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The insulation is installed into the wall cavity with the paper facing into the house. This is very important — the paper, which is the vapor barrier, always faces the warm side of the house. Wiring should be installed before any insulation. Electrical systems and insulation both need to be installed inside the wall cavities of your home, and it is important that they go in in the correct order. Place unfaced insulation on top of existing material, such as loose-fill cellulose. Press the insulation firmly into place between joists, taking care to not compress the fiberglass and reduce its efficiency.
Fasten batts loosely to perpendicular joists with plastic straps just to keep it from shifting. Fiberglass Insulation In most climates, it needs a vapor barrier. Some builders rely on batts with attached kraft-paper facing to do that job, but Tom recommends unfaced batts, covered in plastic with all the seams taped shut.
Unfaced insulation is great for new construction, remodels, walls, floors, ceilings, basements, attics and crawlspaces. I removed the skirting and went under and the insulation was non-existent. I plan to put r30 unfaced insulation under it and wrap it with the correct plastic. I live in pa half hr 45 min north of Pittsburgh. The area is usually colder then the weather station says. So to my questions. Is it economical to put unfaced r30 insulation under the home. PS: I sealed all the holes and edges under the home with great stuff spray foam as a air barrier 2.
What way do I face the paper in the walls? It gets to -5 sometimes in the winter and 98 in the summer. Addendum: Also I will be keeping the house at around degrees in the winter months for my little kids. I am trying to insulate the underpinned of a mobile home, I do not want to remove the metal skirting because is permanent, it will be hard to remove.
So is it possible to use blue foam boards attached to the metal from outside. If is alright how should I do it in order to have ventilation and at the same time vapor barriers to avoid condensation issues? Do I applied vapor barrier outside the metal then the blue foam boards, plus plaster or first the blue foam the vapor barrier and then the plaster or blue foam, plaster vapor barrier.
Going under the house is not an option for me or my children, the best solution is fixing the problem from outside. Any suggestions thanks in advance for your help. I have a metal storage building what would be the best insulation to use before I finish off the interior wall.
Mike, Yes, you should put unfaced insulation either rolls or batts on top of existing insulation, so that you only have on vapor barrier facing the heated house.
We recently purchased a house with an addition that has an unfinished, as no heat, no electricity, in the basement of the addition. We plan on eventually finishing the room. But would like to enjoy the space during winter months -If pink insulation vapor barrier closest to the floor or on the out side of insulation -foam insulation. Is it worth the cost? Thank you for your time. If I am using paper faced rolled insulation between rimed joist in the basement and first level subfloor which way should the paper go — towards the outide of the house or towards the inside of the house?
Is it better to use faced or unfaced rolled insulation in this case? Ken, If the basement is unheated, put the facing up toward the first story floor. Landscape fabric would also work. I bought Poly Shield insulation board which has an aluminum layer on one side. Still a bit confused. I am trying to insulate above the rim joist in the basement.
If I use faced insulation should the paper go towards the outside of the house or the inside? The insulation is against the wall NOT towards the first floor. Or, should I use unfaced? My thoughts were I would use faced so there would be a barrier for moisture coming from the outside wall. Can I just remove all doubt and potential moisture and go with unfaced and get a good barrier of insulation?
Ken, On basement walls, the vapor barrier facing on insulation should be toward the outside of the house. It is also a fire hazard to have the paper visible, as the treated paper will contribute significantly to a fire.
Thank you Ben and Tim! Stretch wire across the batting from one floor joist to the other if a friction fit is not sufficient to hold the batting. Robert Korpella has been writing professionally since He is a certified Master Naturalist, regularly monitors stream water quality and is the editor of freshare.
Korpella's work has appeared in a variety of publications. He holds a bachelor's degree from the University of Arkansas. By Robert Korpella. Related Articles.
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