F7 9mm Sound Insulation Underlay 1.2m x 1.2m

1. 3mm Mass-loaded vinyl 7.5kg/m² – High mass barrier layer for sound absorption.
2.  Closed cell foam 6mm  – Acoustic grade foam to dampen and absorb vibration sound.

• Thickness: 9mm
• Size: 1200mm x 1200mm (1.44sqm)
• Weight: 12kg per sheet

Thermal Resistance R:

• Closed Cell Foam: 0.23 m² K/W
• Mass-loaded vinyl 0.14 m² K/W

Thermal Conductivity λR:

• Closed Cell Foam: 0.039 W/mK
• Mass-loaded vinyl 0.037 W/mK

Reaction to Fire

• Closed Cell Foam: FMVSS 302
• Mass-loaded vinyl 10kg EN 13501-1 B-s2,d0 (2

The higher the figure for airborne, the better the performance. The lower the figure for impact the better the performance.

Timber floor Airborne results

18mm chipboard laid direct to 200mm joist with 10mm plasterboard.

Without soundproofing 41dB

With 9mm Acoustic Underlay 46dB

With 9mm Acoustic Underlay and 100mm insulation 50dB

With 9mm Acoustic Underlay and 100mm insulation with  Soundbreaker bars and 12.5mm plasterboard (two layers) 57dB

Timber floor impact results

18mm chipboard laid direct to 200mm joist with 10mm plasterboard.

Without soundproofing 79dB

With 9mm Acoustic Underlay 54dB

With 9mm Acoustic Underlay and 100mm insulation 52dB

With 9mm Acoustic Underlay and 100mm insulation with  Soundbreaker bars and 12.5mm plasterboard (two layers) 49dB

Concrete floor impact results

Due to the high mass of concrete flooring, acoustic underlays are only used to reduce impact noise.

200mm Concrete flooring

Without soundproofing 79dB

With 9mm Acoustic Underlay 54dB

Note: Every 10 decibels(dB) reduction in noise level is roughly perceived as a halving of the perceived loudness. So, for instance, if you have a sound that measures 70dB and it decreases to 60dB, it would sound about half as loud to the human ear. Decibels explained.

• Laid directly over the existing sub-floor
• Loose laid no requirement to bond to the floor. Part E requires bonding for new builds and conversions.
• Butt the edges together
• Reduce movement with High Tack Tape along the joins
• Cut to size using a sharp knife or a fine toothsaw

Carpet as the floor finish

Acoustic underlays can be used directly below the carpet. When installing the underlay, you should consider using the perimeter edging strip to ensure the gripper rods are the same height as the carpet. The gripper rods and the perimeter edging should be nailed to the floor using a 30mm nail.

Hard floor finishes equal to or less than 14mm

Hard floor finishes, including laminate, engineered, and tiles, should use a resilient layer between the soundproofing and the floor finish. We recommend 9mm MDF T&G interlocking sheets. The layers are secured using a floor-grade adhesive such as Isobond floor adhesive. To prevent potential flanking sound from transmitting from the floor to the walls, isolate the flooring using isolation tape fixed to the wall.

Hard floor finishes over 14mm

Floor finishes over 15mm can be installed directly on the soundproof mats. Secure the flooring using the Isobond adhesive. Isolate the flooring using isolation tape fixed to the wall to prevent potential flanking sound from transmitting from the floor to the walls.

Product Brochure

Performance Data

Fitting

Due to the nature of most of the materials we supply, orders are typically delivered on pallets.

All orders will be carefully wrapped, protected, and securely palletised to ensure they arrive in the best possible condition. Goods will be delivered as near to the property as possible. The drivers will not be able to carry orders into your property.

Deliveries are made between 8:00 a.m. and 6:00 p.m., Monday to Friday.

We charge a flat delivery rate of £60 plus VAT for palletised deliveries. We do not charge per pallet, regardless of the number of pallets used to deliver your order.

Orders placed for items weighing less than 20kg will be sent via courier for £20 plus VAT.

We have a high stock level and typically deliver orders in approximately three to four working days.

If you would like to speak with us about your delivery, please call 01423 339163. Alternatively, you can send us your delivery enquiry.

Please review our full delivery terms for more information.

Delivery Information