roof insulation

[grego]

I am planning not to drywall the inside roof area of the new garage and leave it open.
I have heard good things about the silver bubble wrap type inside roof insulation. So I went down to Lowes and HD and found the stuff I need but then saw a roll of silver foil stuff in a 4' x 125' roll that doesn't have the bubble wrap in between the layers of foil. Is this stuff just as good?
My garage is 22' x 24' with 10' walls btw if that info is needed.

 

[CenTex52Chevy]

I'm leaving my garage open to the roof also.

The silver foil stuff sounds like radiant barrier, it should be just as good ( or better) as the stuff with bubble wrap in the middle. Look for the type that has tiny perferation in it, you don't want the solid stuff it acts like at vapor barrier.

There are several sites on radiant barrier installation that you my want to check out. They offer good information on how to install and what to expect from it.

As always just my opinion, others will surely chime in on the subject.

 

[GearBeer]

So, let me get this straight before I comment. You're leaving the ceiling open and "insulating" the roof itself with the silver radiant barrier. Is that right?

Are you heating the garage? If so, how?

 

[grego]

Yes that is correct, attaching the radiant barrier to the roof.
No heat really, it gets cold here in Sacramento/ northern California, but nothing a jacket or flannel work shirt won't fix. Can't complain that it gets cold compared to other parts of the country that has feet's of snow on the ground.

 

[grego]

I'm leaving my garage open to the roof also.

The silver foil stuff sounds like radiant barrier, it should be just as good ( or better) as the stuff with bubble wrap in the middle. Look for the type that has tiny perferation in it, you don't want the solid stuff it acts like at vapor barrier.

There are several sites on radiant barrier installation that you my want to check out. They offer good information on how to install and what to expect from it.

As always just my opinion, others will surely chime in on the subject.

Do you have the websites or do I just google it? I can be distracted very easy.

The bubble wrap stuff has foil on both sides of it, any better than the foil only type?

 

[ni[x]it]

This is the stuff I used on my home;
http://www.energyefficientsolutions.com/
Arma-Foil


I purchased 4,000 square feet of it, and stapled it to the underside of my roof rafters.
You'll want to have some kind of ventillation (soffit vents) down low, and whirly birds or roof peak ventillation, to allow the trapped hot air to flow out the top.

For my home, it reduced our annual average energy consumption by 17% over the last year and a half. I haven't had a chance to add more insulation yet (currently blown in cellulose at only 3-5"). I did add plenty of soffit vents tho, to go along with existing roof peak ventilation.

For your garage, you will significantly reduced radiant heat. But it wont 'insulate'.

 

[GearBeer]

Typically I don't endorse these radiant "insulation" solutions, but I think it's appropriate in your situation. You might also benefit from a circulation fan to push the hot air down to you (hell, knock a box fan over in the rafters).

 

[CenTex52Chevy]

Grego,

Google will get you a lot of results for radiant barriers. Here is one of the site I have bookmarked.

http://www.radiantguard.com/?PageAction=VIEWPROD&ProdID=24