Sika’s Rmax Pro Select board is essentially dense foam insulation for walls in sheet form. It took this list’s top honors because it can be used indoors or out, is easy to cut and fit, and has ...

Q. I am currently installing rigid foam insulation around the exterior of my foundation. I’m installing 3 inches of it to a depth of 10-13 inches below grade to keep the heat in and the cold out.

SIPs are factory-made sandwiches of wood sheet material bonded to foam. A SIPs home has no conventional framing, but goes up like a house of cards, one panel at a time.

Custom longer panels also available. Alusion ™ Stabilized Aluminum Foam panels are buoyant, flame and corrosion resistant, and non-combustible with a flame rating of A1.