Wallcoverings
Wallpaper paste packets and mixing water
- where
- packets of paste
- rolls to hang
- rolls per packet
- total mixing water (L)
- water per packet (L)
Explain this equation
Works out how many packets of wallpaper paste to buy and the water to mix them.
Each packet hangs a stated number of rolls at the strength for that paper. Rolls divided by that, rounded up, gives packets; each packet takes a set amount of water.
Simple division and multiplication.
Sense check: 8 rolls at 5 rolls per packet needs 2 packets, about 7 litres of water.
Watch out: heavy papers need a stronger mix, so fewer rolls per packet. Check the packet's table for the paper weight.
Works out packets of paste and the water to mix them, from the number of rolls and the figures on the packet.
Enter your values to see the result.
Good to know
The packet gives both figures, and they change with the paper. One UK paste data sheet gives, per sachet: normal papers 3.5 L water for 4–5 rolls; vinyls 3 L for 4 rolls; embossed (Anaglypta) 2.5 L for 2–2½ rolls; heavy embossed fewer rolls again. Heavy papers need thicker paste so a packet does fewer rolls. Paste-the-wall papers need the specific paste the maker states.
Common mistake
Mixing heavy embossed or vinyl papers with thin “normal paper” paste, which lets seams lift as it dries.
Limits
Follow the paper maker’s paste recommendation and soaking time first.
Sources
- Palace Chemicals (Langlow), Wallpaper paste technical data sheet (per sachet: normal papers 3.5 L water, 4–5 rolls; vinyls 3 L, 4 rolls; Anaglypta 2.5 L, 2–2½ rolls)
- BS 8000-12 Workmanship on construction sites. Code of practice for decorative wallcoverings and painting
Results are calculations from the published methods and figures shown, and depend on the data you enter. Coverage depends on the product, surface and application. Always follow the paint and wallcovering manufacturers’ data sheets and BS 6150 / BS 8000-12. Check prices and VAT with your own records and HMRC.