For porous or rough surfaces, add approximately 20% to the first coat quantity. Complicated mouldings and fittings will require extra paint. Remember to measure doors, windows and other areas that may not be painted (width x height) and to subtract the square metreage from the overall job. Quantity of paint is calculated at 16 sq metres for conventional paint and 12 sq metres per litre for Dulux Once.
Please note that the paint calculator is a guide only. Some products do not cover at the rates specified in the calculator, so check the coverage rates for the product under the product list on this website, or check the can for accurate coverage rates.