Find your roof ladder configuration
Roof ladder calculator
Enter the length you need along the roof slope. We will find a starter ladder and extensions, prioritising fewer added pieces and then the smallest excess length.
Your measurements
Measure along the slope from eaves to ridge, not vertically. We round your entry up to one decimal place (for example, 9.91 m becomes 10.0 m).
Start with your roof slope length.
Enter your measurement above to find your starter ladder and extensions.
Measure along the slope from eaves to ridge, then enter the length in metres.
Your configuration
Assembled length
Excess length
Your entry and displayed lengths round up to 0.1 m. We select products using their exact dimensions to cover your rounded entry. The message above gives the exact extra length in centimetres.
Total: (Ex VAT)
Current product prices. Any basket discounts, tax and delivery are calculated at checkout.