Triple glazed timber replacement windows for Manchester retrofit

An extensive house renovation in Manchester, to improve the comfort and energy efficiency of a 1950s red brick house with a 1990s extension, has recently been completed. Clients Alan and Monica were looking to transform the house into a warm and comfortable home and to reduce its energy consumption and carbon footprint.

The project involved the replacement of all windows and doors with 21°’s ULTRA triple glazed timber range, with a whole window U value of Uw 0.75 W/m2K.

Energy efficient renovation

Alan and Monica undertook considerable research before deciding what measures were needed for the project, including a survey from URBED and a Design Review with 21°’s Bill Butcher. After a lot of consideration they decided not to go for external or internal wall insulation or MVHR but undertook the following energy efficiency measures:

• Replacement of windows and doors throughout
• Timber floor replaced with an insulated concrete floor
• Cavity walls filled (and internal wall with cavity filled)
• Small porch extension and full insulation of porch
• Upping insulation levels where possible

In addition, other improvements were made to the house during the refurbishment:

• Moving of main bedroom from front of house to back of house
• Moving of ensuite from back of house to front of house
• Refurbishment of three bathrooms
• Complete rewire
• Complete re-plumb
• Complete re-plaster

Triple glazed timber windows & doors

The existing windows in the house were old and had been poorly maintained, with rotten frames and failed glazing. 21°’s ULTRA triple glazed timber entrance doors, outward opening casement windows and one large inward opening window, in RAL colour 6021 (external) and clear timber finish (internal), were chosen to replace them.