Calculators & Tools
Online tools to help you specify the right products for your project. All calculations follow relevant British Standards.
Rainwater Calculator
Size your guttering correctly using BS EN 12056-3 standards
Drainage Calculator
Calculate pipe flow capacity and select the right underground drainage pipe size using Colebrook-White equation
Roofline Estimator
Estimate fascia, soffit, and trim quantities based on your house measurements — get an itemised materials list
Wall Panelling Calculator
Calculate panel quantities, trims, and adhesive for your project
Need More Complex Calculations?
For multi-section roofs, commercial projects, or complex drainage layouts, our technical team can provide detailed specifications and recommendations.
Contact Technical Support