It’s time to insulate the roof. You’ve got a couple of options…
1) You can use Extruded Polystyrene Insulation (EPS) in the entire roof. You’ll have to kerf the EPS to bend it around the curves
2) You can use R-tech insulation which bends around curves easily, but costs a little more
3) You can use both of the above.
If you decide to kerf the EPS to bend it around the curves, you’ll want to kerf it about 3/8” deep every ½” or so. You can do this easily on the table saw.
Test your insulation for fit. It should fit snugly.Once you got it fitting well, glue it in place with some titebond or some polyurethane glue. For the pieces that you bend around the curve, you can shoot some brads into the spars thru the insulation to keep it in place, or use some duct tape to keep it in place. You’ll have to remove the duct tape once the glue is dry.
Using a combination of EPS and R-tech, your insulated Generic Benroy will look something like this…
Don't forget to notch out your insulation for your wiring!
