Straw panels being fitted over an existing masonry house

Renovations + Additions · [location]

Masonry Retrofit

Compressed straw panels fitted over an existing masonry wall — an old house brought to passive-house-grade fabric without being demolished.

Type
External retrofit
Existing wall
Solid masonry
U-value after
[U-value] W/m²K
Completed
[year]

The build

The greenest house is usually the one already standing. Straw panels can be fixed to the outside of an existing masonry wall as an over-cladding, taking a leaky solid wall to a whole-wall U-value it could never reach from the inside — and doing it without losing a square metre of floor area.

Because the panels are prefabricated to the surveyed dimensions of the existing building, the wet trades stay off site. The house stays occupied through most of the work.

The project

Photographs from the build.

Full-height compressed-straw wall panels set in a timber grid
Full-height panels
Wall build-up showing the layers of the panel
The build-up
A crane lifting straw panels into place
Install day
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Begin your build

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