When selecting this option, know that the entire cat house will be insulated.
Our insulation is made in the USA and is a certified product. It is called LOW E reflective insulation. Most manufacturers of cat houses are spouting out R-Value numbers and frankly most of them don't even know what an R Value is. R-Value is the resistance to conductive heat flow. In dog houses, conduction is only 3 to 7 % of heat loss due to the small size of the cavity.
The biggest heat loss (during winter) and the largest heat gain (during summer) for cat houses is not a conductive factor but a radiation loss/gain through infrared radiation. Rather than getting into a scientific, hard to understand dissertation, simply think of it like a thermos bottle. It keeps cold things cold and hot things hot with a shallow reflective aluminum barrier. That is precisely what Blythe Wood Works LOW E reflective insulation does for a pet house. You may refer to our website's LOW E link.
LOW E is a Class A, Class I fire rated insulation made of pure reflective aluminum on both sides with a layer of closed cell polyethylene in the middle. It is non toxic and does not become brittle, crack, flake, or collapse with age.
A light weight mahogany plywood liner protects the inner cavity insulation from pet damage, ensuring long term durability.
The photo below shows the components of a typical insulated dog or cat house, 2 x 2 framing, a mahogany plywood liner, two ply foil LOW E insulation and clear A grade bevel siding.