FEATURE ALL ABOUT THE BASE
We often get asked the main differences between the three different types of ScreedBoard that Cellecta manufacture, is it just the thickness - 20, 28 & 30?
The short answer is no, there is more to it than that. Here we will explore the applications and solutions that the different types of ScreedBoard should be specified in to help you select the most appropriate one for your project.
It would be prudent to start with ScreedBoard 20, as this is the base board for all the versions Cellecta manufactures. This is 20mm thick, high density overlay board that is manufactured out of 100% recycled gypsum and cellulose.
The board has exceptional levels of density, a low thermal resistance, and exceedingly low levels of natural movement. This makes it an ideal overlay board for underfloor heating systems, allowing heat from the UFH pipes to pass through the board, ensuring a more responsive system when compared to screed or chipboard/ply overlays.
Future Homes Standards and current Part L put an emphasis on low flow temperatures and are encouraging heating systems to move towards more carbon-friendly sources of heating, such as ground source heat pumps.
In light of this, utilising ScreedBoard 20 over a routed insulation, such as Cellecta’s Mojave System, will offer excellent heat outputs and comfort at flow temperatures lower than the maximum 55C detailed in the Part L uplift.
Ben Banks, Technical Director at Cellecta, explains the difference between its ScreedBoard 20, 28 & 30 and when each should be specified according to each project’s acoustic, structural, and fire performance.
Although Part B stipulates that Fire Separation in dwellings is typically done from the underside to ensure protection of the structural elements, it is becoming increasingly popular to look at other areas of floor designs to increase fire performance. ScreedBoard 20 has been tested for its fire classification and achieves an A1 – non-combustible rating.
Finally, due to its very minimal thermal expansion (0.015mm/m), no further decoupling layers are required when installing sensitive floor finishes such as tiles, LVT or vinyl – minimising the labour costs and time when installing these aesthetic floor finishes.
Whilst ScreedBoard 20 has a high level of mass and density and therefore offers good acoustic properties particularly when it comes to airborne sound, the 20mm board by itself is not enough to meet the requirements outlined in Part E of building regulations. However, when added to a resilient layer, this board becomes the natural choice for all types of separating floors, which leads us on to ScreedBoard 28 and 30.
Both acoustic platform systems incorporate a high- performance resilient layer, FIBREfon 8 or FIBREfon 10, which are fully bonded to the ScreedBoard 20 on our state- of-the-art production lines, providing two boards to cover a wide range of applications.
ScreedBoard-20 — 32 —
www.tomorrowstileandstone.co.uk
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