Basement insulation
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Basement insulation (by Rudy [NY]) May 14, 2018 10:29 AM
       Basement insulation (by S i d [MO]) May 14, 2018 10:46 AM
       Basement insulation (by Robert,OntarioCanada [ON]) May 14, 2018 11:22 AM
       Basement insulation (by cjo 'h [CT]) May 14, 2018 11:39 AM
       Basement insulation (by David [NC]) May 14, 2018 12:49 PM
       Basement insulation (by RB [MI]) May 14, 2018 1:56 PM
       Basement insulation (by Johnny B. [MA]) May 14, 2018 2:07 PM
       Basement insulation (by Ed [PA]) May 14, 2018 3:40 PM
       Basement insulation (by Rudy [NY]) May 14, 2018 3:59 PM
       Basement insulation (by Nellie [ME]) May 14, 2018 4:49 PM
       Basement insulation (by LindaJ [NY]) May 14, 2018 4:55 PM
       Basement insulation (by NE [PA]) May 14, 2018 5:13 PM
       Basement insulation (by Rudy [NY]) May 14, 2018 5:22 PM
       Basement insulation (by Vee [OH]) May 14, 2018 6:28 PM
       Basement insulation (by small potatoes [NY]) May 14, 2018 6:39 PM
       Basement insulation (by nhsailmaker [NH]) May 15, 2018 3:56 AM
       Basement insulation (by Robert J [CA]) May 15, 2018 9:30 AM
       Basement insulation (by cjo'h [CT]) May 16, 2018 1:46 PM
       Basement insulation (by nhsailmaker [NH]) May 17, 2018 3:54 AM

Basement insulation (by Rudy [NY]) Posted on: May 14, 2018 10:29 AM

I keep reading conflicting things. Should I insulate my basement walls and ceiling ? Basement is concrete walls with french drain around it. I framed it out with metal studs. I canít decide if it should be insulated or not. Iím not trying to create a moisture/mold issue. --68.132.x.xx

Basement insulation (by S i d [MO]) Posted on: May 14, 2018 10:46 AM

Walk-out basement: yes on all exposed/semi-exposed walls. In-ground basement, probably not, unless the frost line goes down deep in your area.

Basement insulation (by Robert,OntarioCanada [ON]) Posted on: May 14, 2018 11:22 AM

Rigid board with R factor of 5 per inch is probably the best insulation. If building was well insulated there would no need for a heating system at all. Installation is best done by taping all joints air tight. There is mold resistant drywall out there as well. Insulating all the heating, hot water pipes puts more heat into living areas as well. Fiberglass is the worst type of insulation which has a lot air transfer along with mold problems. View some videos on You Tube to see how insulating walls are done.

Basement insulation (by cjo 'h [CT]) Posted on: May 14, 2018 11:39 AM

Rudy,if you've already framed,a little late to be thinking about mold There were steps you should have taken.........Charlie...........................poor basement.................may be next ones?........... --174.199.x.xx

Basement insulation (by David [NC]) Posted on: May 14, 2018 12:49 PM

I don't know if this link will pass the filter but

Basement insulation (by RB [MI]) Posted on: May 14, 2018 1:56 PM

My idea of a Finished Basement comes in a paint can, only.

Let it breathe. --47.35.xx.xx

Basement insulation (by Johnny B. [MA]) Posted on: May 14, 2018 2:07 PM

You can insulate the small vertical section between the sill plate and the ceiling. That is technically an exterior wall and should be insulated.

Basement insulation (by Ed [PA]) Posted on: May 14, 2018 3:40 PM

Anything above grade should be insulated, I made the mistake of no insulation once. New construction puts insulation of the outside as part of the waterproofing process.

Basement insulation (by Rudy [NY]) Posted on: May 14, 2018 3:59 PM

Itís an inground basement. How would framing effect mold ? The framing is off the wall as thereís pipes that run along wall --68.132.x.xx

Basement insulation (by Nellie [ME]) Posted on: May 14, 2018 4:49 PM

The best insulation for a basement wall is 2Ē spray foam on the inside down to the frost line from the underside of the flooring underlayment. (4í in my area.)

I saved my cost in the first year when I spray foamed my rock foundation. You will want to have all the electrical updated. I would try not to encase the pipes for a HWBB heating system in the spray foam, though. Try to just keep them on the heated side of the insulation. We did have a frozen pipe this year. --70.16.xx.xx

Basement insulation (by LindaJ [NY]) Posted on: May 14, 2018 4:55 PM

All new construction is required to have an insulated basement or insulation in the basement ceiling under the first floor. That helps to insulate from the cold ground since the frost (below freezing temperature) can go 3 to 4 feet below ground here in upstate NY. If you are going to use the basement as living space or heat it for a work shop, yes, you do want it insulated. With the walls and floor insulated you will not have to insulate the ceiling. Insulation will keep your heating costs down. My basement can get down to 40 -45 degrees in a very cold winter.

