When I was researching energy saving enhancements to my house a few years ago this came up. Spraying insulating foam on the back (underside) of the roof. Only problem is that it’s difficult to do it once the house is built out. I did the numbers and the payback wasn’t worth it.
I’ve discussed this before, but I’ll do it again for the benefit of the conversation: Go through your house and seal every last penetration of the living area. This means taking all of the covers off of electrical boxes, light fixtures, you name it, if they’re on an exterior wall or attic facing ceiling. Get some tubes of caulk and go at it. Seal around where the box meets the drywall and any holes or penetrations in the box, like where the wires come into it. To give you an idea of the gaps that can potentially exist, I did this on the house we just moved into while I was painting. In a 2400+ square foot house I went through four tubes of latex caulk. Think about the surface area that covers if it was laid out 1/4” thick. That’s a pretty big area, I’m guessing a good three square feet, probably more. Think about how much air could go through an opening that size, going in or out. This is the second house I’ve done this to. In the last one it made a noticeable difference in energy consumption, easily knocking 10%-15% off of the electric bill, which is both our cooling and heat. I don’t have a point of reference for the new house, but I’m sure it will make a difference. -D > On Feb 26, 2020, at 3:36 PM, Randy Bennell via Mercedes > <mercedes@okiebenz.com> wrote: > > On 26/02/2020 12:09 PM, Curley McLain via Mercedes wrote: >> One of the best things i've come across for making a building energy >> efficient is a thin layer of insulating foam sprayed on, then added >> fiberglass or stabilized cellulose in the remaining space. Seals out bugs, >> generally mice, drafts, etc and also makes a vapor barrier. Also good >> sprayed on roof sheeting. > > Good but expensive. > > RB > > > _______________________________________ > http://www.okiebenz.com > > To search list archives http://www.okiebenz.com/archive/ > > To Unsubscribe or change delivery options go to: > http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > _______________________________________ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
