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11-08-2012, 10:04 PM
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#1
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Newbie
Join Date: Aug 2010
Posts: 14
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foam board and housewrap
I am removing our siding as there isnt much insulation in the walls and our house is pretty cold. I would like to add foam board and housewrap i am not sure which onegoes over the osb first
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11-08-2012, 10:08 PM
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#2
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Member
Join Date: Nov 2011
Location: Hartfield VA
Posts: 18,253
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foam board and housewrap
Not going to want to do that in most cases. That would form a double vaper barrier if there's already one on the inside.
Tell us from the inside wall to the outside what there is for layers.
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11-08-2012, 10:21 PM
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#3
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Exterior Construction
Join Date: Aug 2011
Location: VA, MD, DC
Posts: 3,493
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foam board and housewrap
House wrap is not a vapor barrier at all. It is extremely vapor open.
You can do the foam or housewrap in either order as long as the flashing details are correct.
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11-08-2012, 10:44 PM
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#4
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Member
Join Date: Oct 2012
Location: Albuquerque NM
Posts: 605
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foam board and housewrap
No expert here, but we typically deal with stucco siding on our remodels.
You add a addition and now need new stucco for it and old house has no insulation and stucco is in bad shape.
We often have our stucco crew wrap the house in 2" ridged foam, then they wrap it in what I call tar paper, you call it what you want, then the chicken wire and then stucco on top of that.
Is many things like outdoor electrical boxes that need to be extended and is no big deal.
Then they come in and nail up the foam and have to cut and piece in little pieces around other objects like a service panel and other utilities on exterior walls.
Then they wrap it. When done they make me want to hire them to wrap Christmas presents, they do such a nice job.
Then the wire goes on top of that. That is for stucco, but seems would be same process for other siding also.
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11-08-2012, 10:49 PM
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#5
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Average Joe/ex-Navy IC3
Join Date: Dec 2006
Location: Midwest - Central Illinois
Posts: 9,286
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foam board and housewrap
If the house is cold inside, the first thing I would be doing is going around and sealing any air leaks around outlet boxes, and removing the window trim to put in foam to seal around them, same with doors.
I have no insulation in my walls, but have 6 inches up in my attic space and R-13 around the Rim & Sill joist area in my basement.
My house stays right at 69 degrees with 2 cycles an hour, if really windy outside & cold during the Winter, maybe 3 cycles an hour. During Summer I see the same in cycles per hour.
Placing insulation around the outside will help to air seal from the outside in, but you need to seal from the inside out first.
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11-08-2012, 11:10 PM
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#6
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Moderator
Join Date: Mar 2009
Posts: 8,782
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foam board and housewrap
Where are you located?
Gary
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Clothes taking longer to dry?
Clean the dryer screen in HOT water if using fabric softener sheets.
They leave a residue that impedes air-flow, costing you money.
Clean the ducting in the last six months? 17,000 dryer fires annually!
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11-09-2012, 03:20 PM
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#7
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Newbie
Join Date: Aug 2010
Posts: 14
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foam board and housewrap
ottawa ontario,
-the house is build in the early 70's.
-The basement is unfinished
-we also have a wood fireplace with an insert, the flue is left open
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11-10-2012, 08:01 AM
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#8
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Exterior Construction
Join Date: Aug 2011
Location: VA, MD, DC
Posts: 3,493
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foam board and housewrap
Whats the wall construction size?
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11-10-2012, 03:15 PM
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#9
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Moderator
Join Date: Mar 2009
Posts: 8,782
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foam board and housewrap
You can see we need to know the wall make-up for the foamboard/vapor retarder, the inside poly- or not, etc, as Joe asked.
Gary
__________________
Clothes taking longer to dry?
Clean the dryer screen in HOT water if using fabric softener sheets.
They leave a residue that impedes air-flow, costing you money.
Clean the ducting in the last six months? 17,000 dryer fires annually!
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