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House Wrap

J

john in la

Well-known Member
Location
What part of in La do you not understand
Can someone explain to me why I want to spend $140 for a roll of Tyvek when you can get store brand for half the price.
There has to be more than just brand name pricing with that much of price gap.
I assuming while they may be similar products they are not really the same stuff.

And yes this is tractor shed related.
 
Here there are several brands of house wrap that will pass code. All will stop air infiltration and prevent water damage to the sheathing while allowing moisture to escape the structure.
To me it was all about who did I want to advertise for since your building is one giant billboard for the stuff till you get the siding on.
Needless to say I did not use Menards brand though it's probably cheaper.


cvphoto1985.jpg
 
Uh-oh. You didn?t use the brand recommended plastic cap/ staple fastener.
I?ve used several kinds. There are more styles and more confusion now then ever. If you have siding you can use brand T, but if you have stucco you use brand T with wrinkles. Then there is spray on, roll on, pre bonded which just gets seam tape..... Every official has his own take when interpreting code.
When I was a young carpenter we used tar paper used wood siding. Those before us to used tar paper and red rosin. I could show you an old gas station building Grandpa built 90 years ago with red rosin under wood siding and the rosin is still in place. But this is a small building that didn?t see the heating/ cooling dynamics that a house does.
 
(quoted from post at 02:17:56 04/19/20) Uh-oh. You didn?t use the brand recommended plastic cap/ staple fastener.
I?ve used several kinds. There are more styles and more confusion now then ever. If you have siding you can use brand T, but if you have stucco you use brand T with wrinkles. Then there is spray on, roll on, pre bonded which just gets seam tape..... Every official has his own take when interpreting code.
When I was a young carpenter we used tar paper used wood siding. Those before us to used tar paper and red rosin. I could show you an old gas station building Grandpa built 90 years ago with red rosin under wood siding and the rosin is still in place. But this is a small building that didn?t see the heating/ cooling dynamics that a house does.
Click to expand...


I used red rosin on an addition 45 years ago. I bet that it is still there but I wouldn't vouch for how well it blocks infiltration.
 
I ve used both tyvek and menards store brand wrap. Tyvek seems to be stronger and the seams tape easier but either one probably works but I prefer tyvek.
 
I use whatever Menards sells when I built an additional on house over 10 years ago. No problem so far.

When it comes to buying store brand food vs brand name an associate at Walmart showed me they are made by the same company at cheaper price. I can't tell any difference in quality.

In some cases buying cheap can goods at discount stores taste better.

I'm cheap and many times buy the cheap stuff

George
 
you need to check the permeability ratings to make a comparison along with tear strength and other physical characteristics
I have used 15# felt my whole life for roofs and siding
 
With a little poking around on the net I think I may have answered my own question.

Lets assume this guy was paid by Tyvek to do this test so it may be a bias point of view.


https://www.youtube.com/watch?v=T55CEuKfdP8


But I also found this and I doubt these guys are paid by Tyvek to do this.
We can write off the first part of the video to poor installation so watch the last half of the video.


https://www.youtube.com/watch?v=qr0yMNUfNSE


I am about ready to just go with the tried and proven product called Tar Paper.
 
(quoted from post at 08:52:46 04/19/20) I use whatever Menards sells when I built an additional on house over 10 years ago. No problem so far.

When it comes to buying store brand food vs brand name an associate at Walmart showed me they are made by the same company at cheaper price. I can't tell any difference in quality.

In some cases buying cheap can goods at discount stores taste better.

I'm cheap and many times buy the cheap stuff

George
Click to expand...
There are fruit and veggie canneries and frozen food companies in my hometown.
Whatever they were processing that was not pre-sold would go into unlabeled cans and containers with only code numbers.

To be sold to whoever bought by the truck load with whatever brand label the buyer wanted.

No difference in product whatsoever.

Thank You brand was one of them.
 
I have used Tyvek and Menards wrap, you can definitely tell a difference it the material. I have not used other off brands, so no comparison there.
 
I did a water test on 2 brands. Don?t remember the one that didn?t let water through.
I was told if you Wraped your house in plastic it would rot the wood. I also so a persons
House that was tyvaced and assume the inside was not seal with vapour barrier properly.
The osb was rotted after 15 years. I assume the tyvak could not let out the moisture.
I know in my test I made a basket and filled with water. 1 dripped very slow
That other I had to squeeze to get any out.
 
There isn't much difference in brand so I would use the store brand. The stuff doesn't do much anyway, you could get almost as much benefit by using polyethylene plastic if you can get the siding on before it rots. The house wrap just holds up to the sun and wind better.
 
