This easy-to-install solution for upstairs floors offers a budget-friendly alternative to to block and beam construction.


modern house with slanted roof and scaffolding to exterior

Image: CDI Innovative Construction Materials 

One of the great features of self building is the ability to integrate modern and innovative construction methods. We lift the carpet to look at what Lewis Deck can do for your project…

Float on

Traditional house builds usually require upper floors with a heavy beam and block system to move away from weak timber floors – these are time consuming and expensive to install and they work best, generally, in multi-build developments – in design-led, one off or self-build houses using beam and block could add in un-necessary costs.

Lewis Deck, available from CDI Innovative Construction Materials Ltd, is an alternative that means you can have an upstairs floor as strong and supportive as your downstairs concrete floor, without the expense of the crane that is required for the construction of block-and-beam. Not just that, the Lewis Deck has numerous other benefits.

dovetailed metal sheeting inside a new build home

Image: CDI Innovative Construction Materials 

How Lewis Deck works

Lewis Deck is dovetailed, cold-rolled steel sheet, laid onto timber joists, that is covered with a self-levelling liquid screed or a thin concrete layer. Working in tandem, they ensure the new floor has a very high load-bearing capacity.

The end result is a solid, exceptionally strong, non-squeaky floor that is speedy to install that works brilliantly with underfloor heating, which is easy to incorporate. Installed as a floating floor, you can use resilient strips to achieve even better acoustic benefits, cutting down on airborne and impact sound. There’s also peace of mind in the form of fire protection that meets UK standards and offers protection of up to 2 hours.

converted factory with vans and cars in foreground

Image: CDI Innovative Construction Materials 

Cut down on complications

Another benefit of using Lewis Deck is that it’s simple to install. While you may well be hands-off during the construction of your new build, renovation or extension, competent DIY enthusiasts will be able to install the deck.

It also works superbly for wet rooms, whether in a new constructions or as an update to your current home. The deck is laid down and a damp proof membrane incorporated onto the installed concrete screed (concrete screeds are advised for use in wet room areas). The falls to the drain can be built into the floor, ready for tiling. It’s an elegant solution that provides strength, security and no danger of cracking or leakage, while underfloor heating in your bathroom can provide that cosy finish many desire.

two men laying an underfloor heating system

To discover more about the Lewis Deck and to see a case study featured in the Grand Designs series, visit their Lewis Deck website.

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