Single glazed sash windows in Islington that needed secondary glazed sash windows behind them to meet the u value

March 10, 2019

By Christopher Richard

Home » » Single glazed sash windows in Islington that needed secondary glazed sash windows behind them to meet the u value

Single glazed sash windows in Islington that needed secondary glazed sash windows behind them to meet the u value

Single glazed sash windows in Islington that needed secondary glazed sash windows behind them to meet the u value

How secondary glazed sash windows were used by Islington council to sign off an incorrect install in a conservation area