The Corokitty 2 design is a bit easier to make.
Rather than cutting an inner and outer circle just wrap the Coroplast
around the exterior and place insulation foam on the inside to keep the kitty warm.
Corokitty 2 plywood template (Corokitty2_pattern_single)
Plywood – $20 to $40 for a 4′ x 8′ sheet ($2.00 – $4.00 per shelter))
Insulation foam – $12.00 for a 4′ x 8′ sheet (adds $3.00 to the cost of each)
Coroplast – $10.00 for a 4′ x 8′ sheet (add $2.50 per shelter)
Zip ties – $4.00 for a bag of 100
Wood sealer (if you plan on leaving it so it will be rained on) – $16.00 for a can
(prices for materials will vary depending on where you are located)
If you buy 4′ x 8′ materials you can make these for around $10.00 each
When working with insulation foam you’ll notice that it easily bends in the long direction (assuming you purchase a 48″ x 96″ sheet).
You’ll want to make sure that the 35″ side of the 17″ x 35″ piece is cut longways so you can bend it in the shelter.
You should be able to get 3 shelters from one sheet of insulation foam.
The picture below shows the shelter with pine shavings inside. I only recently found out about these and my backyard feral cat has been staying in it – so I think the pine shavings are a good way to go.