Over the next few months I am renovating the rear of my house, adding external wall insulation (EWI) and replacing the fenestration. The house is a Victorian mid terrace, 3 storeys, 9″ solid brick walls and is unusual in that there’s no return/extension at the rear so it’s flat across the back making EWI much simpler (relatively!). The insulation will be 200mm NBT Diffutherm woodfibre with a lime render providing a breathable construction and will extend below the DPC. There will be 5 new windows and a door all Internorm triple glazed inward opening tilt and turn. All works will be airtight and minimise cold bridging where possible with a bespoke gutter to stradle the EWI. The scheme will benefit from a £6000 government grant under the Green Deal Home Improvement Fund (GDHIF), unfortunately now closed to new applicants. The next installment looks at the damage the cement render has done to the building fabric!
