For Jenny and Dave Marrs’s latest project, the HGTV duo built the ultimate room for feline fans: a catio, aka a patio for ...

and to keep all the poky mesh staples on the outside. She inspects her catio semi-annually to make sure it’s still in good condition and doesn’t need any repair, and that no predators can get in.

In general, catios are made using galvanized wire, polycarbonate mesh, and rot-resistant wood. “The wood can be painted or stained to complement a house, but it’s important to use pet-friendly ...