Blown-In Insulation’s Three Biggest Problems
Thinking of adding blown-in fiberglass insulation to your home? There are a few things to learn before you make your final decision. If you’ve done a little research, you know fiberglass insulation is sold by R-value – the higher the R-value, the more efficient the insulation is.
Of course, you want to take full advantage of that. You want to have your insulation as energy efficient as possible. But there are a few things that can interrupt this process and have your final rating well below what you thought you were receiving.
1st Problem: Fiberglass insulation does nothing to stop the air from passing through it
Chances are you’ve looked at the pink, cottony fiberglass insulation and wondered how it stops air flow. It doesn’t. In order to receive the full insulating qualities the blown-in fiberglass insulation offers, you’ll have to ensure all of the cavities in your attic or wall space are sufficiently sealed. Air sealing is critical to ensure a warm house. That means you’ll have to seal up all of those gaps, cracks, and holes that are in your attic and walls before you blow the insulation into place.
2nd Problem: Fiberglass insulation should never be compressed
For most things we install, the tighter the fit, the better the item works. Not so with blown-in fiberglass insulation. Inside fiberglass insulation is tiny air pockets. These air pockets are what slows down the heat transfer process. If you compress the insulation, you get rid of these tiny pockets of air. And without those, heat can easily move through the insulation and dissipate into areas where it shouldn’t be.
3rd Problem: Fiberglass only works if it’s installed properly in all areas
That means if there are gaps or holes, you’re going to lose the R-value properties. Blown-in insulation should touch every corner of your attic. If you add a new vent, install a ceiling fan, or make changes to the plumbing or electrical system, those should be made so as not to disturb the insulation, so it still fits snuggly up against every potential leak in the area.
If you miss even just a few areas, it can add up to significant loss of heat throughout your home. You’ll notice it in your comfort level. You’ll notice it on your utility bill.
If you’re tired of seeing your heating and cooling bills rise each year, maybe it’s time to do something about it. Maybe it’s time to add blown-in insulation into your home.