DEAR TIM: I am currently installing rigid foam insulation around the exterior of my foundation. I’m installing three inches of it to a depth of 10 to 13 inches below grade to keep the heat in and the ...

Question: I have a room with a crawlspace under it about 20 inches high. The room has 12-inch floor joists, with rolled batt insulation. I’d like to insulate the block walls to reduce the amount of ...

Question: I have an 1860s Victorian home. The current walls, from inside to outside, are comprised of plaster, lath, cavity of nothing, horizontal barn boards, black tar paper, wood siding, and paint.