utilised to improve acoustic insulation and reduce impact sound transmission in masonry, steel, and timber partition and separating walls. These strips are crafted from cross-linked Isopoli foam and feature an adhesive backing, ensuring the..
£33.92
£40.70 inc VAT
Brand: Isomass
Model and Size: 1.2m x 1m - 1.2m2
Delivery Time: 3 - 5 days
7mm Isocheck Isomat 7 is a 6mm layer of Isofiba bonded to performance enhancing barrier membrane to reduce sound transmission through timber floors. It can support chipboard, OSB, MDF or Plywood floors. It enables a timber floor to meet the sound transmission regulations of Approved Document E 2003 ..
Brand: Isomass
Model and Size: 27/54 - 25mm - 2m Free Delivery
Delivery Time: 1 - 2 days
25mm Isocheck Expandastrip 27/54 is a permanently elastic open cell Polyurethane foam, used as a seal in joints between pre-cast units, sealing around doors and window frames, or between corrugated roofing panels, roof structures and roof lights ventilation and air conditioning ductwork. It is impre..
Brand: Isomass
Model and Size: 45mm
Delivery Time: 3 - 5 days
45x45mm Isocheck Shallow Batten is part of a suspended concrete floor system, designed for reducing sound transmission and improving acoustic performance of level concrete floors. The system is used in new build refurbishment and conversion applications, including the possibility of combining i..
Guide Price: £7.17
£8.60 inc VAT
Brand: Isomass
Model and Size: 10m x 1m - 10m2
Delivery Time: 3 - 5 days
3.5mm Isocheck Underwood is a rubber crumb underlay for use with laminate and wood flooring to provide resilience, durability and support to protect against undue stress in wood and laminate flooring. Isocheck Underwood is manufactured mainly from recycled vehicle tyres bound in a unique latex formu..
Brand: Isomass
Model and Size: 600mm x 2400mm - 1.44m2
Delivery Time: 3 - 5 days
23mm Isocheck 23C is an overlay platform system, designed for reducing sound transmission, including impact sound transmission and improving acoustic performance of concrete floors. Isocheck 23C is used new build, refurbishment and conversions of concrete floors, able to meet the requirements o..
Guide Price: £44.03
£52.84 inc VAT