Home |
Search |
Today's Posts |
|
Home Repair (alt.home.repair) For all homeowners and DIYers with many experienced tradesmen. Solve your toughest home fix-it problems. |
Reply |
|
LinkBack | Thread Tools | Display Modes |
#1
Posted to alt.home.repair
|
|||
|
|||
Insulating under floor
Got my crawl space dug out so I can move around. Want to insulate w/ R19
bats. Joists are 2x6 approx. 24 inches on center. What's the best way to hold up the insulation? Can't staple the flanges since they need to face up towards the heated surface. Can't use the "wire struts" since the 24" on center is only approximate. (± 1/2 inch). Was considering cutting strips of Mylar and stapling them to the studs under the insulation. Any other thoughts???? Thanks!!! Ivan Vegvary |
#2
Posted to alt.home.repair
|
|||
|
|||
Insulating under floor
On Oct 16, 12:36*am, "Ivan Vegvary" wrote:
Got my crawl space dug out so I can move around. *Want to insulate w/ R19 bats. *Joists are 2x6 approx. 24 inches on center. *What's the best way to hold up the insulation? *Can't staple the flanges since they need to face up towards the heated surface. *Can't use the "wire struts" since the 24" on center is only approximate. *(± 1/2 inch). *Was considering cutting strips of Mylar and stapling them to the studs under the insulation. Any other thoughts???? Thanks!!! Ivan Vegvary The wires don't need to be precise fit. They bend, spring like. All you need are wires longer than the largest distance. You can even use them diagonally. |
#3
Posted to alt.home.repair
|
|||
|
|||
Insulating under floor
"Ivan Vegvary" wrote:
Got my crawl space dug out so I can move around. Want to insulate w/ R19 bats. Joists are 2x6 approx. 24 inches on center. What's the best way to hold up the insulation? Can't staple the flanges since they need to face up towards the heated surface. Can't use the "wire struts" since the 24" on center is only approximate. (± 1/2 inch). Was considering cutting strips of Mylar and stapling them to the studs under the insulation. The -1/2 is no problem, but if the spacing is over 24 those wires don't hold well. How about stapling chicken wire across perpendicular to the joists? Jim |
#4
Posted to alt.home.repair
|
|||
|
|||
Insulating under floor
On Oct 16, 12:36�am, "Ivan Vegvary" wrote:
Got my crawl space dug out so I can move around. �Want to insulate w/ R19 bats. �Joists are 2x6 approx. 24 inches on center. �What's the best way to hold up the insulation? �Can't staple the flanges since they need to face up towards the heated surface. �Can't use the "wire struts" since the 24" on center is only approximate. �(� 1/2 inch). �Was considering cutting strips of Mylar and stapling them to the studs under the insulation. Any other thoughts???? Thanks!!! Ivan Vegvary If you EVER have moisture issues, fiberglass batts are a bad choice. once they get moist their R value drops a lot. closed cell expanding spray foam costs more but isnt effected by moisture |
#5
Posted to alt.home.repair
|
|||
|
|||
Insulating under floor
On Oct 15, 11:36*pm, "Ivan Vegvary" wrote:
Got my crawl space dug out so I can move around. *Want to insulate w/ R19 bats. *Joists are 2x6 approx. 24 inches on center. *What's the best way to hold up the insulation? *Can't staple the flanges since they need to face up towards the heated surface. *Can't use the "wire struts" since the 24" on center is only approximate. *(± 1/2 inch). *Was considering cutting strips of Mylar and stapling them to the studs under the insulation. Any other thoughts???? Thanks!!! Ivan Vegvary The flange is stapled and at the bottom you keeping moisture from entering, dont think everybody has beeen doing it wrong on millions of houses for decades. |
#6
Posted to alt.home.repair
|
|||
|
|||
Insulating under floor
"Jim Elbrecht" wrote in message ... "Ivan Vegvary" wrote: Got my crawl space dug out so I can move around. Want to insulate w/ R19 bats. Joists are 2x6 approx. 24 inches on center. What's the best way to hold up the insulation? Can't staple the flanges since they need to face up towards the heated surface. Can't use the "wire struts" since the 24" on center is only approximate. (± 1/2 inch). Was considering cutting strips of Mylar and stapling them to the studs under the insulation. The -1/2 is no problem, but if the spacing is over 24 those wires don't hold well. How about stapling chicken wire across perpendicular to the joists? No matter how you put them up, you need chicken wire with small openings stapled over the insulation to keep small animals out as they love to nest in accessible insulation. The paper flanges won't keep anything out. They can make quite a mess. |
#7
Posted to alt.home.repair
|
|||
|
|||
Insulating under floor
Ivan Vegvary wrote:
