Cat House Design. A-Frame Cat House. A miniature cat house is seen here in white beside a small.

The standard lounging ledge is 16 x 20 inches and provides a loft. Insulated DIY Cat House by My Outdoor Plans. As you can see in top tip.
If you are one of them then you are at the right place.
Pick your favorite and get building. Line each wall by gluing on 1 25 cm thick foam insulation board from a home. Clear all your doubts and questions about a foam cooler bin house at Aspcapro. As simple as it is it should be able to stand up to the elements nicely.