Will writes from Norwalk, Ohio: "I have 3.5 foil back insulation inside and brown board nailed to studs (1978) outside. Can I put three quarter inch foamular propink insulation board and sagebrush siding over this and not have a moisture problem or dry rot in the walls?"

Answer: Yes, you can use FOAMULAR® Insulation in this application. Make sure to penetrate to the wood studs when attaching the FOAMULAR Insulation. Also, make sure to penetrate the wood studs when attaching the siding.