Install
rigid insulation on top of the timber, and I'd probably use a liquid plastic as opposed to roofing felt.
Internally,
rigid insulation boards are fitted to the wall, or a stud wall is built and filled in with insulation material.
At the new site, we'll manufacture formulated systems for the footwear and automotive markets;
rigid insulation foam used in construction and cold chain applications; and simulated wood for the furniture market.
If this is your question, I don't see what adding
rigid insulation to the plywood walls would do to improve the situation.
David Robb, by email AI WOULD put
rigid insulation on the underside of the concrete and use insulation fixings to secure it.
Let's lay out the actors: the
rigid insulation manufacturers, the spray foam manufacturers, the fiberglass insulation manufacturers and the cellulose insulation manufacturers.
Roof Insulation Market by Application (Flat Roof, Pitched Roof), Type (Batts & Rolls,
Rigid Insulation, Spray Applied, Reflective Systems, Others), Material (Glass Wool, Stone Wool, Plastic Foam, Others), Region (Europe, North America, Asia Pacific, MEA, Latin America) - Global Forecast to 2021
You could remove the wardrobes and stick
rigid insulation to the back with a grab adhesive.
Instead, line the inside of the doghouse with an inch or more of
rigid insulation, then cover that with some type of chew-resistant material like hardboard or plywood.