Dot and dab calculator: adhesive bags per board
The calculator needs JavaScript. The worked example, formula and figures below show exactly how it works, so you can do the sum yourself. A guide, not advice. Check your supplier's or maker's figures before ordering.
Short answer
Worked example
| You enter | Value |
|---|---|
| Start from | Number of boards |
| Boards | 12 |
| The wall is uneven | No |
| Boards per bag on a flat wall | 3 boards |
Order: 4 bags of board adhesive for 12 boards
| Result | Value |
|---|---|
| Adhesive bags | 4 |
| Boards | 12 |
Show the working
- Adhesive: 12 boards ÷ 3 boards per bag, rounded up = 4
How it works
- From a wall area: boards = area after openings × (1 + waste) ÷ board area, rounded up
- Bags = boards ÷ boards per bag (the maker's figure for a flat or an uneven wall), rounded up
Thermal (insulated) boards need mechanical fixings as well as adhesive: follow the board maker's fixing guide for the number and type.
Uneven walls take more adhesive per board: use the maker's figure for your wall, or pack out first.
Our default (adjustable)
These are typical planning figures and our own allowances, not facts about your product. Change any of them in the calculator to match your bag, pack or tin.
| Figure | Our default (adjustable) | Kind | Source |
|---|---|---|---|
| Board waste allowance | 10 % | Our assumption Not yet checked against the source | Our choice: change it to suit your job Cuts and offcuts. |