199 reputation
213
bio website kenmankoff.com
location NYC, WHOI, or Antarctica
age 36
visits member for 4 years, 3 months
seen Nov 14 at 20:15

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)
Sep
19
comment How do I determine/control which heat source is used (heat pump, oil)
I think the correct answer is the "Heat Pump Compressor Lockout" sets when it switches to backup. This is called "Balance Point Temperature" elsewhere in the manual. This is 0350. Also 0360 "Heat Pump Auxiliary Lockout". See also page 33 and 34 of that document.
Sep
17
awarded  Commentator
Sep
17
comment How do I determine/control which heat source is used (heat pump, oil)
Yes the information is in that Technician manual. It wasn't in the user manual. Thank you.
Sep
17
awarded  Editor
Sep
17
revised How do I determine/control which heat source is used (heat pump, oil)
added 15 characters in body
Sep
17
asked How do I determine/control which heat source is used (heat pump, oil)
Aug
14
comment Sanding, Blasting, or chemical for paint removal from old metal cabinets?
I think you are right it might just be steel, not stainless steel. But it is still beautiful "raw", and I'd like to remove the paint. I've never heard of electro-static. Is that a removal or adhesive? I'll bing it now... - Aha! We'll probably re-paint some of the cabinets, but the lower ones look good as steel, so electro-static doesn't help here...