Pressure-Treated Foundation Repair Pressure- Treated Foundation Repair Permanent wood foundation (PWF) systems have some advantages for new construction. The cost is comparable to laying up block walls, but a PWF can be erected year-round by the same crew that frames the house. It's also easier to insulate and apply finishes to a pressure- treated foundation. But those of us in the remodeling end of the industry don't need to feel left out in the cold. Certain types of renovation projects lend themselves to a PWF, as I recently discovered when I contracted to rebuild an attached garage. The garage had been a do-it-yourself project for the previous owner, and the unreinforced 8- inch block walls had cracked and bowed inward severely due to