Save Money With an Insulation Upgrade
Correcting inadequate insulation is one of the quickest energy-payback projects you can do, resulting in lower heating and cooling bills and increased comfort.
If your house doesn't have enough insulation-common in homes built before 1980, when energy awareness began to take hold-bringing it up to current standards will make it more comfortable all year long. Plus, you could save anywhere from 10% to 50% on heating and cooling bills. The amount of savings for upgrading insulation depends on many factors, including where you live, what type of heating system you have, and how much insulation you add.
How to compare different types of insulation
On each type of insulation, a label states the R-value per inch, a measure of resistance to heat transfer. The bigger the number, the more effective the insulation. Where space is tight, such as within wall cavities, you need a high R-value per inch. In an attic or under a floor, where there is more room, you can boost the insulation value of a lower-rated material simply by using a thicker layer. As a rule, the more insulation you add, the more money you'll save. But there is a point beyond which you can spend more on materials than you'll recoup in lower energy bills. The tipping point varies depending on where you live. Consult the Department of Energy's zip-code specific recommendations for the right amount of insulation for your climate.
Adding insulation in the attic
The attic is a great place to start, because adding insulation there is quick, easy, and cost-effective. (To make any insulation upgrade more cost-effective, it's a good idea to seal air leaks first.)
To determine how much to add, look up the recommended amount for your area (https://www.ornl.gov/sci/roofs%2bwalls/insulation/ins_16.html), then subtract the value of your existing insulation. If you don't know, you can figure it out using the Home Energy Saver online energy audit tool (https://hes.lbl.gov/hes/makingithappen/no_regrets/insulationold.html).
There are two ways to improve attic insulation. In unfinished space, you can simply add layers to what is already on the floor. Or, if you're thinking about finishing the attic, you can put the insulation against the roof. Insulating the roof is the better method if heating and cooling ducts pass through the space, or if you live in a humid climate and want to cut down on musty smells coming from the attic.
If you're doing the job yourself blanket-type material is easiest to work with. Just be careful not to compress it or it won't be as effective. If you're hiring a contractor, go with loose-fill cellulose or fiberglass, which fills crevices better. You'll pay a pro around $1 a square foot to blow in material; DIY batts cost about half that.
If you're insulating the roof, sprayed foam polyurethane works best because it molds to rafters, blocks water vapor, and has a high R-rating per inch. Expect to pay about double the cost of loose-fill insulation.
Adding insulation to walls on main floors
It's fairly easy to add insulation in stud bays where none exists. (To check, cut the power to a few outlets on exterior walls, then unscrew and look behind the cover plates.) A contractor drills small holes through the inside or outside wall and blows in material. Costs range from around $1.25 per square foot for loose-fill fiberglass, cellulose, or rock wool to $4.40 for polyurethane foam, which insulates about twice as well.
If your walls already have some insulation, you probably can't add more without tearing into the drywall or plaster. That's not cost effective unless you're remodeling, so the best strategy may be to wait until you need to replace siding. Then you can add insulating sheathing underneath it.
Crawl spaces
Even though hot air rises, homes lose heat in all directions. So besides insulating the top and sides of your house, you also need to insulate the bottom, where as much as 30% of energy loss can occur.
If you are interested in learning more about home improvements that can save you money or add to the value of your home please give me a call.
Pamela Efferson, REALTOR
ASR, CSR, GRI, HRC, SRES
Member HAR, NAR, TAR, WCR
2009 Featured Realtor in Houston Real Estate Executive Magazine
2010 Houston Association of Realtors Top Producer
2011 FIVE STAR™ Real Estate Agent Texas Monthly Magazine
Web. www.SellingHomesInHouston.com
Blog: https://blogs.har.com/Efferson
dir. 713-822-8555