Calculation tools and useful websites

below are a variety of links to external websites, a water efficiency calculator, area weighted U value calculator and other useful tools relating to building control and building regulations.

U value calculators and water efficiency calculator

• calculator for masonry walls
• value calculator for various construction types
• water efficiency calculator tool (Excel Spreadsheet, 0.71 Mb)
• Area Weighted U Value Calculator 2010 (Excel Spreadsheet, 0.11 Mb)

Thermal insulation guidance

• PROCTOR insulation product details and installation guides
• ECOTHERM insulation product details and installation guides 
• XTRATHERM insulation product details and installation guides
• CELOTEX insulation product details and installation guides
• QUINN insulation product details and installation guides
• KNAUF insulation product details and installation guides
• WEB DYNAMICS multi foil insulation
• RECTICEL insulation boards

Approved documents

• Download the approved documents from the planning portal

• Accredited construction details for Approved Document Land thermal bridges

 For more information and useful links

• the British Federation Rating Council (BFRC)
• guide to Fire Resistant Glazing
• Construction Products Association - Loft Conversion Project Guide
• Lead Development Association website
• Visit Severn Trent Water 
• ready-made building contracts for homeowners
• Download FREE Federation of Master Builders FMB Plain English Contracts