How can you insulate my walls without removing the siding, or interior finished wall?

We typically only need to remove one row of siding to access the wall cavities. We carefully remove a row of siding and drill a hole in each stud bay. We insert a tube into these holes and inject high R-Value Retro Foam insulation into the bays. Not only does this increase the thermal resistance of the wall, but it creates a better air barrier against unwanted air exchange between inside and out.

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