The timber stud around the windows to form the reveal were set approximately 20 degrees out of square to give us a splay detail as described previously.
Because of the limited timber section on the windows, fixing the plaster board proved difficult. The solution was to fit a 10mm timber bearer around the perimeter of the windows. Plaster board could be carefully fixed to this and the timber stud after insulation was stuffed behind the reveal board.
The MDF window boards were secured in a similar manner.
The same situation occurred on the front elevation windows where the timber section was exceptionally limited. The solution was to solvent fix white tile trim along the perimeter. This would allow plaster board to be trapped at this point and secured to the timber stud.
The sealing and air tightness work has taken a considerable amount of time, much more than anticipated. The manual labour element of ensuring air tightness continuity and sealing/patching can account for much of the time, as well as additions discovered when stripping out the property.
There has been a continuous learning process for the project team and operatives. They now have a greater appreciation of what and why it is being done, than they did before starting on site.
A demonstration 'Passiv Haus' retrofit project at Cottesmore Road, Leicester. We are part of the Technology Strategy Board's Retrofit for the Future competition aiming to achieve Passiv Haus energy standards for a variety of different property types and methods of construction.
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