Roofing system builder

EPDM Roof Calculator

Build your roof pack step by step. Choose your brand, roof shape, enter your size, add details and extras, then review your pack before checkout.

Choose your brand

Select the EPDM system you want to build your pack with.

Choose your roof shape

Select the roof shape that best matches your project.

Enter your roof size

Add the roof length and width, and we’ll preview the roof shape.

Your roof preview Visual guide only
Enter your size

We automatically add 0.30m total to the membrane size to allow for fitting.

Choose your edge types

Click each edge of the roof and choose what that side finishes into.

Click A, B, C or D to choose the edge type. These selections will automatically update your detail products.

Optional extras

Add optional extras to make installation easier.

Your pack

Review your pack before adding everything to cart.

Included in your pack

Total

£0.00 ex VAT
£0.00 inc VAT
✔ Sized for your roof
✔ Main materials included
✔ No membrane guesswork

This calculator is designed for a standard flat roof pack. For trims, outlets, wall details, corners or more complex roofs, contact us for a tailored quote.

Choose edge type

Select what this roof edge finishes into.