Exterior insulation - easy R-40+ walls!

Insulation strapping + rain-screen

1x4 vertical strapping fastens 2” R-13.1 polyiso rigid board insulation sheets to the house by striking studs @ 24” o/c.

Vertical + horizontal strapping

We’re installing a vertical cedar siding so need a horizontal furring strip to attach to. This also builds out the rain screen nicely.

Climbing the walls

So far we’ve been able to run our first course of rain screen completely around the house and we’re preparing to move forward with the lower course of vertical siding as we close out the month.

Siding preview

Our house will have a mix of mostly vertical western red cedar siding + corrugated galvalume. This photo shows the nickel gap shiplap we treated with an iron oxide to encourage a weathered silver patina.