U-VALUE AND WHAT IT MEANS TO YOUR PROJECT

The following information summarised from Building Regulations Documents L1A (New Dwellings) 2010 & L1B (Existing Dwellings) 2010.

• Is it a replacement fitted into an existing frame? – Exempt from regulations

• Is it a replacement in an existing house with a new frame? – Maximum U-Value of 1.8 W/m2K (**see notes below)

• Is it an extension to an existing building? – Maximum U-Value of 1.8 W/m2K

• Is it a new build? – Maximum allowable 2.0 W/m2K (unless stated by your architect)

**This rule only applies when the door set forms a thermal break (eg. between your house and an unheated porch). See our full U Value Information page for more details.