Garage insulation?

[Depwraith]

Had a new garage built recently near Tampa. Still need to insulate it before I have drywall thrown up. Kinda want to keep the ceiling exposed for storage so was wondering what insulation to use? Was looking at the water blown...but not sure on cost. The garage is only 20X20 with 10ft walls and was thinking maybe might do the walls the same way if its worth it? Any suggestions would be great as this certainly isn't my area of expertise!

 

[green2kgt]

check out mine. I used R13 rolls for the walls then 7/16" plywood. ceiling is the R30 bats. I had to use R13 in the middle b/c there was already some plywood above the trusses. mine is a 24x24.

http://www.garagejournal.com/forum/showthread.php?t=214178

mine also houses a Mustang a bike!

 

[p_mori7]

Edit your post to resize your pictures please.

Post the links one under another with a line space in between please.

That will make viewing more enjoyable for everybody.

Postimage.org makes it real easy.

 

[Depwraith]

Edit your post to resize your pictures please.

Post the links one under another with a line space in between please.

That will make viewing more enjoyable for everybody.

Postimage.org makes it real easy.

Spaced them out, hope that helps. Posted using tapatalk and their image server, it's really easy as it's native to the app.

 

[p_mori7]

Looks perfect now, thanks !

As stated above:

- R13 batts in the stud cavities.
- R30 batts in the cieling cavities (R20 minimum).

 

[jvitez]

To keep the rafters open and keep the heat out as you're in Florida, I'd have polyurethane spray foam insulation blown onto the underside of the roof sheathing. No worries about a ventilated attic space then, you'll keep the heat out, and the rafters will be free for storage.

You can then use any type of insulation in the wall, cheapest being fibreglass batts, much better being rock wool batts, best being spray foam. A spray foam contractor might give you a better price if you were to do the whole garage at the same time. For a 20x20 it would be a surprisingly quick job.

 

[green2kgt]

To keep the rafters open and keep the heat out as you're in Florida, I'd have polyurethane spray foam insulation blown onto the underside of the roof sheathing. No worries about a ventilated attic space then, you'll keep the heat out, and the rafters will be free for storage.

You can then use any type of insulation in the wall, cheapest being fibreglass batts, much better being rock wool batts, best being spray foam. A spray foam contractor might give you a better price if you were to do the whole garage at the same time. For a 20x20 it would be a surprisingly quick job.

the one thing I wanted to point out is that batts are a lot more expensive than rolls. Takes only a minute to measure and cut to length each strip. Buying rolls saves you hundreds in a garage his size. Mine is 24x24 and it saved me that much. Took a weekend to just do the wall insulation but its worth it when you do it yourself and save the money.

 

[NUTTSGT]

the one thing I wanted to point out is that batts are a lot more expensive than rolls. Takes only a minute to measure and cut to length each strip. Buying rolls saves you hundreds in a garage his size. Mine is 24x24 and it saved me that much. Took a weekend to just do the wall insulation but its worth it when you do it yourself and save the money.

You make a good point, especially when your walls are not a size that batts come in. That's one of the reasons that I like the Owens-Corning mini rolls, if you're doing it a little by little. At about $10 each, you can buy one or two at a time and not have a serious initial cash outlay.

On the other hand, if you want to do it all at one once, I'd buy the bigger rolls or whatever is the most cost effective.

 

[NUTTSGT]

Before you insulate, make sure all your wiring is done if you want it in the walls.

While I realize you want to use the trusses as storage, have you considered just using a attic access panel in the ceiling ? It will allow you to put up a ceiling, paint it white (more light reflective) and have a cleaner look.

An access panel that fits between the bottom chords of the trusses (22") and 48" long will allow plenty of access. Done right, you can also use a pull down attic ladder.

 

[Scott H in Wheaton]

Before you insulate, make sure all your wiring is done if you want it in the walls.

While I realize you want to use the trusses as storage, have you considered just using a attic access panel in the ceiling ? It will allow you to put up a ceiling, paint it white (more light reflective) and have a cleaner look.

An access panel that fits between the bottom chords of the trusses (22") and 48" long will allow plenty of access. Done right, you can also use a pull down attic ladder.

Very good info here... did the same in my garage, love my aluminum pull-down stairs

 

[green2kgt]

You make a good point, especially when your walls are not a size that batts come in. That's one of the reasons that I like the Owens-Corning mini rolls, if you're doing it a little by little. At about $10 each, you can buy one or two at a time and not have a serious initial cash outlay.

On the other hand, if you want to do it all at one once, I'd buy the bigger rolls or whatever is the most cost effective.

