Foundation Insulation Suggestions

[heehaw]

i have never seen it done: but have heard that cellulose can be sprayed on "crawlspace" walls to insulate them: same way its sprayed into walls on new homes.
heehaw

 

[scott_vt]

Good morning Scott, At my place in Lancaster NH, which as you know gets cold, I put 2" blue styrofoam on the outside of the foundation from sill to 24" below grade. 48" total. I had metal flashing bent to hold the top of the foam. Top of insulation cut to 45 degree to shed water. Flashing attached to sheathing & bent down at 45 degrees then vertical for another 1/2". At -45F my basement is 80F with the wood stove going & stays above 50 when we're not there & first floor propane heater is running. The outside of the foam is covered with a cement based brush on coating for UV protection. Only problem is that finish (and foam) is not weed eater proof. I trim around the foundation with Round-up. MikeD74T

Good Afternoon Mike,
That sounds like a very good suggestion also, sorry for the delay getting back to you !

Home Depot has that 2" pink stuff, and if I can find a good covering for it, that may work out fine !

 

[scott_vt]

Good morning Scott, At my place in Lancaster NH, which as you know gets cold, I put 2" blue styrofoam on the outside of the foundation from sill to 24" below grade. 48" total.. MikeD74T

Good Afternoon Mike,
Im thinking this is the way Im going to go also !

Any particular reason for the 2' below grade

? Im sure your frost goes deeper than that, but down here at my Ct home 2' or even 1 1/2' would probablly work well.

The only place it would be a problem is on the far side of the cellar, I have a 2 car garage and that is paved on that side of the house but there is only about a 1' of exposure over there.

The matal strips sound like a good also ! Im thinking of that coating that looks like concrete or just gray paint.

 

[MikeD74T]

Good Afternoon Mike,

Any particular reason for the 2' below grade ...

Im sure your frost goes deeper than that,... quote]

My building has a concrete /stone foundation that was formed on the inside only with 3 courses of block up to ground level. I raised the building another 3 courses. The only way to use foam more than 2'below grade would be to clean the rough wall & spray foam. My building usually has good snow cover for at least 10' around the house so frost doesn't go very deep unless it's a bare winter. I keep the snowmachines, etc, away from that snow. Going deeper with the foam would be better but there's a diminishing return there somewhere. MikeD74T