A complete soundproofing solution for a London flat

If you live in a flat and want a wooden floor, the chances are you’ll need to install some sort of soundproofing. For the majority of customers, this will simply involve fitting an Impact Sound Reduction Membrane.
Posted on25-03-2018 by 145

If you live in a flat and want a wooden floor, the chances are you’ll need to install some sort of soundproofing. For the majority of customers, this will simply involve fitting an Impact Sound Reduction Membrane. However, in certain circumstances, a higher performing solution is required. This was the case for one of our latest projects in Holland Park.

We had to be careful to protect the wires and pipes running between the joists

We had to be careful to protect the wires and pipes running between the joists

Site preparations

During our work, we had to be mindful to work quietly to minimise the impact of the workon the neighbours. Our first job was to remove the existing carpet and acoustic underlay. The original floorboards were then taken up, allowing the team to clean between the joists. From this point, we had to be extremely careful not to drop anything or lose our footing. Temporary plywood was used to create a safe working area.

Sound proofing materials

Acoustic mineral wood was fitted between the joists and blue joist caps were fixed on top to separate the joists from the new subfloor. Without the caps, sound vibrations would simply travel through the new floor to the joists and the room below. Plywood boards were then glued to the top of the joists (screwing them down would reduce the efficiency of the soundproofing.) We had to adjust each side of the ply, to create a tight fit, so it would be strong enough to take the weight of the new floor. Wall and ply acoustic strips were then installed around the edge of the room. An Impact Sound Reduction Membrane made up the final layer, which was glued into place and then flattened with a 70 kilo roller, to create a secure bond.

Mineral wool and joists caps fitted

Mineral wool and joists caps fitted

Plywood sits neatly on top of the joists

Plywood sits neatly on top of the joists

The Impact Sound Proof Membrane is glued into place

The Impact Sound Proof Membrane is glued into place

Laying the parquet

After fitting the soundproofing, we were in a position to install the 24 sq m of oak parquet. The room was accurately measured and the alignment of the new floor was set, which also took the position of the fireplace into account. The floor featured a single border with mitred corners and the fireplace was framed with wider matching oak engineered boards.

Accurately measuring the border for the fireplace

Accurately measuring the border for the fireplace

We laid the parquet in the middle of the room, working towards the walls

We laid the parquet in the middle of the room, working towards the walls

All corners were mitred for a clean and professional finish

All corners were mitred for a clean and professional finish

Finishing the floor

Once fitted, the parquet required a light sand, before being finished with 2 coats of Osmo Satin Clear Oil. When the sealer had dried, the new skirting boards were fixed into place.

The unsealed parquet

The unsealed parquet

The sealer adds warmth and depth to the oak

The sealer adds warmth and depth to the oak

The end result

Fully soundproofing a floor is very efficient at reducing footfall and airborne noise, cutting out around 60 decibels, which is equivalent to the noise generated by a loud television. It is messy, disruptive and expensive work however, but in some properties, like this flat, it’s the only viable option. Our work was completed to a very high standard and as a result, the homeowners won’t disturb their downstairs neighbours with their new wooden floor and they will also enjoy the benefit of hearing less noise from them.

The soundproofing had a minimal impact on the height of the new floor

The soundproofing had a minimal impact on the height of the new floor

The stunning new parquet wood floor

The stunning new parquet wood floor

FLOORING PRODUCTS

Parquet - Oak Parquet Premier Unsealed 400 mm x 100 mm, product code OLPW/400 from The Natural Wood Floor Company

Fireplace border - Oak Premier Unsealed, The Natural Wood Floor Company

Finish: Osmo Polyx Oil Clear Satin

Location: W11 Holland Park, London

Related
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Engineered Herringbone parquet flooring: Herringbone is one of the first parquet pattern emerged in Europe and also is the most common. Parquet is the floor of floors among wooden floors, mainly because of it’s cost and the craftsmanship needed for installation. Also because of the final exceptional look. Engineered Herringbone parquet battens come in different sizes.

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Karmaplus Acoustic Perimeter Strip: Karma Acoustic Perimeter Strip consists of 100% recyclable non-crosslinked polyethylene foam. The product is designed to prevent any flanking transmission and maintain the acoustic integrity of a structure. Karma Acoustic Perimeter Strip is installed at a structure’s floor and wall perimeter.

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Karma Acoustic Joist Hood Insulation: is suitable for use in the refurbishment of timber joist floors within masonry constructions and also useful in "Room in a Roof" applications. Consists of a 12mm profiled low-density polyethylene foam with gas impregnated acoustic additives. Specifically designed to friction fit onto the joists.

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Earthwool Acoustic roll - Undrefloor Mineral Wool roll from Knauf provides a high level of sound absorption, whilst also improving the thermal and fire performance of the wall, floor or partition. Using glass mineral wool as a sound absorbent layer in partitions and floors significantly improves their acoustic performance, whilst only adding minimally to the overall mass of the structure.

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Pipe Collars - solid Oak: are designed to be used around the edge of pipes which go into the floor to hide the expansion gap which is required when installing wooden flooring. Oak Pipe Cover is designed in two halves that can be fixed around 15mm pipes to hide expansion gap It is suitable for any wooden flooring, regardless of your floor being oiled or lacquered.

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Sikabond T52 FC Elastic wood flooring adhesive: is a gun or trowel applied elastic wood flooring adhesive for use with any width board. It is also used in conjunction with silent layer mats as part of the AcouBond system.

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