Tried a lot of different ones in my 40+ years of new home construction. My conclusion was to go with the Tyveck. Wrap a house with some of the others and let it set for a month or so and see what happens to the wrap. The Tyveck is pretty strong stuff. What I thought was a joke was some of the plastic like wraps that had perforations like pin holes in it to let it "breath". Sometimes you get what you pay for.
 
Vapor barrier on both sides of an insulated cavity is a no no and will promote mold. Building paper is not a vapor barrier, Polyethylene is. If it is insulated you want one vapor barrier either one side or the other of the insulated cavity. Typically it is placed on the heated side of the assembly because the warm side of the insulated space does not promote condensation on that side and lessens the chance of mold. If spray foam is used it changes this dynamic. Open cell foam still requires a vapor barrier. Closed cell does not.

Masonry assemblies have moved toward a spray on air barrier outside and insulating foam on the exterior. Steel studs are tough because of the cold transfer of the stud through the insulation. The latest trend is spray foam cavity with foam board exterior behind exterior finish, but this affects the sheathing between the 2 foams. I?ve seen most recently only air barrier and foam at the exterior to move the dee point away from the sheathing envelope.

With all my babble it ultimately depends on the type of assembly and the use of the space. A shed will perform different then a residence or a commercial use building.
 
Stephen; you do not understand how house wrap functions. It allows interior moisture to exit the dwelling and prevents outside moisture and air from penetrating the building. Also as another poster mentioned vapor barrier on both sides of an exterior wall is a definite NoNo.-------------Loren
PS The place that sells the house brand may discount the wrap because their name is plastered all over it, and a new house is a BIG billboard.
 
(quoted from post at 09:37:27 04/19/20)
(quoted from post at 08:52:46 04/19/20) I use whatever Menards sells when I built an additional on house over 10 years ago. No problem so far.

When it comes to buying store brand food vs brand name an associate at Walmart showed me they are made by the same company at cheaper price. I can't tell any difference in quality.

In some cases buying cheap can goods at discount stores taste better.

I'm cheap and many times buy the cheap stuff

George
Click to expand...
There are fruit and veggie canneries and frozen food companies in my hometown.
Whatever they were processing that was not pre-sold would go into unlabeled cans and containers with only code numbers.

To be sold to whoever bought by the truck load with whatever brand label the buyer wanted.

No difference in product whatsoever.

Thank You brand was one of them.
Click to expand...

Unless a blind taste is performed , the results are slanted by the perception of wining by being cheap .
Check the ingredient list between brand name and no name . Usually no name has more salt, sugar , MSG and other "flavouring "
As for those of you that think all batteries , oil , fuel ,
Tires , wrap , paint, pants, dishwashers,
Cow feed etc are all identical .
News flash . All those products are built/blended per spec of whose ever brand label is going on the container .

https://www.blogtyrant.com/the-man-who-sold-the-brooklyn-bridge-twice-a-week-for-30-years/
 
tried others ended going back to Tyvek and their tape. have way more time to get I covered up also is where I really seen the difference, price not whole lot different and the rolls were larger. got it all at my local lumber yard.just make sure you compare apples to apples. but go with what works for you, me it was the tyvek
 
there are calculations that you can do on an exterior wall with heat and moisture on the inside--it is desirable to have every stage of construction be more permeable from inside to outside so the moisture doesn't condense too greatly---you can actually determine where the moisture will condense in the wall depending on materials, inside and outside temps, and relative humidity's
 
Never use plastic as house wrap.I helped tear down a house after the health department condemned it for mold. The previous owner
had wrapped the entire house and the underside of the floor with plastic. The family was sick all of the time and the health dept
came out looking for bad water and found mold.
 
(quoted from post at 09:57:38 04/19/20) tried others ended going back to Tyvek and their tape. have way more time to get I covered up also is where I really seen the difference, price not whole lot different and the rolls were larger. got it all at my local lumber yard.just make sure you compare apples to apples. but go with what works for you, me it was the tyvek
Click to expand...
I agree tyvek is stronger and their tape is better.
 
I do understand. I remodel homes for a living. The housewrap is more similar to a poly tarp or synthetic felt. You can hold up the four corners and it will hold water. They claim it allows moisture to escape but if it's that watertite how is moisture going to escape?
 
permeability of the fabric--moisture vapor is much smaller molecules than a water drop molecules--works almost like a check valve to only let moisture vapor out
 
Contrary to internet propaganda everything Is not made In one factory or to the exact same specs or same quality Of materials
 
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