Guides
Practical UK DIY guides to support your material calculations.
How much concrete for a shed base?
Calculate concrete for shed bases with depth guidance, waste allowances, and ready-mix vs bags advice.
How many bags of Postcrete per post?
Use the manufacturer's table to work out Postcrete bags for fence posts based on post size and hole dimensions.
Decking joist spacing guide
Standard 400mm centres, TDCA maximum spans by board size, and when to use closer spacing.
How many plasterboard sheets for a room?
Layout vs area methods, sheet sizes, and British Gypsum screw-fixing guidance for walls and ceilings.
Ready-mix or bags of concrete?
Choose after you have the volume. Sourced 20kg bag yields and Heidelberg waste guidance — no prices.