Anybody have any experience with this? Multi layer reflective insulation? Currently we have an attic cat machine and plan to use both to compliment each other. Opinions?
buddy110
Buddy from what i understand its not very effective in our part of the country,i have no experience with it just going by what ive read from another forum,with enough ceiling insulation,attic temperatures are less important,there is also the possibility of moisture condensing on the foil
like i said just some info ive picked up
maybe run it past a building science pro
like i said just some info ive picked up
maybe run it past a building science pro
i understand its more cost effective to add insulation the ceiling and if your going to increases attic venting the radiant insulation becomes less important
you really have to look at things as total systems instead of supposed values of different components
and if i was investing in energy upgrade equipment i would seriously consider referring to people educated in building science instead of how we think things should work together
seat of the pants engineering some times can do more harm than good
and take the ''testimonials'' and the ''marketers research'' with a grain of salt
jmo
you really have to look at things as total systems instead of supposed values of different components
and if i was investing in energy upgrade equipment i would seriously consider referring to people educated in building science instead of how we think things should work together
seat of the pants engineering some times can do more harm than good
and take the ''testimonials'' and the ''marketers research'' with a grain of salt
jmo
no i checked the web site i understand what its supposed to do
Radiant barriers have been around for a long time
but they are only effective in specific places,other forms of more conventional insulation are probably more cost effective
did you know that tyvek has an attic wrap also?
we are all looking for that ''miracle''product that does it all
Radiant barriers have been around for a long time
but they are only effective in specific places,other forms of more conventional insulation are probably more cost effective
did you know that tyvek has an attic wrap also?
we are all looking for that ''miracle''product that does it all
foam doesn't let air pass to reach the dew point so moisture doesn't condense and yes with any insulation that match the r values of foam your probably going to need air exchangers
i didn't mean any offense with the smoke and mirrors comment
but if you don't know the science behind it,how do you know
where its effective,if it was the best thing since sliced bread you would see it allot more,like i said its been around in some form or another for more years than i know
but i guess its a high profit type of thing,and as long as you can control any kinds of condensation problems i guess it can't hurt
but i think it hasn't been proven to be cost effective in residential applications
in any case good luck with the new buisness:thumbup:
i didn't mean any offense with the smoke and mirrors comment
but if you don't know the science behind it,how do you know
where its effective,if it was the best thing since sliced bread you would see it allot more,like i said its been around in some form or another for more years than i know
but i guess its a high profit type of thing,and as long as you can control any kinds of condensation problems i guess it can't hurt
but i think it hasn't been proven to be cost effective in residential applications
in any case good luck with the new buisness:thumbup:
The Science Behind It
There are 3 ways that heat is transferred into or out of a home.
Conduction is the movement of heat through materials such as walls, glass, etc... foam, wool, fiber insulation slows down this transfer, but does not eliminate it.
Radiation (historically the most ignored transfer method in homes) is the transfer of heat in its most pure form, heat waves. This is the heat you can feel when you place your hand near a warm object or heat source. Use reflective barriers to send heat back to its source. Ever wondered why satelites are so shiny? Reflective barriers! Wonder what makes low-e glass more efficient? It's a reflective barrier!
A home that does not address all three of these transfer methods is not as efficient as it can be. Studies have shown that about 70% of heat loss in a home is due to radiation.
Consider this winter-time scenario in a typical home. Warm air rises and is collected along the ceiling. The drywall absorbs the heat and is passed along to the insulation in the attic. The insulation slows the transfer of heat to the attic, but it still lets much of it through (verify this yourself with a thermal leak detector on a cold night). The heat is radiated into the attic from the insulation and disapates into the cold air. Install a reflective barrier a couple of inches above the insulation and escaping heat is reflected back into the insulation, and ultimately, your home.
In summer it works the same, but in reverse. Heat radiated from your hot roof is reflected away from your ceiling.
Important notes for the DIY... ALWAYS leave an air space on both sides of the barrier. If you don't, heat will conduct through the barrier and your results will be less than optimal. NEVER seal edges and seams. Your structure needs to breathe.
There are 3 ways that heat is transferred into or out of a home.
- Convection
- Conduction
- Radiation
Conduction is the movement of heat through materials such as walls, glass, etc... foam, wool, fiber insulation slows down this transfer, but does not eliminate it.
Radiation (historically the most ignored transfer method in homes) is the transfer of heat in its most pure form, heat waves. This is the heat you can feel when you place your hand near a warm object or heat source. Use reflective barriers to send heat back to its source. Ever wondered why satelites are so shiny? Reflective barriers! Wonder what makes low-e glass more efficient? It's a reflective barrier!
A home that does not address all three of these transfer methods is not as efficient as it can be. Studies have shown that about 70% of heat loss in a home is due to radiation.
Consider this winter-time scenario in a typical home. Warm air rises and is collected along the ceiling. The drywall absorbs the heat and is passed along to the insulation in the attic. The insulation slows the transfer of heat to the attic, but it still lets much of it through (verify this yourself with a thermal leak detector on a cold night). The heat is radiated into the attic from the insulation and disapates into the cold air. Install a reflective barrier a couple of inches above the insulation and escaping heat is reflected back into the insulation, and ultimately, your home.
In summer it works the same, but in reverse. Heat radiated from your hot roof is reflected away from your ceiling.
Important notes for the DIY... ALWAYS leave an air space on both sides of the barrier. If you don't, heat will conduct through the barrier and your results will be less than optimal. NEVER seal edges and seams. Your structure needs to breathe.
i guess thsi stuff is like having lowE glass in your attic? if reflects radiant heat from the heater back into the home and in the summer reflecting the radiant heat back away from the home?
in the attic,does this stuff go on the floors or just the ceiling? can it be used anywhere else in the house?
in the attic,does this stuff go on the floors or just the ceiling? can it be used anywhere else in the house?
i firmly believe that the reflective barrier is going to be far more effective in retaining a cooler temperature in your home then trying to achieve a warmer one...in the case of trying to warm the home, it won't be cost effective...down south, where your cooling season is longer and more extreme, definately worth the investment
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