The $10 rolls, I only needed 15-16 to do all my walls (again 24'x24'x10') so it was only around 160 -170 bucks plus a hammer stapler and staples. I bought a bunch of OSB with it for the walls and put it on my Home Depot card with 12 mo no interest. I just noticed that Lowes has 7/16" OSB for only $8 a sheet right now here in Ohio. That's the cheapest ive seen it in a while. and all 16 rolls fit in my 2013 Sonata!! haha. It was packed... trunk, backseats, and front seat along with a ceiling fan!! I am doing all my electrical inside my garage, not inside the walls so mine was fairly easy! Worst part was getting everything moved to inside the walls as I was putting up the insulation and OSB.

and just so everyone knows, Home Depot is doing lots of tax return things with insulation, doors, and windows. Keep the receipts if you buy the rolls and turn it in with your taxes and you get 10% back. With everything I bought ill get around 30-40 bucks back at least.

 

[green2kgt]

Very good info here... did the same in my garage, love my aluminum pull-down stairs

do u have a link to the stair set up u bought?

 

[NUTTSGT]

The $10 rolls, I only needed 15-16 to do all my walls (again 24'x24'x10') so it was only around 160 -170 bucks plus a hammer stapler and staples. I bought a bunch of OS with it for the walls and put it on my Home Depot card with 12 mo no interest. I just noticed that Lowes has 7/16" OSB for only $8 a sheet right now here in Ohio. That's the cheapest ive seen it in a while. and all 16 rolls fit in my 2013 Sonata!! haha. It was packed... trunk, backseats, and front seat along with a ceiling fan!! I am doing all my electrical inside my garage, not inside the walls so mine was fairly easy! Worst part was getting everything moved to inside the walls as I was putting up the insulation and OSB.

$8/sheet of OSB Using your HD card for the interest free period is one thing I do when I work on projects. As long as you pay it off before the 12 months is up, it's interest free. . .. use somebody else's money.

 

[dtep]

To keep the rafters open and keep the heat out as you're in Florida, I'd have polyurethane spray foam insulation blown onto the underside of the roof sheathing.

I've been told that you need some airspace between the sheathing and your insulation so that you don't cook your shingles and shorten their lifespan. I just had my garage insulated and the guy put R-19 fiberglass on the 2x10 trusses under the roof sheathing. I'm guessing that leaves about 4 inches of airspace which is way more than you would get if you put up baffles. The guy said that the extra airflow, even with less insulation than what could fit in there, would keep the attic cooler and it would be cheaper than baffles and more insulation. We've had some awfully hot and sunny days since and I'm amazed at how little the attic heats up.

 

[Falcon67]

$8/sheet of OSB

Cheap - was $15 not that long ago.

 

[green2kgt]

I've been told that you need some airspace between the sheathing and your insulation so that you don't cook your shingles and shorten their lifespan. I just had my garage insulated and the guy put R-19 fiberglass on the 2x10 trusses under the roof sheathing. I'm guessing that leaves about 4 inches of airspace which is way more than you would get if you put up baffles. The guy said that the extra airflow, even with less insulation than what could fit in there, would keep the attic cooler and it would be cheaper than baffles and more insulation. We've had some awfully hot and sunny days since and I'm amazed at how little the attic heats up.

that seems like a good idea instead of buying baffles too! if you have that big of joists!

$8/sheet of OSB Using your HD card for the interest free period is one thing I do when I work on projects. As long as you pay it off before the 12 months is up, it's interest free. . .. use somebody else's money.

it will def be paid off in 12 months. I wasn't going to turn it down. Ive put 2 separate $300 amounts on it. each gets the 12 mo 0%. I had a total of $260 and I wanted to spend $300 to get the 0% and the cashier told me to get a gift card for the $40 and get something later. Luckily I did b/c that's what I used on my latest purchase of $8 OSB!! lol.

Cheap - was $15 not that long ago.

yes it was. I seen it the other day it was still $8 and grabbed about 8 more sheets. It was 8.65 at HD and 7.98 at lowes.

 

[Mystic_Cobra]

do u have a link to the stair set up u bought?

Ditto. About that ladder??

I'm looking to add one to my attic area.

 

[Mystic_Cobra]

And... DUDE. Loving the GT500!

 

[green2kgt]

Ditto. About that ladder??

I'm looking to add one to my attic area.

i ended up buying the 160 Louisville metal pull down from lowes with gas shocks and its awesome!!!!!!!!!!!!!!!!!!!!

 

[03HD-F150]

That 13 shelby is totally bad ***!

 

[Mystic_Cobra]

Someone asked about the ladder. I just installed the Louisville 375 lb aluminum 25.5"x54". I had to do a little extra work with the framing but I wanted the extra width. Got it from Lowes for less than $200.