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https://www.houzz.com/ideabooks/136792495/thumbs/closet-over-garage copied to clipboard
https://www.houzz.com/ideabooks/136792495/thumbs/closet-over-garage copied to clipboard

Closet over garage

Comment
mike_home

Check the insulation in the attic. You want at least an R30 insulation value, and preferably R49. While you are up there check on how the attic is ventilated. You may need to add more vents to improve air flow. The garage ceiling must be well insulated. If it is not all the hot air in the garage will rise up into your bedroom. The garage and attic create a sandwich of hot air. This is why the master bedroom is the hottest room in the house.

Q

Reply to: Check the insulation in the attic. You want at least an R30 insulation value, and preferably R49. While you are up there check on how the attic is ventilated. You may need to add more vents to improve air flow. The garage ceiling must be well insulated. If it is not all the hot air in the garage will rise up into your bedroom. The garage and attic create a sandwich of hot air. This is why the master bedroom is the hottest room in the house.

Q

Comment
energy_rater_la

the issue is temperature gain from the extreme attic temps that surround these rooms. we generally use spray foam on roofline..high cost but fast...& pay lots of attention to details of foam install. must be air tight to outside as you are creating an unvented semi conditioned attic..depth & type of foam must reach recommended R-values of your area. other than that...you can add a reflective foam board at all walls shared with attic space (over insulation.. caulked to air seal, taped seams & attached with button cap nails). this will add insulation value to the walls, air seal & reflective coating on foam sheathing will reflect heat back into attic space. search southface's website for air sealing pdf's. this wall shared with attic space is called a kneewall. which also applies to the difference in ceiling heights of interior rooms in attic space. as your central unit runs...it pulls attic air/temps into these walls open to extreme attic conditions. stopping the heat gain & air infiltration is the best investment. depending upon how well your existing ductwork is sealed...and average home has minimum of 30% duct loss...mastic seal of ducts is also a quick return on investment & improvement in comfort. best of luck.

Q

Reply to: the issue is temperature gain from the extreme attic temps that surround these rooms. we generally use spray foam on roofline..high cost but fast...& pay lots of attention to details of foam install. must be air tight to outside as you are creating an unvented semi conditioned attic..depth & type of foam must reach recommended R-values of your area. other than that...you can add a reflective foam board at all walls shared with attic space (over insulation.. caulked to air seal, taped seams & attached with button cap nails). this will add insulation value to the walls, air seal & reflective coating on foam sheathing will reflect heat back into attic space. search southface's website for air sealing pdf's. this wall shared with attic space is called a kneewall. which also applies to the difference in ceiling heights of interior rooms in attic space. as your central unit runs...it pulls attic air/temps into these walls open to extreme attic conditions. stopping the heat gain & air infiltration is the best investment. depending upon how well your existing ductwork is sealed...and average home has minimum of 30% duct loss...mastic seal of ducts is also a quick return on investment & improvement in comfort. best of luck.

Q

Comment
roadking

The room over the garage cooling problem is a very common one. Agree with comments regarding better insulation to decrease heat gains as the best solution for the long run. If your looking for the cheapest way to get better cooling consider a window air conditioner albeit you'll deal with more noise. A second idea might be a mini split AC or heat pump unit for that room. Mini splits are very quiet and very energy efficient. Third idea would be creating another zone just for the master bed room (assuming you don't already have that). Assuming your present AC system wasn't already running almost 100% of the time during the hottest days zoning would help. This might lead to the highest electrical bills though.

Q

Reply to: The room over the garage cooling problem is a very common one. Agree with comments regarding better insulation to decrease heat gains as the best solution for the long run. If your looking for the cheapest way to get better cooling consider a window air conditioner albeit you'll deal with more noise. A second idea might be a mini split AC or heat pump unit for that room. Mini splits are very quiet and very energy efficient. Third idea would be creating another zone just for the master bed room (assuming you don't already have that). Assuming your present AC system wasn't already running almost 100% of the time during the hottest days zoning would help. This might lead to the highest electrical bills though.

Q