Drywall and roof insulation

[ttimpe]

I got a couple questions, I am looking to make my garage a little more tolerable to work in, in the Midwest winters. I have one wall 8ft tall by 26.75ft long that has pegboard on it. Was gonna drywall it, already has insulation is it best to hand the drywall vertical or horizontal also heard it needs to be 1/2 off ground with a piece of plywood under it? Which is my best bet? Also have half a garage that the ceiling is finished but other is not I'm on a bi level with the part finished is under the house the other half is not and had roof over it with no insulation on it. Plus it has rafters going across it so can't drywall it. Is it OK to just put insulation up will this help keep it warmer?

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[JoeFin]

Yep it works out better to hang it horizontal

 

[GYPSY400]

Why can't you drywall the unfinished section?

In regards to insulation, if you go with Batt insulation , be sure to do a good job on the vapour barrier.. That will make the insulation much more effective.


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[ttimpe]

Why can't you drywall the unfinished section?

In regards to insulation, if you go with Batt insulation , be sure to do a good job on the vapour barrier.. That will make the insulation much more effective.


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Unfinished section you mean the roof area in the pictures? I can't get the drywall up there between the rafters

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[xtremek]

You're not going to try to put the insulation against the underside of the roof decking are you? I put the batt insulation on the bottom cord(? I think that's what you call them) of the trusses. Then I cut 1" squares out of old cereal boxes and stapled 5mil plastic to the trusses. Cardboard, plastic, truss. That way the plastic wouldn't pull through the staples. I left one area open and used engineered flooring sub floor laid on the trusses so I could still get access to the attic.

 

[dfiler2]

Your insulation and drywall would be hung from the bottom of the rafter cord, you would not want to put your insulation against the roof sheeting. You could also use a metal panel liner for your ceiling assuming the rafters have been designed for a ceiling. Hanging the drywall horizontally does give it a little more strength but assuming the garage sheeting has been properly applied I would put the drywall on vertically. The advantage is no **** seams, much easier to tape. Either way you would want to have the drywall up a 1/2" off the floor, you would not want any plywood under it. You could use a couple of plywood scraps to get your spacing. Finally yes, doing these things will keep the area much warmer and it will be worth it, just take your time and do the research.

 

[theoldwizard1]

Ceiling and lots of insulation - FIRST !

Most of your heat loss is UP !

 

[GYPSY400]

Unfinished section you mean the roof area in the pictures? I can't get the drywall up there between the rafters

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You will want to insulate between the rafters and drywall the underside.. Don't insulate under the roof unless you leave an airspace. ( the roof sheeting needs to be outside temperature so it doesn't condensate and rot). The ceiling needs to be double the R-value of the walls and everything needs good vapour barrier.. Like ziplock bag good.


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[ttimpe]

You will want to insulate between the rafters and drywall the underside.. Don't insulate under the roof unless you leave an airspace. ( the roof sheeting needs to be outside temperature so it doesn't condensate and rot). The ceiling needs to be double the R-value of the walls and everything needs good vapour barrier.. Like ziplock bag good.


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What if I don't want drywall cause there is no way to get it up there to the roof area with the rafters

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[ddawg16]

First off......Paragraphs.....makes your post much easier to read.....

Drywall....you almost always hang it perpendicular to the studs/joists. Get out the tape measure.....I doubt your studs or joists are 'exactly' 16" OC. Or, measure 4' from one stud to the next. If not exactly 4', you are going to have issues.

Ceiling...that ceiling looks easy to drywall. And drywall up there with some insulation will do more for temp control than anything else. Want access? Install some attic stairs.

 

[ttimpe]

First off......Paragraphs.....makes your post much easier to read.....

Drywall....you almost always hang it perpendicular to the studs/joists. Get out the tape measure.....I doubt your studs or joists are 'exactly' 16" OC. Or, measure 4' from one stud to the next. If not exactly 4', you are going to have issues.

Ceiling...that ceiling looks easy to drywall. And drywall up there with some insulation will do more for temp control than anything else. Want access? Install some attic stairs.

So drywall the rafters not the roof area where do I put insulation

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[xtremek]

You put the insulation between the bottom "cords" (the bottom boards of the rafters). Is your "attic space" vented? In my case I have a ridge vent and soffit vents. If you're set up like me, you'll want to get the spacer things so when you put the insulation up, the insulation doesn't block the airflow from the soffit vents.

 

[Blownchevelle68]

 

[GYPSY400]

So drywall the rafters not the roof area where do I put insulation

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Insulate between the rafter joists then Drywall the underside of the rafters, making it a ceiling.. this will help hold up the insulation as well.. If you want to still getup to the attic, make a hatch for access. This will make the attic a cold zone and the garage a warm zone.


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