Got my crawl space dug out so I can move around. Want to insulate w/ R19 bats. Joists are 2x6 approx. 24 inches on center. What's the best way to hold up the insulation? Can't staple the flanges since they need to face up towards the heated surface. Can't use the "wire struts" since the 24" on center is only approximate. (? 1/2 inch). Was considering cutting strips of Mylar and stapling them to the studs under the insulation. Any other thoughts???? Thanks!!! Ivan Vegvary Hi, Friction fit will do. I did it at my cabin crawl space and no bats fell off. I used R20 fiberglass bats 16 in. OC between joist. |
#8
Posted to alt.home.repair
|
|||
|
|||
Insulating under floor
In article s.com,
"EXT" wrote: "Jim Elbrecht" wrote in message ... "Ivan Vegvary" wrote: Got my crawl space dug out so I can move around. Want to insulate w/ R19 bats. Joists are 2x6 approx. 24 inches on center. What's the best way to hold up the insulation? Can't staple the flanges since they need to face up towards the heated surface. Can't use the "wire struts" since the 24" on center is only approximate. (± 1/2 inch). Was considering cutting strips of Mylar and stapling them to the studs under the insulation. The -1/2 is no problem, but if the spacing is over 24 those wires don't hold well. How about stapling chicken wire across perpendicular to the joists? No matter how you put them up, you need chicken wire with small openings stapled over the insulation to keep small animals out as they love to nest in accessible insulation. The paper flanges won't keep anything out. They can make quite a mess. Hmm, he's talking about a ceiling I think. Wouldn't gravity discourage nesting? |
#9
Posted to alt.home.repair
|
|||
|
|||
Insulating under floor
On Oct 16, 7:28*am, " wrote:
On Oct 16, 12:36 am, "Ivan Vegvary" wrote: Got my crawl space dug out so I can move around. Want to insulate w/ R19 bats. Joists are 2x6 approx. 24 inches on center. What's the best way to hold up the insulation? Can't staple the flanges since they need to face up towards the heated surface. Can't use the "wire struts" since the 24" on center is only approximate. ( 1/2 inch). Was considering cutting strips of Mylar and stapling them to the studs under the insulation. Any other thoughts???? Thanks!!! Ivan Vegvary If you EVER have moisture issues, fiberglass batts are a bad choice. once they get moist their R value drops a lot. closed cell expanding spray foam costs more but isnt effected by moisture With fiberglass R value drops proportionatly as it gets colder below 32f, at -20 it might be 20-35% less effective, Foam excells in keeping R value stable, it also doesnt settle. R value can be double that of fiberglass, it keeps out moisture from your home and cold or hot air infiltration. It should be painted to keep from oxidising and covered in small wire as rodents will burrow. R 7 foam may be 3 times as effective per inch, than fiberglass at cold temps. But there are many types of foam to pick. |
#10
Posted to alt.home.repair
|
|||
|
|||
Insulating under floor
Smitty Two wrote:
In article s.com, "EXT" wrote: "Jim Elbrecht" wrote in message ... "Ivan Vegvary" wrote: Got my crawl space dug out so I can move around. Want to insulate w/ R19 bats. Joists are 2x6 approx. 24 inches on center. What's the best way to hold up the insulation? Can't staple the flanges since they need to face up towards the heated surface. Can't use the "wire struts" since the 24" on center is only approximate. (? 1/2 inch). Was considering cutting strips of Mylar and stapling them to the studs under the insulation. The -1/2 is no problem, but if the spacing is over 24 those wires don't hold well. How about stapling chicken wire across perpendicular to the joists? No matter how you put them up, you need chicken wire with small openings stapled over the insulation to keep small animals out as they love to nest in accessible insulation. The paper flanges won't keep anything out. They can make quite a mess. Hmm, he's talking about a ceiling I think. Wouldn't gravity discourage nesting? Hmmm, As the title says, what does "insulating under floor" means? You must be standing on your head, LOL! |
#11
Posted to alt.home.repair
|
|||
|
|||
Insulating under floor
In article ,
Tony Hwang wrote: Smitty Two wrote: In article s.com, "EXT" wrote: "Jim Elbrecht" wrote in message ... "Ivan Vegvary" wrote: Got my crawl space dug out so I can move around. Want to insulate w/ R19 bats. Joists are 2x6 approx. 24 inches on center. What's the best way to hold up the insulation? Can't staple the flanges since they need to face up towards the heated surface. Can't use the "wire struts" since the 24" on center is only approximate. (? 1/2 inch). Was considering cutting strips of Mylar and stapling them to the studs under the insulation. The -1/2 is no problem, but if the spacing is over 24 those wires don't hold well. How about stapling chicken wire across perpendicular to the joists? No matter how you put them up, you need chicken wire with small openings stapled over the insulation to keep small animals out as they love to nest in accessible insulation. The paper flanges won't keep anything out. They can make quite a mess. Hmm, he's talking about a ceiling I think. Wouldn't gravity discourage nesting? Hmmm, As the title says, what does "insulating under floor" means? You must be standing on your head, LOL! Yep, under the floor. Around here, we call that the ceiling of the space underneath, be that a cellar, first floor, or, in this case, excavated crawl space. |
