New Timber Framed House, Cheshire. - CDI
New Timber Framed House, Cheshire.

When looking at different forms of structure for new properties there are a few key differences when using Lewis Deck with timber frame compared to other structural forms.

Timber framed houses require the upper floor (s) of the building to provide wracking to building. Essentially this means that the floor acts to prevent the building from twisting/ buckling. This is the case at this timber framed house project in Cheshire.

As part of the structural design, of this type of building, the floor cassette is finished off with a timber board fixed down to the top of the timber joists. This connection provides the wracking that the building needs.

In order to use our Lewis Deck system to its full in a timber framed building Steve followed our advice to the letter. On top of the timber floor he installed our 25mm mineral wool resilient strips. This provides the acoustic barrier between the deck and the screed and the structure below.

You can see this in the photo below. Also, in this project, the non-loadbearing walls were installed prior to the deck being installed. Again to maximise the floors performance, our 20mm mineral wool flanking strips were used around all the pre-installed walls to provide the expansion and acoustic barrier needed. The Lewis Deck was then installed above, as per instructions.

Once all of the deck is installed the underfloor heating pipes can be installed above. Note, as you can see from the 2 photos below is that a plastic clip rail system is, by far, the easiest and most simplistic way of installing underfloor heating on top of Lewis Deck. These require only a few fixing per rail rather than having thousands of individual p-clips holding down the pipes.

Once everything is in place the screed can be installed.


"Extremely happy, thank you. It's the first time I've installed your system and will definitely be using it again".

Steve, Developer, Cheshire.

Screed Installation on top of the underfloor heating pipes.

Underfloor heating installed at 52mm thick giving the required 20mm cover to the underfloor heating pipes. This depth is gauged by using the levelling “tripods” set by using laser levels. On this project an anhydrite screed was used. These screeds are ideal to use with Lewis Deck and underfloor heating.

Once an area is completed the tripods are removed and the area is “dappled” to remove air bubbles from the screed and also to level the surface and provide a smooth surface.

Once the screed has cured and dried, which are two different things, all shutters (such as the one on the photo below to the edge of the stairwell opening) can be removed prior to the floor finishes being installed.


We thank Steve for his consent in using these photos from his current project and we look forward to working with him again in the future.

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New Timber Framed House, Cheshire. - CDI