Basements are underground and there is always moisture. Maybe not water but higher humidity because it is underground. A vapor barrier can help with that. But doesn't eliminate it. So use materials that are mold resistant and are not food for any fungus growth.

Basement insulation (by NE [PA]) Posted on: May 14, 2018 5:13 PM

Walls. The surrounding ground stays a constant temp and will suck heat out of your house.

Code here wants the ceiling done. I don't like the ceiling done if there is a heat source in the basement.

Basement insulation (by Rudy [NY]) Posted on: May 14, 2018 5:22 PM


Running baseboard in basement. Itís going to be tiled and full bathroom as well --68.132.x.xx

Basement insulation (by Vee [OH]) Posted on: May 14, 2018 6:28 PM

If there are pipes on the wall put the drywall in so there is a 12inch space open below for drainage and maintenance, the air flow will help keep temps uniform unless you put in vents and returns to the hvac system before the framing went in.

Basement insulation (by small potatoes [NY]) Posted on: May 14, 2018 6:39 PM

In the building I had a fire I was required to insulate the exterior wall and ceiling in a habitable space. I spray foamed the wall (brick n rock) with frothpak 200 from lowes. If you have time order the 210 product because the 200 says it is fro air sealing not insulation. I applied it 1"=R6. Then I filled between studs w/ roxul comfortbatt for 2x6 walls R23. I then caulked and stapled plastic sheeting to the studs (for air tightness). Same procedure for the sill plate. At a minimum spray the perimeter of the pocket and fill in front of it w/ roxul. Remember all this needs to be covered w/ at least 1/2" drywall. I hate pink fiberglass, it holds moisture and mice can live in it. Neither happens w/ roxul and it is fire retardant. I tried torching it and it barley smoldered. Also foam/ caulk all outlet boxes. When I had the drywall hung I kept it off the floor 2" (jik of flooding)and the baseboard covered it. In the ceiling I put roxul for 2x4 walls, R15.

From my understanding plastic sheeting is no longer recommended for above grade construction, but was recommended to me below grade.

I didn't address the floor 1/2 is a slab and the other half is a laid up on stringers and more than 4' below grade.

Does your french drain interfere with your plans? --24.194.xx.xx

Basement insulation (by nhsailmaker [NH]) Posted on: May 15, 2018 3:56 AM

As an energy auditor I would not do the ceiling.

Nor would I want pipes isolated outside your insulated perimeter unless they have separate substancial insulation between them and the exterior wall.

Rigid "thermax" foam or spray foam (with intumescent fire retardant paint covering it what is required) is best but not likely with studs in place.

At a minimum 2" rigid "thermax" foam cut and inserted (then can of foam to seal in place) at the rim joist bays is 100% necessary.

Re moisture - what happens when you have hot air in the room hit the cold surface of the concrete - hint - think of a beer can on a sunny day.

Energy Dept says insulate the walls to just below frost level if exterior walls are not covered with blue board.

Your concrete floor and walls below the frost line will be a constant 50+ degrees and suck warmth from the room - plan accordingly

Basement insulation (by Robert J [CA]) Posted on: May 15, 2018 9:30 AM

As a contractor I never want to create an additional problem. So before I go ahead and insulate a basement I want to conduct test during different weather conditions.

With moisture meters, test drilling and placed contact materials -- I'll run tests over a cold, damp, wet winter season.

Often I'll find the concrete sweating and moisture build-up on the inside of the basement. In one case I had to build a space between the basement wall and my interior finished walls and install a circulation fan to the outside to reduce and eliminate moisture build up. --47.156.xx.xx

Basement insulation (by cjo'h [CT]) Posted on: May 16, 2018 1:46 PM

NhSailmaker,why. Would you refrain from doing the ceiling?,!just because of the furnace,or what..........chsrlie................................................ --174.199.x.xx

Basement insulation (by nhsailmaker [NH]) Posted on: May 17, 2018 3:54 AM

cjo'h [CT]..... YES - It is an un-intended conditioned space because of the small amount of heat spun off by current heating system.

The rule of insulation is to have a 100% air and insulation barrier around the perimeter of your heated space.

The stairway to 1st floor becomes an escalator for moisture and heat because of the stack effect. Unless the ceiling and door are insulated and .....air sealed..... then you have accomplished nothing but created a poor ceiling sound barrier

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