Internal Boards
Gypsum based boards for internal use.
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What fire rating does Siniat Fire Board give?
A plasterboard on its own does not give a fire resistance rating. It is the whole combination of products in a Siniat partition system which provides the fire resistance. For Siniat Fire Board , on our typical Siniat C-Stud framing, a single 15mm layer each side of the stud frame achieves 60mins fire resistance (insulation and integrity) and 2x 1
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Can I skim Megadeco Board?
If Siniat Megadeco is already installed and a skim finish is desired, then the board needs to be primed to accept that finish. Please contact your skim manufacturer for the suitable primer for a sealed plasterboard surface. Note Siniat Megadeco is a pre-sealed board ready to receive the Siniat tape and joint system. When Siniat Deco Joint Cement is
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Which side should a plasterboard be installed?
Plaster boards must be installed with the printed side against the substrate. For tapered edge boards, the taper is front face only and so can only be jointed and finished on that side.
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What U-value does your board provide?
A U-value (in the context of Drywall systems) is a measure of thermal performance through a complete wall, roof or floor element. Individual products provide levels of thermal resistance (R) which when calculated together, provide an overall U-value. You can compare different products thermal resistance by checking their R value. The Siniat Thermal
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What is the minimum radius that the 6mm Siniat Contour board can bend for the installation of a curved partition?
The minimum radius is 900mm and this is achieved by installing the board horizontally using a GTEC deep flange flex track , GTEC C-studs at 200mm centres and fixing the boards to a continuous band of GTEC Flat strap backing the horizontal joints.
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What is the make-up and what thicknesses are available of Siniat Contour board?
The Siniat Contour board is a thinner version of the Siniat Standard plasterboard. Siniat Contour Board is available as a 6mm thick board.
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Can I skim Aqua Board?
No, the surface qualities of Aqua Board do not allow for a plaster skim.
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How can I achieve a Severe Duty rating?
To achieve Severe Duty, you will need to meet as a minimum the lateral stiffness and impact resistance criteria as set out in BS 5234 Part 2. The maximum height of a partition is limited to a lateral deflection of 10mm when tested in line with this standard. Impact resistance is down to board selection. Any combination of two boards (at least 12.5m
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Which plasterboards give the best impact resistance?
Siniat LaDura, Megadeco and Universal boards offer the best impact resistance. The 15mm version of each used on a partition system as a single layer will provide Severe Duty assuming the maximum height is within recommendations.
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Does Siniat sell skim plaster?
No. Siniat does not manufacture skim plaster. However, third party skim plaster can be used on our boards as an alternative to taping and jointing. Refer to skim manufacturer's guidance for application details.
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Do I need to use a moisture resistant plasterboard if I am applying a full height tiled finish?
Siniat recommend the use of a Moisture resistant plasterboard in areas of high humidity like bathrooms for example. The final finish will be the first line of defence against moisture, but over time water can soak through grout if not sealed adequately. A moisture resistant board will give further defence to temporary exposure. Siniat supplies Mois
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Which way round should a plasterboard be installed?
Siniat Plasterboards must be installed with the printed side against the substrate The back of all plasterboards will have printed text detailing product manufacture data and board type. his must not be visible after installation. For tapered edge boards, the taper is front face only and so can only be jointed on that side in order to minimise the
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Does Siniat have a board that can achieve severe duty and offer moisture resistance?
Any combination of 2 layers of 12.5mm/15mm plasterboards each side of a stud frame will be classed as Severe Duty. To achieve Severe Duty with a single layer each side of the stud frame would require the use of 15mm LaDura, Universal, Megadeco or Aquaboard. Of these, LaDura is classed as H1 moisture resistance to BS EN 520, Aquaboard is classed as G
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What type of Moisture Board do I need to use in Bathroom environments, H1 or H2?
The use of moisture board in bathroom areas, the requirement for moisture board use in bathroom locations is set out as a recommendation in BS 8212 : Code of practice for dry lining and partitioning using gypsum plasterboard, which states ‘’ where the wallboard is to be exposed for short periods to humidity or moisture, for example in Kitchens and B
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What plasterboards should be used for framing out opening when installing dampers in partitions?
When creating an opening within a partition for a damper, the opening should be capped with the same number of layers and thickness of plasterboard as per the partition system with further consideration to the actual test data associated with the damper system. As a minimum both criteria must be met.
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Can an extra layer of plasterboard be fixed to an existing party wall to improve performance?
