New Tyvek Over Old Tyvek?

MALCO.New.York

Screw reading.....Do it! I wanna know. REAL data.

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mics_54

If I posted the data...you'd have to read it. Or maybe you wanted a picture of water vapor escaping.

Tom Struble

i actually have a tyvek installation manual and nowhere does it say the printed side towards the house

Forry

Called Tyvek about that once, they said it didn't matter.

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mics_54

I stand corrected. Thought I recalled the tyvek tech say it was directional at a seminar I attended for continuing education classes for my annual credits. The only directional properties seems to be regarding the tyvek drain wrap.

In any event I only use it when I have to because I am somewhat skeptical of its value to cost ratio.

BTW the installation specs do indicate that damaged tyvek doesnt need to be removed and can be covered with a second layer.

Roy Rowlett

Dont forget to put the tyvek right side up or it will leak.

strathd

Uhhhhhhhhhh Roy, I would think the tyvek is allready on. We try not to raise old threads here. S'allright dude.

Dave Ruc

I am a little confused as to how there could have been such a long debate on the Tyvek issue. Has not everyone here used tyvek often or simply not known why they were using it? Either answer is rather disturbing for the "Siding, window, and door" Contractor Forum.

The reason that Tyvek is now standard instead of tar paper is because it allows Water Vapor to excrete while stopping liquid form H2O from reaching the sub siding. Vapor beariers are unneccessary and even destructive to your home and health when applied to the sub siding. Yes that has finally been covered and after a trip to the DuPont website it was finalized but C'mon! Has noone ever had to answer the question of why they are applying it to a homeowners home or even your own? Does everyone here know why you install products and in what way?

I am not intending on comming off rude so please forgive me if I am. I Simply don't understand why there was such a debate on a Forum for Proffessional Tyvek installers that handle it every day.

Tom Struble

i guess just you know everthing Dave

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Tom

jumbo

Jer, I myself would remove the old just so I had a smoother surface for snapping lines. I have been bombarded with Certainteed warranty issues this summer. They're having alot of shrinkage issues. Good luck with the shoulder (I too am a surgery statistic). Mine hasn't healed very well.

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Tom Struble

sorry to hear bout the bad wing Jumbo

i know of a few guys with that rotator cuff thing

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Tom

woodworkbykirk

on a similar note, just around the corner from my latest job there is a 2nd storey addition being put up, after it was framed they tyvek'd the place . taped it , no issue, standard procedure. however after the tyvek was complete they then go on to put 1" type 2 foam on and then tape the seams.... vinyl is going on for siding but what kinda problems are these creating by putting a vapour barrior over top of the air barrier?

we put up type 2 foam on every house we do, only spots we tape are windows, doors and where roof lines tie in along with using vycor all other seams we let breath. then we tyvek. are these guys trying to copy our technique only doing it bass ackwards and wrong or are they onto something building officials are expecting now?

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Tom Struble

i agree Kirk,in fact ill go 1 further and say the foam is actually a sheathing extension

all windows and doors should be installed on furring the same thickness on the foam ,then the house wrap

its really the only way to maintain a decent drainage plane imo

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Tom

nEighter

if they will even call you back. Tried to get ahold of tyvek and they gave me my area's rep. He then tells me he would call me back because he was on the other line. I never got a call back. I DID call HIM and left a message to let him know that I would use a competitors brand or even just go with the trusted tarpaper cause he blew me off..

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Dave Ruc

You are supposed to tape all seams of 1" foam board tounge and groove or not (At least in Upstate NY) However, I have had issues with interior mold as well of several other local companies which is easily solved by not taping with the exceptions of major water run off areas. I use 1" Dow board myself and they call for taping of all seams however like I said, I have run into more issues taping than not.

cbfx3

Dave Ruc

Indeed Haha!