lewis deck
Applications

Applications

Our innovative products cover a wide variety of applications and potential uses.

They offer numerous benefits and solutions for the design team right through to the end user of the building and they have been on projects all over the world. Look below for an overview of the products within our range.

Underfloor Heating

Lewis metal deck and underfloor heating

We stock and supply a number of floor systems that provide the same or an improved performance as a traditional underfloor heating concrete ground floor, but for suspended floors.  Suspended floors are typically constructed using timber or steel beams or joists and are above a void or a room below. These systems include a steel …

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Acoustic Separation

Acoustic or “soundproof” floors are the floors between two rooms of a house, upstairs and down, between flats, one over the other or between spaces of different use, for example an apartment over a restaurant. Acoustic separating floors can simply be used to improve the comfort of the occupants, for example to reduce the noise …

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Fire Separation

Fire separation within floors is a key component of achieving the performance required to allow the evacuation of a building during a fire, this is expressed as a time in minutes and is typically 30, 60, 90 or 120 minutes.  Different building types require different levels of performance. Typically in houses this doesn’t kick in …

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Load Bearing

Lewis Deck load bearing test

The load bearing capacity of a floor or roof is key to its successful application within the building and ensures that it is up to the task it is being asked to do. This ranges from relatively the simple and small domestic loads associated with houses and apartments through to commercial application from offices through …

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Ground Floor

We have a number of innovative Ground Floor solutions that can be used in either new-build or renovations. These include the FastSlab ground floor for replacing rotten suspended timber floors with an insulated, light weight screeded ground floor often incorporating underfloor heating, the FastSlab foundation system that includes steel screw-piles and an insulated ring-beam system …

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Foundation

FastSlab foundation system

Foundations are often the “unknown quantity” when it comes to build costs. Ground conditions, access, slopes, etc all have their part to play and can significantly add to the complexity of the project. We can supply a fast track, lightweight, quick install foundation system with steel screw-piles, a steel lattice ring-beam, the FastSlab internal floor …

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Load Bearing Flat Roofs

Op-Deck Terrace within the Nudura curly house

Including a roof that can be used as a place to park a car or use as a terrace can prove to be a challenge, we have a number of systems that are either designed for this or can be used for this application. Key to the success of a roof such as this is …

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Wet Room Floors

Octagon Homes Kingswood mansion house conversion wet room, bathroom large format marble tiles underfloor heating

Creating a wet-room in either a new-build or renovation situation on the 1st floor is often complicated by the presence of timber floors that move and flex and therefore end up with expensive leaks. Our systems are primarily floor strengthening and reinforcing systems that also allow the incorporation of wet room drains directly into the …

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Balconies

Cornwall balcony steel frame concrete deck

A balcony is an exciting and often focal point to any house, apartment or other building, giving that feature a solid concrete feel to the surface conveys the quality of this key element of the building to all that use it. Depending upon the span to be achieved we have a number of systems that …

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Lead Flashing Alternative

non-lead flashing

Lacomet FL (FL for flexible) is an aluminium based flashing material that is ideal to be used for new-build, renovation, for conservatories or around solar panels, etc. It is especially useful to combat the theft of traditional lead as it has no resale or scrap value Used in combination with the Lacomet Polymer Adhesive it …

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FAQs

Ask CDI a Question

Q

Can joists and decking for Lewis FastSlab be cut by hand e.g. hacksaw or angle grinder?

A

The FastSlab beams and the Lewis Deck are generally cut on site. Typically we see the Lewis Deck being cut with an angle grinder, a circular saw or a powered hacksaw.

The FastSlab beams can be cut with the same – the hacksaw possibly being the best option here.

Q

Do I keep my joist centres at 400mm when using Lewis Deck?

A

One of the great things about using Lewis Deck is that it opens up a number of different options for you and one of them is around joist centres you can work with.

Traditionally we see the vast majority of architects and designers insisting that timber joists be installed at either 400mm or at most 600mm because this is the limit of what timber floor systems will effectively span to. Now with Lewis, because of its unique profile (with the dovetails dimensions) and the way it interacts with the thin (50mm) screed laid on it, you can actually go much wider than these figures. With a 50mm screed, on top of the sheets, Lewis allows you to have unpropped centres of up to 1200mm (1.2m). Even at these much wider centres Lewis will allow you to have a permissible load of 14.8kN/m2, which in English is just under 1.5 Tonnes per m2. Now this might sound fantastic, and it is, but in reality for 95% of new build homes this figure won't really make too much difference to what you were planning on doing with upstairs. What it does mean though is that at your normal centres, of approximately 600mm, your floor becomes so much stronger than traditional forms of floor structure that it allows you to do things on the 1st floor that you take for granted on the ground floor. First of all is the obvious one, you get a solid floor, meaning no more squeaky floor boards or hearing people walking around upstairs and knowing exactly where they are up there! Having the solid floor gives you the chance to have a very efficient underfloor heating system (see our applications section for more details) which in most cases will probably mean a slight reduction in your fuel bills. Other big benefits of having a stronger floor upstairs include being able to have either thinner tiles or much heavier tiles than you can use on timber floor systems. The screed and Lewis working together pretty much stops any deflection in the floor meaning that these types of tiles won't crack or move and lift over time as the floor doesn't move or deflect! So in conclusion yes you can have much wider joist centres than the 400mm centres that you normally see on new developments but even if you wanted to keep them the same by using Lewis Deck it opens up so many benefits that you just aren't able to incorporate with traditional timber floor systems. However the joist centres are usually controlled by the load capacity of the joist and not the spanning capacity of the Lewis Deck.

