TYVEK vs Felt paper--which is better??? - Page 3 - Contractor Talk - Professional Construction and Remodeling Forum

MJW · 06-05-2009, 06:38 AM

Quote:

Originally Posted by tinner666

Glad to hear you put metal under there. Word from the building department here is that they're going to adopt all my reccomendations soon. Not sure what that means, because they went overboard in Va. with my Ice and Storm specs a few years back. Now, they seem to want it everywhere..
Kinda scary what committees come up with.

Yes, because they are so narrow minded. You mention a good idea and BAM "you have to do this on every house from now on"

Weather, direction, materials, EVERYthing plays a factor..........Although we had one inspector say, "well you don't have to go overboard...you can apply some common sense"

Common sense!!!! That left the building when we decided to let people make building codes that sit at a desk all day. Some of this stuff, I tell ya.....

kubie · 07-24-2009, 06:07 AM

wont the felt paper get too hot and warp vinyl siding. vinyl is what most people around here use.

also we are told not to tape/flash the bottom of the window so any moisture can get out from behind the tyvek.

we mostly use typar on our jobs, but alot of builders use tyvek. i havent seen any one use felt paper on walls in a long time

**loneframer** · 07-24-2009, 04:58 PM

Quote:

Originally Posted by kubie

wont the felt paper get too hot and warp vinyl siding. vinyl is what most people around here use.

also we are told not to tape/flash the bottom of the window so any moisture can get out from behind the tyvek.

we mostly use typar on our jobs, but alot of builders use tyvek. i havent seen any one use felt paper on walls in a long time

I haven't used anything but #30 felt paper in the last 13 years at least. I haven't seen the siding distort on any of them.

**loneframer** · 07-24-2009, 05:02 PM

few more

tomstruble · 07-24-2009, 06:22 PM

that was just a way for the supplies to push house wraps,they also said that about reflective layers on foam

kubie · 07-24-2009, 06:29 PM

thats good to know about the felt

just wonder what the manufactures of housewrap say? and if they have us around their little finger

Sidingmaster · 07-24-2009, 08:45 PM

Source:
http://www.buildingsciencecorporation.com

A tar paper has some moisture storage capacity, whereas a housewrap has none. Installing a tar paper between cedar siding and a foam sheathing will provide better performance than installing a housewrap since the tar paper will facilitate some modest hygric redistribution. However, an air space works far better than a tar paper. In most applications that I have seen, tar paper by itself (without an air space), does not prevent the cupping, splitting and paint peeling associated with cedar siding over foil faced foam sheathings. Also, the tar paper may not if it stays wet. If the tar paper rots, watch out, the siding will rot as well.

tomstruble · 07-24-2009, 10:26 PM

i can agree with that Sidingmaster

Morning Wood · 07-25-2009, 06:26 AM

As felt gets wet its permeability gets better. I'm still not sure what I prefer using. I think if your are going to wrap a house and have it sit for awhile before sididng, then your best bet is house wrap. It just holds up better. But, if you are going gang busters than I'd use 30# felt. All air sealing should be done at the sheathing anyway, not house wrap. I try to install rain screen on any siding I do, and I'm slow so I usually end up using house wrap. I don't do vinyl or aluminum siding.