Add insulation when changing siding?
We are getting our windows done on our 40 year old over the next month (yes they are the original windows LOL). We currently have 2×4 walls with full insulation, zone 6 climate. Has anyone ever increased the insulation R value by adding styrofoam? We are residing the house within the next couple of years.
Thinking about adding 2 inch foam around 3/4 of the house (front wall is brick) just not sure if the cost recovery will be worth it (not to mention the difficulty in matching the wall that meets the brick wall due to the extra 2 inches). It looks like a 48×96 sheet will run $60. We are in Ottawa, so fairly cold winters.
Our walls don’t get THAT cold in the winter, and heating/cooling costs aren’t horrible. However, if we think it’s worth it, the time to do it is now, as I can get the windows with the extra two inches added.
Has anyone added extra insulation in the way of styrofoam when residing the house? Worth it? Or more beneficial to put more money into the attack insulation.
The only thing I’m really worried about is the vapour barrier – I know if it’s not there it’s not a big deal, but even if it IS there, it was put up 40 years ago so I doubt it’s overly thick. Hell, the headers in the basement doesn’t even have a vapour barrier, just insulation.
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