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Thanks. Thing is if I am going to tear up the floorboards, necessary to place new stuff over the old, I may as well remove the old stuff.
Why?
If you are not going to change to a different type of insulation, there is absolutely no reason to remove fiberglass insulation and replace it with more fiberglass insulation. If you want to add more insualtion, just add it on top. If you do not want to increase the thickness of the insulation, then do not do anything. It makes no sense to remove the bottom layer, reaplce the bottom layer with a new bottom layer of the same meterial and then add a top layer.
If you just want to get rid of some excess money, I can give you an address to send it to.
By the way, you can have additional insulation blown in without removing all of the floor boards. You can have them blow in either cellulose or fiberglass. cellulose insulates much better than fiberglass, but costs more.
If you are not going to change to a different type of insulation, there is absolutely no reason to remove fiberglass insulation and replace it with more fiberglass insulation. If you want to add more insualtion, just add it on top. If you do not want to increase the thickness of the insulation, then do not do anything. It makes no sense to remove the bottom layer, reaplce the bottom layer with a new bottom layer of the same meterial and then add a top layer.
If you just want to get rid of some excess money, I can give you an address to send it to.
LOL!
So what you are saying is that fiberglass insulation does not lose any resistance value with age? The fact that it is wrapped, not backed, in paper does not make it less effective.
The side of the house it covers is quite cooler than the side with the same amount of newer, pink insulation.
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Quote:
Originally Posted by Moth
LOL!
So what you are saying is that fiberglass insulation does not lose any resistance value with age? The fact that it is wrapped, not backed, in paper does not make it less effective.
The side of the house it covers is quite cooler than the side with the same amount of newer, pink insulation.
The fiberglass is just as good as it ever was, the issue with the older stuff is that it compresses over time. The thinner it gets the less airspace it has the lower the R value.
Is the entire attic area planked? I would definitely think about taking old stuff out if I had to do some serious pry-bar work, but I would probably stop thinking about it after I removed the first two batts and suddenly could not see my hand in front of my face for all the dust that I just kicked up. Also, if your house is like mine, anything you take out of the attic has to go through the house before it finds its way into the dumpster. There's a lot of potential for difficult clean-up and furious women.
It sounds like blowing new fiberglass on top of the old may be your best bet. I would probably avoid cellulose. It may insulate better, but stabilized and fireproofed or not, it will never be as stable, waterproof, mold-proof and fireproof as fiberglass.
The fiberglass is just as good as it ever was, the issue with the older stuff is that it compresses over time. The thinner it gets the less airspace it has the lower the R value.
Is the entire attic area planked? I would definitely think about taking old stuff out if I had to do some serious pry-bar work, but I would probably stop thinking about it after I removed the first two batts and suddenly could not see my hand in front of my face for all the dust that I just kicked up. Also, if your house is like mine, anything you take out of the attic has to go through the house before it finds its way into the dumpster. There's a lot of potential for difficult clean-up and furious women.
It sounds like blowing new fiberglass on top of the old may be your best bet. I would probably avoid cellulose. It may insulate better, but stabilized and fireproofed or not, it will never be as stable, waterproof, mold-proof and fireproof as fiberglass.
Half of the attic, the half with the old, yellow stuff, is planked. The other half, with the newer pink, is not. The side with the pink is much warmer than the side with the yellow.
I realize its a messy job. But I think sealing it in large, garbage bags will do the trick. I will also use a shop vac. I have a good ventilator mask and will dress appropriatly.
The difference in warmth between the two sides is just too great. And that yellow stuff looks like D-Day.
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