Is there a disadvantage to using blown in insulation?

Answer 1

All types of insulation can have advantages and disadvantages. If you are considering blown in you might take a look at the sprayed foam type. It is easy to repair if it gets cut into or damaged, just run to any hardware store and pick up a can of foam and make your repair. It won't settle in the walls or go airborne if you disturb it after installation

Answer 2

Yes. It's a real mess if you ever need to go back into the insulated area for repairs or upgrades to pipes or wiring. For example, in an attic, you have to move all the blown insulation away from a junction box and joists to add new wiring. It never goes back like it was. With fiberglass, all you have to do is fold over the batt, do the work and put it back down. Blown insulation also settles over time and loses it effectiveness. Insulation works by trapping air. As it settles, it traps less air and is less effective.

Answer 3

Over time, it eventually settles. My buddy did a test just for the sake of getting a difinitive answer. Be build a section of wall w/ 2 x 6 and plexi glass. Over time, the blown-in insulation (initially filled the bay), settled about 50%. All of it settled to the bottom and left no insulation at the top. OC Pink is the way to go. It's itchy and doesn't taste like cotton candy, but it will keep you warm.

Answer 4

No fiberglass in thee house much easier to install, though most are paper based which means that if you live in a moist area, or your house is damp you can get mold growing on them causing health problems. I would recomend the two part sprayed in foam insulation. It is somewhat more expensive but seals the whole cavity and is impervious to water, also has a high R rating

Answer 5

It depends on what specific type, and where it is applied. The more you pay, usually the better it is.
http://www.cookingupculture.org/ai/blownInsulations.html
In walls on an existing house, you can save a lot of money by not needing to replace the wall board. In the attic it can save a lot of money by cutting down on your labor. The main disadvantage is you can't do the rafter area with it.
If you do decide to use the space, you can always lay decking over it.

Answer 6

I have that in my attic and hate it with a passion. I have to wear a respirator when I need to store stuff, because that blown in insulation constantly floats in the air like heavy dust.
If you chose this stuff, I don't see any problems with moisture as long as your roof is leak-free and vented properly.

Answer 7

It leaves a bad after taste

Answer 8

ya man its da air cavity dat keeps most heat from escaping an wen u use dat **** it fills da cavity leavin no air an its not as good.

Answer 9

It can be inconvenient if someday you want to use that space.