#12
Posted to alt.home.repair
|
|||
|
|||
Insulating under floor
On Oct 16, 5:36 am, "Ivan Vegvary" wrote:
Got my crawl space dug out so I can move around. Want to insulate w/ R19 bats. Joists are 2x6 approx. 24 inches on center. What's the best way to hold up the insulation? Can't staple the flanges since they need to face up towards the heated surface. Can't use the "wire struts" since the 24" on center is only approximate. (± 1/2 inch). Was considering cutting strips of Mylar and stapling them to the studs under the insulation. Any other thoughts???? Thanks!!! Ivan Vegvary Polystyrene or similar pushed in as a tight fit will do the job. You need at least five inches thick to do a proper job.You must ensure that you leave no holes, as heat always moves to cold and your heat will move out through those holes. Then the problem is that the floor and joists are poor insulators in comparison to polystyrene and your heat will leak out through the wood joists. The best solution the that is insulate above the floor. Perry |
#13
Posted to alt.home.repair
|
|||
|
|||
Insulating under floor
On Oct 16, 1:07*pm, PerryOne wrote:
On Oct 16, 5:36 am, "Ivan Vegvary" wrote: Got my crawl space dug out so I can move around. *Want to insulate w/ R19 bats. *Joists are 2x6 approx. 24 inches on center. *What's the best way to hold up the insulation? *Can't staple the flanges since they need to face up towards the heated surface. *Can't use the "wire struts" since the 24" on center is only approximate. *(± 1/2 inch). *Was considering cutting strips of Mylar and stapling them to the studs under the insulation. Any other thoughts???? Thanks!!! Ivan Vegvary Polystyrene or similar pushed in as a tight fit will do the job. You need at least five inches thick to do a proper job.You must ensure that you leave no holes, as heat always moves to cold and your heat will move out through those holes. Then the problem is that the floor and joists are poor insulators in comparison to polystyrene and your heat will leak out through the wood joists. The best solution the that is insulate above the floor. Perry Wood had a fairly high r value it is not a poor insulator. Insulate above the floor, that idea is a laugh. His heat wont "leak out" the joists, even less so than fiberglass batts. Go look at log home R values. He has about 6.5" of wood. |
#14
Posted to alt.home.repair
|
|||
|
|||
Insulating under floor
"ransley" wrote in message ... On Oct 15, 11:36 pm, "Ivan Vegvary" wrote: Got my crawl space dug out so I can move around. Want to insulate w/ R19 bats. Joists are 2x6 approx. 24 inches on center. What's the best way to hold up the insulation? Can't staple the flanges since they need to face up towards the heated surface. Can't use the "wire struts" since the 24" on center is only approximate. (± 1/2 inch). Was considering cutting strips of Mylar and stapling them to the studs under the insulation. Any other thoughts???? Thanks!!! Ivan Vegvary The flange is stapled and at the bottom you keeping moisture from entering, dont think everybody has beeen doing it wrong on millions of houses for decades. Thanks Ransley, This is in a crawspace between the first floor and earth. I would love to simply staple the flanges BUT have been told the 'paper' always goes up toward the conditioned (heated living space) side of the space. What gives? Can I install it "paper down"? Thanks, Ivan Vegvary |
#15
Posted to alt.home.repair
|
|||
|
|||
Insulating under floor
1x2s work good. Or even some landscape fabric. It breathes well. or both
s "Ivan Vegvary" wrote in message ... Got my crawl space dug out so I can move around. Want to insulate w/ R19 bats. Joists are 2x6 approx. 24 inches on center. What's the best way to hold up the insulation? Can't staple the flanges since they need to face up towards the heated surface. Can't use the "wire struts" since the 24" on center is only approximate. (± 1/2 inch). Was considering cutting strips of Mylar and stapling them to the studs under the insulation. Any other thoughts???? Thanks!!! Ivan Vegvary |
#16
Posted to alt.home.repair
|
|||
|
|||
Insulating under floor
On Oct 16, 2:24*pm, "Ivan Vegvary" wrote:
