Quoin / Corner Brick Calculator

How the quoin / corner brick calculator works

Calculates extra bricks needed for quoins and corner details. The calculator takes your dimensions and supplier rates, applies a standard UK trade formula, and returns a quantity with an indicative cost. Every figure is an estimate — site conditions always move the final number.

Typical UK masonry and brickwork wastage

Typical UK brickwork wastage is 5%, rising to 10% for Flemish bond or similar decorative patterns. Blockwork at 5–7% is adequate for straightforward walling. Our defaults reflect common UK trade allowances, and can be adjusted upwards for non-standard geometry or downwards where experience supports a lower figure.

What this tool does not do

It does not replace a professional quote, factor regional pricing, assess structural adequacy, or confirm Building Regulations compliance. Those remain the responsibility of a suitably qualified designer, surveyor, or your building control officer.

On-site considerations for quoin / corner brick

Wet weather delays mortar curing and can wash out joints — protect fresh work with hessian or plastic. Don't lay below 3°C without accelerator or winter mix.

Building Regulations and compliance

Loadbearing masonry is covered by Approved Document A and BS 5628. Cavity wall ties, DPC, and cavity trays are all Building Regs items, not optional. When in doubt, a pre-application enquiry to the local authority can give early clarity, which tends to be less costly than retrospective correction.

Before you order

Order bricks by the pack and keep them dry on pallets. Wet bricks will leach salts to the face and leave permanent staining. Cross-checking the calculator’s output against a supplier quote helps catch differences in pricing assumptions — ask for exact product specifications (grade, finish, batch number) and confirm delivery timescales against your programme.

Adjusting the defaults

Every input in this calculator is editable. Enter your own dimensions, supplier prices, and wastage allowance — the output recalculates instantly. If the defaults feel off for your region or project type, your own numbers always override them.

Using this quoin / corner brick calculator alongside other BuildMetricLab tools

This calculator works best as part of a planning workflow. Pair the quantity with our project contingency, labour-hours, and material-cost calculators to build a complete estimate before you pick up the phone to a supplier. All BuildMetricLab tools run entirely in your browser — no sign-up, no data sent anywhere, and every formula is shown on-page so you can audit the maths.