What is the relative insulation and advantages of block versus frame houses?
We have done considerable modeling of homes, as well as monitoring many homes. We ran a number of lab experiments during the 1980s. The bottom line is that in Florida there are other components of the home that one should concentrate on before the walls, such as window shading and roofs (see our Priorities page). Block versus frame – the important item is that either construction can be done well. With block, we generally recommend an insulation level of R-5 or more in Florida. Usually, it is installed adjacent to the block and then a 3/4-inch air space is furred out on the inside. Make sure the top of this air space is blocked off from the attic. With frame walls, the concern is good insulation installation and reducing air infiltration. Seal gaps (especially in the wall top plates where electrical and plumbing penetrates) and make sure insulation is cut correctly. If it is cut too long, it tends to bend. If it is cut too short, it doesn’t cover the gaps. For specific detailed drawing
We have done considerable modeling of homes, as well as monitoring many homes. We ran a number of lab experiments during the 1980s. The bottom line is that in Florida there are other components of the home that one should concentrate on before the walls, such as window shading and roofs (see our Priorities page). Block versus frame – the important item is that either construction can be done well. With block, we generally recommend an insulation level of R-5 or more in Florida. Usually, it is installed adjacent to the block and then a 3/4-inch air space is furred out on the inside. Make sure the top of this air space is blocked off from the attic. With frame walls, the concern is good insulation installation and reducing air infiltration. Seal gaps (especially in the wall top plates where electrical and plumbing penetrates) and make sure insulation is cut correctly. If it is cut too long, it tends to bend. If it is cut too short, it doesn’t cover the gaps. For specific detailed drawing
