How and where to use guide
Gtec Siniat Moisture Plasterboard 2400mm x 1200mm x 15mm TE (50)
Suitable applications and locations
This moisture-resistant board is the correct choice for any internal wall or ceiling in areas where moisture levels remain elevated. Primary applications include kitchen walls (particularly behind sinks and cookers), bathroom walls and ceilings, utility rooms, cloakrooms and any other spaces with regular water exposure or high humidity. It is not suitable for external use or for areas subject to direct water spray or immersion. Standard plasterboard must never be used in these locations as it will absorb moisture, swell and lose structural integrity.
- Kitchens: walls around sinks, cookers and food preparation areas
- Bathrooms: walls and ceilings in shower rooms and wet rooms
- Utility rooms: laundry areas and spaces with washing machines or tumble dryers
- Cloakrooms and WCs with high humidity
- Any internal partition or ceiling in moisture-prone environments
Installation and fixing
Install these sheets using standard plasterboard fixing methods. Sheets should be fixed to timber or metal studs at 400mm centres using galvanised or stainless steel fixings to prevent corrosion in damp conditions. Avoid standard steel fixings which will rust and stain the board surface. Joints should be taped and finished with moisture-resistant joint compound. Ensure adequate ventilation during and after installation to allow any construction moisture to escape. The 15mm thickness is suitable for standard stud spacing and provides good acoustic and fire performance without additional reinforcement in typical domestic applications.
- Fix to studs at 400mm centres with galvanised or stainless steel fixings
- Use moisture-resistant joint compound for taping and finishing
- Ensure proper ventilation during installation and drying
- Protect sheets from rain and standing water during storage and installation
- Allow adequate drying time before decorating
Maintenance and limitations
Moisture-resistant plasterboard is designed to withstand humid conditions but is not waterproof and must not be used in areas subject to direct water spray, splashing or immersion. In bathrooms, use this board on walls but ensure proper waterproofing measures (tanking or waterproof membranes) are applied to areas behind baths, showers and wet room floors. Ventilation is essential to manage moisture levels effectively. Poor ventilation will cause moisture to accumulate regardless of board type. Inspect regularly for signs of mould or dampness and ensure extraction fans and windows are used to control humidity. The board will perform reliably in normal kitchen and bathroom conditions when properly installed and ventilated.
- Not suitable for direct water contact or splash zones without additional waterproofing
- Requires proper ventilation to manage humidity effectively
- Use extraction fans in bathrooms and kitchens to control moisture levels
- Inspect periodically for mould or signs of excessive dampness
- Ensure gutters, downpipes and external drainage prevent water ingress into the building
Storage and handling on site
Store sheets flat and dry on a level surface, protected from rain and ground moisture. Stack sheets carefully to avoid damage to edges and corners. Keep the pack in its wrapping until required to minimise moisture absorption during storage. Ensure the storage area has adequate ventilation and is not subject to condensation or standing water. Handle sheets carefully during transport and installation as damage to edges can compromise the moisture-resistant properties. Damaged sheets should be set aside and not used in moisture-prone areas.
- Store flat on a level, dry surface away from ground contact
- Keep wrapped until installation to prevent premature moisture absorption
- Ensure storage area is well ventilated and protected from rain
- Handle carefully to avoid damage to edges and corners
- Remove damaged sheets from moisture-prone applications