Fixing additional layer of plasterboard to an existing separating wall will likely yield some improved performance. However the amount of gain will be dependent on the specification of the original wall. As this is already a high performing wall (fire and acoustics) the increase in performance may not be that significant. To best advise, the specif
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Does the Siniat Tilebacker board provide or contribute to the fire resistance of a system?
Siniat Tilebacker board has not been tested as part of a system for fire resistance. The board is classified as A2,s1-d0 for reaction to fire similar to other internal plasterboards in the range. To create system with a specific fire resistance period, specify internal plasterboards to meet all requirements (fire, acoustic, robustness, height) then
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What configurations can I use Siniat Securtex in to achieve SR 1 for SBD requirements?
The following table from the Securtex brochure details the tested systems to meet SR1 of SBD. Our full Securitex brochure can be downloaded from our website (https://www.siniat.co.uk/en/performance/securtex) for all details on the concept, design considerations and comprehensive installation guidance.
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Can Siniat Thermal boards be adhesively fixed with the dot & dab method?
Siniat Plasteboards (excluding the foil backed boards) and Siniat Thermal plasterboards (details in Annex B of the Siniat Drywall Manual) can be used to line most masonry walls with the Universal bonding compound. Direct Bond lining systems are suitable for most level, masonry substrates. The substrate must be clean and dust free with all loose mat
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Can I use Dot and Dab system on a concrete ceiling to fix Siniat Thermal boards?
The Siniat Direct Bond Lining system is meant for wall linings only and not for use in a ceiling application. For that you should mechanical fix to a suitable framework or Siniat MF Ceiling grid.
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What is the embodied carbon of Siniat plasterboards?
The EPD datasheet is available on the Sinat website for interested parties to access. The standard that is was compiled too has been withdrawn so a newer version is in development to the latest standard. Whilst this work is completed, the old version (expired Apr 2023) can still be used for data as Siniat opinion is the new standard will not sigin
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Why is the weight of a plasterboard different to that printed on the back of the board?
The weight shown on the back of a plasterboard is a safety guide to highlight the importance of two man lift. When manufacturing two products (same board but different length for example) due to limitations of the printing process, only the heavier weight is printed. There is no issue with the board in such cases.
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Do plasterboards contain Polyfluoralkyl (PFAS) chemicals?
It can be confirmed that Siniat plasterboards do not contain PFAS.
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What is the moisture content of plasterboard?
As summarised in the technical datasheets for the various Siniat plasterboards, the moisture content of a plasterboard is less than 2% after manufacturer.
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What can be done when plasterboards are subjected to water?
It is important to store plasterboard in a manner that protects it from the environment. The installation of plasterboard should be carried out once the area is water tight so not to risk exposure to water. If plasterboards are subjected to water, the boards themselves may not necessarily show water damage straight away. Siniat suggest areas that ha
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Do Moisture Resistant plasterboards have anti mould properties?
Moisture resistant plasterboards (Moisture Board, Fire MR Board, Coreboard and LaDura) have additives to provide a level moisture resistance only. These do not contain biocides to combat mould growth. Siniat Aquaboard is the only internal plasterboard that contains an antimicrobial biocide within its core which protects against mould and fungal deve
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Can plasterboard be installed horizontally (long edge) as well as vertically?
From a mechanical perspective, you can install plasterboard with the long edge either horizontal or vertically. What is important is the boards are fixed to framing components at the correct centres. With systems that are required to have a fire resistance and are installed to the latest fire regulations and standards, in order to be in line with th
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What plasterboards can be used as part of the Siniat framed encasement system?
Siniat encasement systems are all based on 12.5mm and 15mm Siniat Fireboard. Siniat Fireboard is defined as Type F to BS EN 520 and it is Siniats opinion that Fireboard can be switched with Megadeco or Universal boards to achieve the same fire protection as these are both Type F also. Should it be desired to used Universal or Megadeco instead of Fir
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Do the wind loadings stated in the Weather Defence brochure account for internal wind loadings as well as external wind loadings?
The designed for wind load is the maximum magnitude that can be withstood by the Thruwall element. The load can be positive or negative (pressure or suction). Typical design range is 1kN/m2 to 1.8kN/m2 but can be more or less. Internally, unless advised by the project design team, internal pressure is default designed to 200Pa (0.2kN/m2) which is ea
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What is the recycled content of Siniat Plasterboards?
Siniat have published updated EPD (environmental product declaration) on its Website. If you use the filters on the left hand side to select certification, this will show EPD available (along with other certs). The full EPD are available or summary sheets for each board highlighting the main points. Example below - use of secondary material (recycl