Insulation Calculator UK
We'll adjust units, stud spacings, and insulation ratings based on your region.
Select the part of the building you want to insulate.
Enter the total area directly, or calculate it from room dimensions.
Choose the spacing between your wall studs, ceiling joists, or floor joists.
Choose the thermal resistance level for your insulation. Higher values mean better performance.
Our free UK insulation calculator helps British homeowners determine insulation requirements in metric units with U-value and RSI ratings. Designed specifically for UK building standards and common construction methods.
Getting your insulation quantities right the first time saves money and multiple trips to the store. Our calculator takes the guesswork out of insulation planning by providing accurate estimates based on your specific project dimensions, stud spacing, and target R-value. Whether you are a DIY homeowner or a professional contractor, this tool streamlines the estimation process.
UK Building Regulations recommend at least 270mm of mineral wool loft insulation to achieve the required thermal performance. Measure your loft area in square metres and our calculator will estimate the rolls needed.
UK Part L Building Regulations require new walls to achieve a U-value of 0.30 W/m2K or better. Retrofit projects should aim to improve existing U-values as much as practically possible.
Yes, cavity wall insulation can save UK homeowners approximately 150-300 GBP per year on heating bills. Most UK homes built between 1920 and 1990 have unfilled cavities that can be insulated.
Stay informed with expert tips on insulation, energy efficiency, and home improvement.
Proper home insulation is one of the most impactful upgrades you can make for energy efficiency. In this comprehensive guide, we cover everything from choosing the right insulation type—fiberglass batts, blown-in cellulose, spray foam—to understanding R-values and local building codes.
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R-value measures how well insulation resists heat flow. A higher R-value means better thermal performance and greater energy savings. But what R-value do you actually need? The answer depends on your climate zone and local building requirements.
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Your attic is the single biggest source of heat loss in most homes. Properly insulating it can reduce heating costs by up to 30%. From sealing air leaks around recessed lights to choosing between blown-in and batt insulation, these expert tips will help you.
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