Calculation Tools and Links to Useful Websites

U Value Calculators and Water Efficiency Calculator and  links

• water efficiency calculator tool (Excel Spreadsheet, 0.71 Mb) Excel spreadsheet that allows calculation to demonstrate water efficiency in relation to Approved Document G 2009.

• Area Weighted U Value Calculator 2010 (Excel Spreadsheet, 0.11 Mb) Excel spreadsheet that allows calculations to demonstrate a more flexible design particularly useful for extension with excessive glazing.

• http://www.cba-blocks.org.uk/tech/tech_uvalue.html  Concrete Block Association calculator for masonry walls, simple to use.

• http://www.celotex.co.uk/Other-Resources/U-value-Calculator  Celotex U value calculator for various construction types, easy to use.

Thermal Insulation Guidance

• http://www.ecotherm.co.uk/our_products.aspx   ECOTHERM insulation including installation guides 
• http://www.xtratherm.com/products/products.php XTRATHERM insulation including installation guides
• http://www.celotex.co.uk/ CELOTEX insulation including installation guides
• http://www.insulation.kingspan.com/uk/index.htm KINGSPAN insulation including installation guides
• http://www.quinn-therm.com/roofinsulation/roof-insulation.cfm  QUINN insulation including installation guides
• http://www.jablite.co.uk/insulation/index.php JABLITE insulation including installation guides
• http://www.knaufinsulation.co.uk/  KNAUF insulation including installation guides
• http://www.rockwool.co.uk/product+guide/residential/residential+solution+guide Rockwool insulation including installation guides
• http://www.webdynamics.co.uk/more_info.asp?current_id=62  web dynamics multi foil insulation
• http://www.ybsinsulation.com/products_roof_superquilt.htm YBS insulation multi foil insulation
• http://www.recticelinsulation.co.uk/application/house-building Recticel insulation boards

Approved Documents

• http://www.planningportal.gov.uk/buildingregulations/approveddocuments/  Download the approved documents from the planning portal free of charge

• http://www.planningportal.gov.uk/buildingregulations/approveddocuments/partl/bcassociateddocuments9/acd  Accredited construction details for Approved Document L and thermal bridges

Windows and Glazing (Thermal and Fire Glazing)

• http://www.bfrc.org/Consumer/search.aspx BFRC link, this is the UK's national system for rating Energy Efficient Windows, find windows rated from A-G and details of companies who provide them.
• http://www.ggf.org.uk/frrg.aspx  Link to Glass and Glazing Federation guide to Fire Resistant Glazing

Loft Conversion Project Guide 2010

• http://www.constructionproducts.org.uk/publications/Page.aspx?Id=509 Loft project guide easy to use guide, very comprehensive document, download as a free PDF copy or purchase a hard copy.  Construction products association.

Lead Sheet Details

• http://www.leadsheetassociation.org.uk/free-information-sheets  Technical information form the Lead development Association

Sewers and Building Work (Build Over Agreements)

• http://www.stwater.co.uk/category/69   Guide to building over sewers includes a download area of application forms and guidance.

Legal Contracts for Domestic Extensions

• http://www.homeownercontracts.com/  JCT Homeowner Contractsare ready-made, down loadable building contracts you can fill in on screen and print off at home.
• http://www.fmb.org.uk/find-a-builder/free-contracts/ Federation of Master Builders Download FREE FMB Plain English Contracts