Question:
>….. I was thinking of insalling >this Reflectix insulation below the roof beams. The inside of my roof >has no insulation. . .
Of course it doesn’t. Unless you are planning to make the attic a heated area there is no reason to. You could go insulate your barn too but it still wouldn’t save much heat in the house! >Would I be better to just add a few rolls of R38 fiberglass to the attic >floor instead.
YES. No way at all that a thin metallic layer can be R-38. Ya know, fibreglas batt and roll insulation used to often come with foil backing. Don’t see it that much anymore. Yes, a given insulation plus a reflective surface would in theory perform marginally better than the same insulation with a ‘normal’ surface, but don’t confuse the tail with the dog. The reflective surface by itself is not a substitute for substantial underlying insulation. Don’t waste your money. Was this on an infomercial or something? regards, -v.
Response:
I live in and own a 2 story 3 bdrm bungalow style home that was built in1958.It has new closed cell foam insulation on the outside walls that are covered with vinal siding, it has R 19 fiberglass batt insulation on the attic floor between the support lumber.Considering that this is in Lincoln Ne and the winters can get severe. I was thinking of insalling this Reflectix insulation below the roof beams. The inside of my roof has no insulation.Reflectix is a thin metalic type insulation that claims to reflect heat back into the house and reflect the summer heat out. I estimate that if I stapled this stuff on my roof beams myself I could complete the project for less than $400. Would I be better to just add a few rolls of R38 fiberglass to the attic floor instead. and forget the reflective insulation on the roof inside?/? Any one here ever use Reflectix thermal insulation before. BTW one roll covers about 120 sq ft and cost $36 a roll so its higher priced than fiberglass. What option would be best.I do think that R19 is not enough for this climate. Byron http://community.webtv.net/lincbc/wwwlincbccom
Response:
I suspect the fiberglass will be better, but try posting on ALT.BUILDING.CONSTRUCTION I have gotten some good infor from that group.
– Hide quoted text — Show quoted text -> I live in and own a 2 story 3 bdrm bungalow style home that was built > in1958.It has new closed cell foam insulation on the outside walls that > are covered with vinal siding, it has R 19 fiberglass batt insulation on > the attic floor between the support lumber.Considering that this is in > Lincoln Ne and the winters can get severe. I was thinking of insalling > this Reflectix insulation below the roof beams. The inside of my roof > has no insulation.Reflectix is a thin metalic type insulation that > claims to reflect heat back into the house and reflect the summer heat > out. I estimate that if I stapled this stuff on my roof beams myself I > could complete the project for less than $400. > Would I be better to just add a few rolls of R38 fiberglass to the attic > floor instead. and forget the reflective insulation on the roof > inside?/? > Any one here ever use Reflectix thermal insulation before. BTW one roll > covers about 120 sq ft and cost $36 a roll so its higher priced than > fiberglass. > What option would be best.I do think that R19 is not enough for this > climate. > Byron > http://community.webtv.net/lincbc/wwwlincbccom
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