There are a couple creative yet expensive ways i would consider retroactively insulating the walls of an old house if you are in a far northern climate where it might make financial sense.
Old attic walls paper.
Kitts was tearing the bathroom walls out of an 83 year old home near lake erie in 2006 when he discovered two green metal lockboxes suspended inside a wall below the medicine chest hanging from a.
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It likely has the same 100 year old kraft paper behind it that provides virtually no water proofing support.
Laying a second layer of fiberglass batts in the attic is an easy way to boost r values.
But if the new layer has a kraft paper backing it can trap moisture and turn the layers underneath into a soggy mess.
It needs a certain amount of loft to work properly.
The vapor retarder on top of or between layers of insulation can trap moisture.
You can buy them unfaced or simply remove the paper or foil backing.
Illustration by ian worpole heat blockers.
Don t mash or compress the insulation into the space.
Place a new layer of unfaced batts perpendicular to the old layer to cover any gaps in the lower layer.
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Batt or rolled insulation or blown loose fill insulation fiberglass or cellulose can be installed on top of old insulation.
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Doubled vapor barriers in attic.
Achieving greater r values in attics the higher the r value the better the thermal performance of the insulation.
Use r 30 insulation for the ceiling and r 13 for the walls.
I m going to start by saying that i am seriously in love with how this little experiment turned out.
Find your zone on the map and then use the chart to determine the level of insulation you need to properly insulate your attic walls floors and crawlspaces.
Staple insulation between the wall studs and ceiling joists image a.
If you happen to follow along on instagram you saw a little sneak peek of a creative wall covering idea i worked on with my bff at one of our rental houses in maryland.
I see this mistake all the time tom says.