“How to Choose a Floor Structure” Article

In the recent Homebuilding & Renovation online magazine Ian Rock discusses the options when it comes to choosing a floor structure for both the ground and upper floors.

When it comes to ground floor the usual players are listed. These being beam & block, pre-cast hollowcore concrete beams and the basic concrete slab.

When it comes to the upper floors of a build Ian discusses the differences between the tradition timber joist and the newer joists on the market today, I-beams and metal web joists (commonly known as Posi-Joists or Eco-Joists).

Lewis Deck is identified as a perfect way of creating the upper floor deck without having all of the issues that a timber floor gives you.

“Timber has a tendency to suffer from shrinkage resulting in floors becoming squeaky over time, and is always potentially vulnerable to subsequent weakening from careless notching and drilling for pipe and cable runs”.

The article goes on to discuss other options available to you when thinking about your upper floor. Sound proof floors and also undefloor heating now seem to be the 2 main boxes that people are looking to tick off when thinking about their new upper floor. Lewis Deck covers both of these. With the addition of a cheap resilient material on top of the timber joist and a level of mineral wool insulation between the fllor joists, Lewis Deck easily goes passed the levels required by the current Part E of the Buildings Regulations where impact sound is concerned and with a 50mm screed floor this allows the floor to pass the airborne sound tests easily.

With 2 layers of plasterboard to the ceiling below you are also very close to achieving a 2 hour fire protection level too (for more information on this please visit the fire separation section of our website).

Lewis Metal Dovetailed Sheeting Deck with acoustic Sylomer resilient strips
Lewis Metal Dovetailed Sheeting Deck with acoustic Sylomer resilient strips

 

Underfloor heating is also easily taken care of with Lewis Deck. The 16mm pipes simply clip to the top surface of the deck and the (52mm) screed is then poured around the pipes. This gives the pipes total coverage with the screed meaning that when the pipes heat up they instantly transfer that heat into the screed. As the screed is a conductor of heat it then transfers this heat up to the surface enabling the room to start warming up very quickly.

UFH pipes
Lewis Deck with UFH pipes

As you can see from below this means a much faster response time than traditional “lay-in” timber or aluminium board type undefloor heating systems.

FAQs

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  • Q

    What are the Lewis Deck sheet sizes?

    A

    Q: What sheet sizes are held in stock for delivery within a few days after order? A: We stock 2500mm and 1300mm sheets.  These are all 630mm wide and 16mm deep.  Deliveries are made via the pallet network directly to site.  The smaller sheets are aimed at small bathroom renovation projects and can be supplied in small numbers via TNT. 2.5* and 1.3m sheets allow for the 100mm overlap to occur over a joist, with joist centres being either 300mm, 400mm, 600mm, 800mm*, 1200mm and 2400mm*. (*2.5m sheet only) For larger projects we are able to produce bespoke sheet sizes if required, please get in contact to discuss other options for sheet sizes.

    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.

  • Q

    Why don't my Lewis sheets interlock like they do in the video?

    A

    Q: Why don't my sheets interlock like they do in the video? A: The sheets have two sides (one printed, one plain), the dovetails on either side are different widths, it is then necessary to alternate the sheets print up and then print down.

    Q

    Is this a question?

    A

    If it is, this is an answer.

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"How to Choose a Floor Structure" Article - CDI