Batt verses block insulation
What are the pros and cons of batt verses foam block insulation? Wondering about batt being able to stand the rigors of going up and down highways without falling down in walls, cap, etc.
Forum Discussion
Batting type insulation is less expensive and easier to fit flush within various cavities. It won't fall down because you staple it in place. If you have a water leak, it will usually not be apparent right away, as the insulation soaks it up and wicks it away from the leaking area. Eventually though, it will become saturated and start to drip. Then you have a leak to repair, and nasty, moldy, soggy insulation to replace.
Styrofoam insulation has a higher cost, and is more difficult to fit snugly within the voids. I'd suggest using spray foam insulation to help seal up the spaces where the block foam doesn't seal well. Block foam insulation, being more rigid, will also transmit sound better than batting, therefor you'll notice outside noise and noise from room to room more. However, if you should have a leak, the Styrofoam does not absorb the water, so you will discover the problem sooner than later.
Styrofoam insulation has a higher cost, and is more difficult to fit snugly within the voids. I'd suggest using spray foam insulation to help seal up the spaces where the block foam doesn't seal well. Block foam insulation, being more rigid, will also transmit sound better than batting, therefor you'll notice outside noise and noise from room to room more. However, if you should have a leak, the Styrofoam does not absorb the water, so you will discover the problem sooner than later.
