I would encourage you to read up on SPF and if you do go that route, make sure you get a great and insured installer.  SPF does have additional benefit from and air sealing standpoint but beyond the airtightness improvements, does not (in the case of OC SPF) have any greater R-Value than traditional batting assuming that both are in an static air environment.  Best thing you can do from a real high performance wall assembly is to thermally uncouple the exterior wall from the framing.  This will net you a much higher performance assembly than SPF alone but should be done by someone that is familiar with this approach and applications. 

SPF is great but I prefer it to be used as an air sealant first and foremost. 

Educate yourself on the pros and cons before you engage in an insulation schedule. 

Eric Novotny

Hey Alex, 

?I would say that close cell spray foam insulation is the way to go if your budget allows for it.  Although it's much more expensive than batt insulation, the long term savings on your energy bills will be far greater.? Hope this helps! 

Cheers, 

Eric Consuegra, AROCON Roofing and Construction, LLC

Spray Foam. Much better insulator and fills any gaps that might otherwise be missed.

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Definitely replace your air filters every single month as this is a big contributor to a home's energy efficiency when it comes to HVAC

Check seals on doors & windows.  Replace single pane windows with newer products.  Check the attic for insulation.  Loose fill, blown in insulation is the best.  Make sure to seal any spots where air is escaping INTO the attic first.  Also make sure your attic has both adequate intake AND exhaust ventilation.  Make sure not to clog the airflow from the soffit area and the attic space by using Baffles as seen in the picture.  Check out YouTube for other great suggestions. 

Air sealing and insulation are the two biggest things you can do to globally improve the efficiency of the home. 

There are several articles on this application and I have yet to be in a home that didn't need it. 

Tightening up the envelope across the attic surface will lessen air infiltration at all the other areas of the home. 

Verify that all window and door seals/weatherstriping is in good shape.

Check to be sure doors and windows are caulked properly (no gaps, cracks or missing).

If you have an attic access, treat it like door opening and seal properly. If possible, create an insulated cover to go over it in the attic.

Check HVAC ductwork for leaks and seal with foil tape or mastic.

Wrap your hot water heater in a blanket.

John,

Are you referring to insulating the ceiling of the garage (i.e. cold floors above)?   Will you be dropping the ceiling or are you looking for options with minimal disturbance?

Hello John,

STEP 1.  This is a very common for homes with room(s) obove a garage.  Replacing the window (s) in the bedroom  may not solve your entire problem if the glass package you select does not include a high performance  heat reflectant type glass.   Which ever manufacturer you decide, its best to pay the additional cost and upgrade to thier best performance glass.  If you have already invested in new windows then check your paperwork to see if there is a greater performance glass option you can upgrade with for that type window .   This is a simple process and can greatly reduce your Solar Heat Gain for minimal investment.

STEP 2.  Select a certified insulation professional in your area to provide you with a "critical point air seal".  Properly applied by a certified professional at upper and lower rim joists in this room aproximatly  1' in width by 2" in thickness. Air sealing the upper and lower rim is a minimal investment  and provides  a significant and noticable change in comfort with a quick ROI.  Consider this service for the entire home.

Warm regards

Colorado Home Exterior

You can also look into programmable thermostats!

I would start with making sure your attic has adequate ventilation.