"ransley" wrote in message ... On Oct 15, 11:36 pm, "Ivan Vegvary" wrote: Got my crawl space dug out so I can move around. Want to insulate w/ R19 bats. Joists are 2x6 approx. 24 inches on center. What's the best way to hold up the insulation? Can't staple the flanges since they need to face up towards the heated surface. Can't use the "wire struts" since the 24" on center is only approximate. (± 1/2 inch). Was considering cutting strips of Mylar and stapling them to the studs under the insulation. Any other thoughts???? Thanks!!! Ivan Vegvary The flange is stapled and at the bottom you keeping moisture from entering, dont think everybody has beeen doing it wrong on millions of houses for decades. Thanks Ransley, This is in a crawspace between the first floor and earth. *I would love to simply staple the flanges BUT have been told the 'paper' always goes up toward the conditioned (heated living space) side of the space. *What gives? Can I install it "paper down"? Thanks, Ivan Vegvary In the attic heat rises so does moisture, in a damp crawl moisture and cold incomming air rises to your inside. Ive seen quite alot of crawl spaces and open buildings where it was done this way with no issues, and mine maybe 80 years ago, but crawl spaces were dry, its the only easy logical way to do it, and the paper down keeps air from going up through easily. Read about how fiberglass looses efectivness at very cold temps, paper down could help that issue. The Attic issue is to keep attic wood dry so you dont mold then rot your roof away in a few years with tight attics. Celulose and unfaced insulation without vapor barrier are used all the time in attics. Staple it and be done, but foam is really best if you have the $ |
#17
Posted to alt.home.repair
|
|||
|
|||
Insulating under floor
Smitty Two wrote:
In article s.com, "EXT" wrote: "Jim Elbrecht" wrote in message ... "Ivan Vegvary" wrote: Got my crawl space dug out so I can move around. Want to insulate w/ R19 bats. Joists are 2x6 approx. 24 inches on center. What's the best way to hold up the insulation? Can't staple the flanges since they need to face up towards the heated surface. Can't use the "wire struts" since the 24" on center is only approximate. (± 1/2 inch). Was considering cutting strips of Mylar and stapling them to the studs under the insulation. The -1/2 is no problem, but if the spacing is over 24 those wires don't hold well. How about stapling chicken wire across perpendicular to the joists? No matter how you put them up, you need chicken wire with small openings stapled over the insulation to keep small animals out as they love to nest in accessible insulation. The paper flanges won't keep anything out. They can make quite a mess. Hmm, he's talking about a ceiling I think. Wouldn't gravity discourage nesting? Mice and bugs and spiders and such, will happily nest in overhead fiberglass. It easily supports their trivial weight. As long as they have a non-slippery path up there, they will move right in. I found wads of fiberglas in the drawers of this desk, where the mice carried it on their way upstairs since they were passing through the crawlspace. -- aem sends.... |
#18
Posted to alt.home.repair
|
|||
|
|||
Insulating under floor
aemeijers wrote:
Mice and bugs and spiders and such, will happily nest in overhead fiberglass. It easily supports their trivial weight. As long as they have a non-slippery path up there, they will move right in. I found wads of fiberglas in the drawers of this desk, where the mice carried it on their way upstairs since they were passing through the crawlspace. That's been my experience as well. One year old house, crawlspace, fiberglass between the trusses. Pulled the fiberglass down to spray some foam insulation under a tile floor bathroom and found lots of mouse turds in the glass. |
#19
Posted to alt.home.repair
|
|||
|
|||
Insulating under floor
Smitty Two wrote:
In article , Tony Hwang wrote: Smitty Two wrote: In article s.com, "EXT" wrote: "Jim Elbrecht" wrote in message ... "Ivan Vegvary" wrote: Got my crawl space dug out so I can move around. Want to insulate w/ R19 bats. Joists are 2x6 approx. 24 inches on center. What's the best way to hold up the insulation? Can't staple the flanges since they need to face up towards the heated surface. Can't use the "wire struts" since the 24" on center is only approximate. (? 1/2 inch). Was considering cutting strips of Mylar and stapling them to the studs under the insulation. The -1/2 is no problem, but if the spacing is over 24 those wires don't hold well. How about stapling chicken wire across perpendicular to the joists? No matter how you put them up, you need chicken wire with small openings stapled over the insulation to keep small animals out as they love to nest in accessible insulation. The paper flanges won't keep anything out. They can make quite a mess. Hmm, he's talking about a ceiling I think. Wouldn't gravity discourage nesting? Hmmm, As the title says, what does "insulating under floor" means? You must be standing on your head, LOL! Yep, under the floor. Around here, we call that the ceiling of the space underneath, be that a cellar, first floor, or, in this case, excavated crawl space. Hi, It main floor here. I never lived in a house with crawl space. Always full concrete basement. |
Reply |
Thread Tools | Search this Thread |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Forum | |||
Insulating a floor? | Home Repair | |||
Insulating below a floor | Home Repair | |||
Insulating floor joists? | Home Repair | |||
Insulating a raised floor ?? | UK diy | |||
Insulating basement floor | Home Repair |