Insulation, Radiant and Vapor Barriers - Rigid foam
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09-02-01, 05:38 AM
I have a 2 handle faucet in my bathroom. when the hot water is on slow the pipes rattle and hum. when iturn cold water on to the mix 'the noise goes away. HELP
THANK YOU
THANK YOU
10-16-01, 05:34 AM
We are in the process of insulating the attic in our 200 year old home. Due to the rafter depth and different widths between the rafters, fiberglass insulation is not working too well. We do not have the available space in the attic to add 2x2s to the rafters and realize we shouldn't be squeezing the insulation between and into the rafters. What is rigid foam insulation? Any information (ie, R-value, ease in use, appropriateness as sole insulation, etc) would be appreciated.
rbisys
10-20-01, 03:27 PM
Greetings, HughEric
The answer to your problem is the second option I gave Michael T Stark (exposed rafters) in the "attic" section, dated 10/05.
Briefly, the problem is two fold.
1. The fiber glass is about 99% air space and over 90% of the heat energy in the ceiling is radiant heat which passes, quite readily, thu it.
2. Your rafters are also conducting a large quanity of heat energy, especially if expose to direct sun lite. Keep in mind that your roof surface area plus any gable wall section is going to increase the radiating surface at least 25% over a flat roof situation. Shingle temps can get up to about 200 degs. The Stark answer isolates the rafters from the room.
There are other uses for the inulation I recommended to Stark to make your home more efficient.
Thank you for considering my opinion.
Foam is about 20% efficient, fiberglass about 10%. The foam will not help.
The answer to your problem is the second option I gave Michael T Stark (exposed rafters) in the "attic" section, dated 10/05.
Briefly, the problem is two fold.
1. The fiber glass is about 99% air space and over 90% of the heat energy in the ceiling is radiant heat which passes, quite readily, thu it.
2. Your rafters are also conducting a large quanity of heat energy, especially if expose to direct sun lite. Keep in mind that your roof surface area plus any gable wall section is going to increase the radiating surface at least 25% over a flat roof situation. Shingle temps can get up to about 200 degs. The Stark answer isolates the rafters from the room.
There are other uses for the inulation I recommended to Stark to make your home more efficient.
Thank you for considering my opinion.
Foam is about 20% efficient, fiberglass about 10%. The foam will not help.
11-03-01, 03:29 AM
You may want to consider spray applied polyurethane foam insulation.
an R-6 to R-7 per inch is available depending on the foam manufacturer.
you could obtain an R-30+ in a 2x6 depth.
you should baffle the eve's to ridge to keep your shingle warranty intact.
spray applied, an effective air infiltration barrier is formed. realize that the Dept of Energy states that 40% of heat loss is through air infiltration.
the major foam system applicators and distributors will tell you that foam is extremely efficient in the reduction of heat/cooling loss via conduction/convection once wind is working on the structure. we are seeing this in real life in our applications, and our customers are impressed with their energy costs.
let me know if i can provide you further assistance
mark :)
an R-6 to R-7 per inch is available depending on the foam manufacturer.
you could obtain an R-30+ in a 2x6 depth.
you should baffle the eve's to ridge to keep your shingle warranty intact.
spray applied, an effective air infiltration barrier is formed. realize that the Dept of Energy states that 40% of heat loss is through air infiltration.
the major foam system applicators and distributors will tell you that foam is extremely efficient in the reduction of heat/cooling loss via conduction/convection once wind is working on the structure. we are seeing this in real life in our applications, and our customers are impressed with their energy costs.
let me know if i can provide you further assistance
mark :)