Frequently asked questions about the Waterproof gyprock category
What is Waterproof gyprock and where is it used?
Waterproof gyprock is a moisture-resistant gypsum board used for interior finishing in bathrooms, kitchens and laundry rooms. It has a water-resistant surface and mould-resistant properties, suitable for wall cladding and frame constructions in high-humidity areas.
What is the difference between KNAUF GKBI13 2.6x1.2 and 3.0x1.2? Why choose different lengths?
KNAUF GKBI13 2.6x1.2 is 2.6 m long and 3.0x1.2 is 3.0 m long, both 1.2 m wide. Longer boards reduce the number of joints and speed up installation on tall walls and ceilings.
Where is the MINI GKBI13 900x1300 board suitable?
WATERPROOF PLASTERBOARD MINI GKBI13 900X1300 is suitable for small rooms, repair works and tight spaces. The 900x1300 mm size is convenient for niches, partitions and areas with limited access.
What advantages does KNAUF GKBI13 waterproof gyprock have over standard plasterboard?
KNAUF GKBI13 features a water-resistant surface and improved mould resistance compared to standard plasterboard. This makes it better suited for bathrooms and kitchens where standard boards deteriorate with moisture exposure.
Can waterproof gyprock be used in direct water contact areas (shower enclosure)?
Waterproof gyprock resists high humidity, but in areas of direct and continuous water contact (inside a shower) additional waterproofing and tile finish over the board are recommended. Using KNAUF GKBI13 with a waterproof membrane ensures long-term durability.
What is the thickness and material of KNAUF GKBI13 waterproof gyprock?
KNAUF GKBI13 has a gypsum core with a water-resistant surface coating; typical installation thickness follows industry standard (commonly 12.5 mm). Exact thickness and materials are specified in the product technical data under GKBI13.
Is waterproof gyprock suitable as a tile backing?
Yes, KNAUF GKBI13 is suitable as a tile backing when the surface is primed and tiled with adhesives designed for moisture-resistant substrates. In areas of direct water contact, follow the manufacturer’s preparation guidelines and apply waterproofing.
What stud spacing is recommended for fixing waterproof gyprock?
For fixing waterproof gyprock, a stud spacing of 300–600 mm is generally recommended depending on board thickness and wall use. Confirm exact spacing with KNAUF GKBI13 installation instructions, especially when tiling or fitting heavy fixtures.
What accessories from top products are needed for installation?
For installation you need metal profiles and screws; top products include TULPA METALLSEIBID/50tk and KNAUF GKBI13 boards in various sizes. Use moisture-resistant screws, metal profiles and appropriate fixing plugs for a secure frame.
How to cut and fit waterproof gyprock without damaging the water-resistant layer?
Cut the board with a sharp knife along the marked line, snap along the score to avoid damaging the face; use a fine-tooth saw if needed. Treat cut edges and joints with sealant and appropriate primers where moisture protection is required.