Question about roof vents

[sk8louisville]

I have a question I was hoping you guys could help me with.

I have a small 2 car block garage. No insulation on the walls or ceiling. It's usually 20 degrees hotter in there than outside and the summers in Kentucky can be pretty brutal.

There's no attic or anything, just the roof coming down to meet the block wall (and gaps were they meet). So I'm thinking I need to vent the roof. I think the hot air is getting trapped up there and is heating the whole place up.

So I'm wondering:
a. Am I even barking up the right tree?

b. If so, do they make vents that can be closed in the winter to prevent the heat from escaping?

Thanks guys!

 

[rockchucker]

100%! More Roof Vents the better. If you want to keep the hot air in then just keep a few pieces of plywood handy for the winter to screw over the vent. Make sure you use 1" screws so you do not puncture through the roof when installing the blocks.


You can also install a Gable End Fan on a Thermostat. When it reaches 70° or whatever you set the Thermostat at the fan pushes open a Louvered Vent and vents the hot air. In the winter since it doesn't get over that temperature the Louvered Vent stays closed and keeps the warm air inside.


Something like this with an Adjustable Thermostat...


http://www.wholehousefansdirect.com/qmarkgv16startpage.asp


Coupled with something like this...


http://www.globalindustrial.com/g/hvac/exhaust-fans/exhaust-and-supply/Low-Velocity-Exhaust-Shutters


All you have to do is "Set it and forget it!!!"

Supply power. Hell you could even use an Extension cord. I would wire it in properly though. Build a Box for the Fan and mount it. Cut the hole and install the Louvered Vent. Install the Box and Fan behind the Louvered Vent. Set the Thermostat to where you want. Never touch it again except for maintenance on the Electric Motor for the Fan.

 

[sk8louisville]

Awesome. Thanks for the info!

 

[kbs2244]

A powered fan is way over kill for this.
Two of the square "mushroom" vents will be fine.
If you want to bock them in the winter, use some foam board trimmed to fit the hole.

 

[ket-tek]

Do you already have soffit or gable vents? Is the roof trusses or stick built?