Insulation - Do or Not to Do?!

[PI Lvr83]

I had a 16 x 24 barn type detached garage built in my backyard. I am in the process of painting the outside and getting estimates for closed cell foam on the inside. So far I was quoted $2200 and $1875 to coat the walls and ceiling with closed cell.

The outside is plywood, a Lowes vapor barrier, then Hardy Board.
The inside is open wood.

My plans are to someday make it a workshop. I plan on putting up peg board on most walls.

My question or two I have are: would it be best to just use roll in insulation since the garage is already sorta insulated with the siding?

What about the ceiling area, same choice? What is the majority used product in this forum for insulation??

Right now, in Florida it seems cool in the garage without any insulation but then again it is not in the middle of summer!

I don't want to spend a small fortune on a detached garage.

I just need advice...View media item 30660
View media item 30655
View media item 30652

 

[trbomax]

Where you are located I would put 3.5" loll in the walls and 5.5" in the cieling. NO vapor barior,you need the moisture to move both ways down there. The vapor retarder in the kraft paper and house wrap is more than enough.Then a 10k btu window air unit.I wouldnt put it in a window though,I would frame in a sleeve before you insulate.A ceiling fan about 2/3 of the way twords the wall oppisite the ac unit would be good too.

 

[pattenp]

The Lowe's vapor barrier is not a vapor barrier, it's building wrap and is a water/moisture barrier. Use regular kraft faced fiberglass batt insulation with the kraft face to the inside. The kraft face is the vapor barrier.

 

[NUTTSGT]

I would most definetly insulate it. Even though you are not using it currently, it's easier to do it now before you add the wall covering. When the time does come to use it, you will be thankful for the insulation.

Spending the money on spray foam would be nice if you have the extra cash but considering what it is and the use it's going to have, I think you will be okay with rolled fiberglass insulation. Just having the place insulated, it will help maintain a consistent temperature and prevent temperature swings . . . causes stuff to rust through condensation.

 

[Todd.Brock]

If you are going to use it as a work shop then insulate it. My neighbor saw how much I put into my shed last summer and asked if I was using it as a workshop. I said no its just a fancy home for the weed wacker. I have no plans to work in there so no insulation. It is vented though.

 

[PI Lvr83]

I went to Lowes and purchased one roll of insulation for the walls. It states it is R13 and is 32' long. would this be enough R13 for the walls?

I know I will have to purchase more rolls.

Is it wise to first caulk the insides of each section...where the 2 x 4's attach to the inside plywood before putting in the insulation?

What about my garage roll up door? I want to be able to use the door but I noticed it is not insulated. It is hurricane wind (150 mph) rated.
How do you insulate a garage door if at all?

Thanks again for all the advice,

Greg

View media item 30656

 

[NUTTSGT]

R13 is usually plenty for the walls under normal conditions with a 2x4 wall.

What is the construction of the garage door ? Most guys will cut rigid foam panelsto stick in the door sections. If you post up a picture of the garage door, it'll help the guys give you good information. You can also do a search on insulating garage doors as there have been threads on the subject.