233 reputation
214
bio website kenmankoff.com
location NYC, WHOI, or Antarctica
age 37
visits member for 4 years, 7 months
seen Mar 22 at 13:37

Mar
19
awarded  Curious
Feb
19
comment Which furnace thermostats support variable swing/deadband?
See page 8 here: customer.honeywell.com/resources/techlit/TechLitDocuments/…
Feb
11
revised Radiant heat in ceiling
edited body
Feb
11
answered Radiant heat in ceiling
Feb
11
comment Radiant heat in ceiling
Unfortunately this is a thing. Here in PA I've heard of several houses that are single story and have radiant heat in the ceiling. :(.
Jan
22
revised Does 2“ of spray foam mean 2”, or are measurements like with finished lumber?
edited title
Jan
22
asked Does 2“ of spray foam mean 2”, or are measurements like with finished lumber?
Nov
14
awarded  Benefactor
Nov
14
accepted Will foam-filling this gap create problems?
Nov
13
comment Will foam-filling this gap create problems?
Yes foam has higher up-front costs due to materials and labor, but I don't think it is competitive over the long run to have R4/in (R20 total since I need an air gap) v. R6.5/in. (R39, no air gap needed when foamed).
Nov
12
comment Will foam-filling this gap create problems?
@Ecnerwal The roof is good, and a new roof is probably waaay more expensive than foam-filling that air gap. When I need a new roof in a decade, yes I'll leave the old one and just add on top. I think rubber makes that easy to do.
Nov
12
comment Will foam-filling this gap create problems?
Thanks for detailed reply. I'm trying to maximize R while minimizing cost w/ the low cost introducing problems (aren't we all? That is a generic statement). So... Just filling with foam gets better R for not too much cost than the foam boards or blown cellulose (not as much R) or removing the roof (too much $), etc. But I'm still concerned about 1 thing you wrote: "Crucial air barrier" created by 2 inch of foam, but the horizontal wood boards are above/inside that. Yes they are air-sealed, but could the moisture still form inside those boards and eat them away?
Nov
12
comment Will foam-filling this gap create problems?
1) I'd take the ceiling down, spray-foam, then re-attach. 2) No wiring now. I'd add some below the spray foam before re-attaching the ceiling. 3) Yes of course.
Nov
12
revised Will foam-filling this gap create problems?
added 88 characters in body
Nov
12
comment Will foam-filling this gap create problems?
But even 4*R7 = R28 (only). I'd like R50-R60...
Nov
12
comment Will foam-filling this gap create problems?
Would the wood boards be subject to moisture problems with this configuration?
Nov
12
awarded  Promoter
Nov
12
revised Will foam-filling this gap create problems?
deleted 592 characters in body; edited title
Oct
17
asked Will foam-filling this gap create problems?
Sep
19
accepted How do I determine/control which heat source is used (heat pump, oil)