Storing gypsum on site
Keep gypsum bags in a dry, covered space, protected from moisture and direct ground contact. Check damaged packaging before use and follow the storage instructions printed on the product.
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Keep the bags dry
Choose a covered space and a dry, stable base. Protect bags from floor moisture and roof leaks, and keep access routes clear.
Check dates and packaging
Read the production date, storage instructions and use-by information on the exact bag. Do not borrow another brand’s shelf life. Check torn, damp or lumpy bags before deciding whether they are suitable.
British Gypsum: storage and product instructions — General storage guidance; obtain this product’s shelf life from its packaging or manufacturer.
Practical site questions
How many square metres does a bag of gypsum cover?
Our undercoat benchmark is one 33 kg bag per 1.3 m² at 2 cm. Enter the actual wall and ceiling area, thickness and bag weight. Confirm the final quantity with your plasterer, allowing for surface unevenness and application.
Read more ←Mianeh black gypsum: application and pricing
Black/undercoat gypsum and ready-mixed gypsum-soil prepare and level walls and ceilings. This base coat is generally thicker than the white finishing coat used to create a smooth appearance before paint preparation. Specify the exact product when ordering.
Read more ←Micronized gypsum and undercoat: what is different?
Micronized describes powder fineness and processing. Undercoat describes a role in the first plaster layer. These terms describe different characteristics, and neither replaces a product data sheet.
Read more ←Plaster setting versus drying: when is it ready?
Setting and drying are different processes. A firm surface does not mean all moisture has left. Decide when to apply the next layer using the product instructions and actual site conditions.
Read more ←