Insulation calculator
Work out how many rolls or boards of insulation you need for a job. Enter the area and choose the product.
Work out your insulation
Enter the area to insulate and choose the product.
rolls or boards needed, wastage included
Otis pulls the right insulation and quantity for the job and prices it on your live stock.
Coverage figures are typical for the products shown and vary by brand. A 5 percent wastage allowance is included. An estimate, always confirm with your merchant.
How the numbers work
The calculator divides the area you are insulating by the coverage of one roll or board, adds a small wastage allowance and rounds up to whole packs.
Coverage varies by brand and thickness, so treat it as a guide and check the pack label. For a firm order, a merchant running Otis confirms the exact product and quantity on live stock.
This is what Otis does, instantly
A calculator works out quantities. Otis takes a customer question, works out the materials, checks live stock and pricing in the merchant’s own system, builds the quote and takes the order, day or night.
Common questions
How much insulation do I need?
Divide the area by the coverage of one roll or board and round up, allowing a little for wastage. This tool does that for common products.
What thickness should I use?
It depends on where you are insulating and the standard you are meeting. Thicker material covers less area per roll, which this tool accounts for.
Loft roll or PIR board?
Loft rolls suit joists and open spaces, PIR boards suit walls, floors and where space is tight. Choose the product in the tool to match.
Should I add extra?
Yes, a small allowance covers cuts and awkward spaces. The tool includes a 5 percent margin.
More trade calculators
See Otis quote the full job
Insulation, boards and fixings together, priced on your live stock in seconds.