Questions about detached garage...insulation and such

Old 02-23-14, 09:23 AM
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Questions about detached garage...insulation and such

I have recently purchased a house and although it's not my first home, it is my first with a detached and un-insulated garage. I suppose I've take the latter for granted in the past as changing my oil and replacing an alternator this winter was not so pleasant this winter. As such, I've started to look into insulating the building....but have run into some things that I am not so sure of. First the facts:

Garage is approx. 20' x30'
Ceiling is open to the roof with the exception of a small section floored off for storage. There is one of those little drop down attic ladders to access it.
Walls are open to the studs
Exterior is sided...

Weird part (for me anyways): There is zero ventilation in the garage. No gable vents or ridge vents on the roof. Also, there doesn't appear to be any "soffet" per se. Only a little over hang on the outside which is created by a 2x running the length of the garage.

So...can I insulate the walls inside, put in a ceiling with insulation on top of it and just put in gable vents to provide air flow in the "attic"? I always thought you had to have soffet vents with baffles AND a ridge vent/gable vents for it to "work right" though...Thanks in advance for the advice!
Old 02-23-14, 10:14 AM
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Soffit vents can still be added by using a self drilling auger bit and snap in round vents in the fascia's.
Or you could use a smart vent.
SmartVent by DCI - The #1 Choice for Attic Intake Ventilation

Then add a ridge or two gable vents.
Old 02-27-14, 08:17 PM
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And it would help to add a source of auxiliary heat, too, for making the place comfy when you want to work out there in cold weather. A small wood stove comes to mind, since you probably have lots of trees (being in Michigan) for furnishing free fuel.

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