Q

Do you fix Lewis Deck down to the joists?

A

The short answer to this is no Lewis Deck doesn't have to be fixed down.

Generally the reason why people choose to use Lewis Deck over more traditional floor systems is that they are looking to enhance the upper floor that they are working on. So if you are going to be looking at using Lewis then you might as well look to incorporate its full range of benefits. One of which is the major uplift in acoustic performance that you get from using the system. Getting the best results, acoustically, is achieved by laying the floor as a floating floor. This then creates separation between the supporting floor joists and and the steel deck. To enhance this further introduce a resilient strip on top of the joist. See below. [caption id="attachment_559" align="alignnone" width="300"]Lewis Metal Dovetailed Sheeting Deck with acoustic Sylomer resilient strips Lewis Metal Dovetailed Sheeting Deck with acoustic Sylomer resilient strips[/caption] When it comes to determining which of our acoustic resilient strips to use (because we have a few of them and they all do different jobs depending on the use of them and the type of structure below) we are happy to help you come up with the correct option that suits your project the best. A standard Lewis Deck floor detail (such as the detail above) easily achieves UK requirements for acoustic (as well as fire) resistance for residential separating floors. Higher performance standards are easily achievable too. Because of this we have seen Lewis Deck used frequently in in bespoke projects such as live music/ theatre venues, cinemas, recording studios, specialist test labs, plant room floors and many other commercial applications. Note: some joists my require lateral stability and therefore lateral restraint straps or timber noggins or a sacrificial timber board may be required to achieve this, your joist supplier or designer will be able to provide this information, in some cases the Lewis Deck can be fixed down to provide this action if required. Please feel free to give us a call and discuss this further should you wish to do so.

Q

Lacomet – How come it has no scrap value?

A

Lacomet – How come it has no scrap value? Many of the projects that we get involved in starts with a phone call or email to us from someone researching replacing stolen leadwork. Many of these are old buildings, such as schools or churches, where this isn’t the first time that the lead has been stolen and they call us fed up with having to replace it again full in the knowledge that they will more than likely go through the same problem once more in the near future if they continue to use lead. One of the big benefits that Lacomet FL brings to a project is the fact that it has no scrap value and therefore the chances of it being stolen are massively reduced. Due to the 2 thin aluminium layers, and its five layer total construction, it is of no value to thieves. Lacomet can be recycled but the polyester based coating would need to be de-laminated first and the amount of recovered aluminum is then very low, in fact it would be easier and more profitable to collect empty drinks cans than to mess about stripping Lacomet down. We can also supply stickers that can be placed in strategic locations informing people that what is now on the roof is not lead and that it has no scrap value.

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Latest Events

and Exhibitions

Latest Blog

CDI 2017

We've a new model down at Swindon!

18th May 2017

One of the great benefits that you get from introducing Lewis Deck into a residential development is the option to install a wet room floor into bathroom/ en-suite areas with extreme ease compared to other flooring systems as well as maintaining one solid concrete slab in the room reducing the possibility of leaks from a …

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Homebuilding & Renovation Show

23rd March 2017

The end of March saw us attend our 2nd exhibition of the month. This time at the Homebuilding & Renovating Show held at the NEC in Birmingham. Our longest show of the year, and one that we’ve attended for the previous 6 years, is the first Homebuilding show of the year. It also seems to …

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Ecobuild 2017

16th March 2017

March is always a busy time for us. Not only is it a lot of companies end of year (so we seem to get inundated with last minute orders!) but it’s also our busiest month when it comes to trade shows, and it begins with the biggest one we do, Ecobuild. Ecobuild, held at Londons …

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Lewis Deck and underfloor heating

LEWIS DECK AND UNDERFLOOR HEATING

28th February 2017

Introduction The Lewis® Deck system is a system that allows the introduction of a suspended lightweight concrete or screed floor into the upper floors of buildings on top of beams or joists. This system provides solutions for acoustics, fire, high loads, underfloor heating (UFH) and wet rooms, it can achieve all of these simultaneously with …

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underfloor heating pipe being laid on Lewis Plate

Another mention in the house building press

28th February 2017

The Lewis Deck has been picked up by a number of magazines over the years, here is the latest mention in a discussion about underfloor in the Real Homes Magazine: Underfloor heating: your questions answered Underfloor heating: your questions answered Thinking of installing underfloor heating? Real Homes has posed your most-asked UFH questions to industry …

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A new chapter for CDI-ICM

17th August 2016

A very warm welcome to the beginning of a new chapter for CDI-ICM. Today we take a very big leap into the 21st century and post our first blog to go alongside the creation of our new website (www.cdi-icm.co.uk). The plan is to post updates at regular intervals keeping you updated about what we are …

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Another Day another Lewis load.

16th January 2017

It might only be the middle of January but already we are seeing a number of projects that we were working on during the back end of 2016 starting to come across the line. Today we have 3 full packs of 60 sheets packed up and ready to head south to a renovation project in …

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