Plywood Vs Osb

HitchC&L

Ive had part of a sheet of 3/4 Advantech in the bed of my truck since last summer. Been out in the rain and snow the whole time. Still straight as the day I put it in there.

d.g.reynolds co

osb grows in the rain; with appropriate glue viscosity and press temperature there is no reason for a sheat of B.C. plwood to de-lam in three days of rain. I made plywood in Fort Nelson for two years, and they conducted de-lam tests every day.

d.g.reynolds co

sheet not sheat

RED HORSE 554

Osb 10 to 1 here all but eves this will need to remain plywood for aperance. Allthough i have found a plywood that workes great if solid coler painting http://www.olypanel.com/common/pdf/C...0-%2011-07.pdf this is the product that is used for freeway boards and signs weathers great and as well thay have this for form work and is reuseable good stuff. But i like osb for sheething ex.en. You will get a few rains before osb deflects.

DrewD

Advantech has a wax resin mixed in with the strands, this is what makes it so resistant against water/moisture. About the Zip Wall system, I have talked to a few contractors who have been using it and love it. You don't waste time applying house wrap, it is easier to flash, holds up much better in the rain. Only heard good things about it.

wmallock

advantec is osb but it has a 50 year warranty on it and weighs about twice as much does not seam to swell as quickly and i agree it is the shiznit basically all i use best bang for buck in my opinion

renoindallas

Is also a good option. It's at a good price point. It's "almost" as good as Advantech but better than Commodity OSB and Plywood.

So you get the 50 year warranty LIKE Advantech.

Quite honestly the main difference is the TopNotch 350 100 Day No Sand/Flaking warranty vs. Advantech's 300 Day No Sand/Edge Flaking etc. warranty.


USUALLY, you have bigger problems than a sub-floor if 100 days is not enough.

GP's DryPly is an excelent product but it's very expensive, even more than Advantech I think.

renoindallas

I may add that plywood twists and turns and cracks like any plywood would in my experience. I have also "drilled" holes for standing water.

TopNotch avoids this and is the only self draining sub-floor on the market.


We have used 1-1/8'' as well as 3/4''

A lot of old dogs are dying out with this beaten old-school mentality but just go to the American Plywood Association site. apa dot org I think....Has the exact swell rates and science.

Swell Tests

Plywood usually is around 10 percent
commodity OSB is around 8-10%
TopNotch 350 is 5-6%
Advantech is 3%

BKFranks

Anyone have a price comparison of standard OSB with house wrap or building paper compared to Advantech Zip wall?

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jaros bros.

Will probably never use osb or plywood anymore. Once Advantech came along, why would you use anything else?

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WarriorWithWood

price and availability.

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Timuhler

Advantech is the best subfloor hands down. We've used it many times and will use it again on the custom we are starting Monday. It isn't cheap though. We'll pay about $21 and change/sheet and the subfloor we have also had good success with (LP Orange) is about $14/sheet.

If you have not used Advantech before, you can get a rebate up to $900. Check out their website for more details.

The Huber rep came out to our jobsite a couple of weeks back and went over some of the info on Zip and Advantech. The subfloor has a 300 day no sanding guarantee

One point that might help mitigate the cost of the subfloor (for us it is a $750 upgrade) we always come back right before carpet and screw down the floor to minimize the potential for squeaks. With the nailing guide on the Advantech, I find that we miss very few nails and the floor is nice and squeak free. Use a decent ring or screw shank nail (.113" diameter) and I think we might be able to eliminate the step of coming back. That combined with the no swelling and the subfloor doesn't absorb moisture like OSB and Ply means that we have less time with dehumidifiers on the jobsite.

We had one house 2 years ago that we had 3 dehumidifiers going for about a month to get the moisture content down. That was not cheap. But it worked, the moisture was way down by the time we had framing inspection.

On that job we used the LP Orange and it performed just fine, but that was with the dehumidifiers going.



We used Zip http://www.zipsystem.com/on our last project and loved it. Absolutely loved it. We'll do it again on this job we are starting.



http://www.advantechperforms.com/dar...mparisons.aspx

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bconley

Tim,
Do you use felt over the zip wall system anyway?
It seems that and proper flashing details would prevent a lot of problems.

OSB grows mold so fast around here its not funny, I'm working in development in G.Harbor where 4 houses are currently being re-sided.
20 yrs old Tyvek or Barricade and cedar bevel over osb all dry rotted out!

Does Evergreen sell that ?

Bill

Timuhler

We don't use anything over the Zip, but on the roof 4-12 and under need felt.

Evergreen ordered it in for us, we are getting it through Arrow in Port Orchard on the house we just started and the rep told me that Kingston stocks it.

What caused the mold on those houses? Was the detailing done right? Was there ventilation in the houses?

One thing I really like about the Zip panels and the Advantech is that they don't absorb moisture. They are very dense. We sheathed a floor in Advantech today and I'm going to take some scraps tomorrow and put them in water and photograph them every week or once a month or so. I'm a big believer in the product.

The Zip tape is a special tape too, its not like anything I've used before. The rep told me it is the stickiest stuff on the market. I'd have to agree. We left some in the rain and assumed it wouldn't work and it was just fine.

Email me in a couple of weeks or next week and hopefully we'll have enough up that you can come by and take a look. We just started one in McCormick Woods

http://picasaweb.google.com/TimothyU...ot25Gleneagle#

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bconley

Tim,
I'm only involved with one of those houses, the cause seems to be a combination of improper detailing, maintenance (or lack of), and exposure.
I have used Advantech for floors but not the Zipsystem.
One of the thing we suspect is vapor movement from the sun heating up the just rained on walls and driving it through the wrb.
We removed the siding from the weather side and replaced osb (the framing wasn't effected) and re-sided with Hardie and Jumbo tex paper. I think building paper work better than Tyvek or the like especially after seeing failure after failure, the paper seems create an air space to let it breathe and dry out. If it were me I would add the paper for cheap insurance.
Thanks for the invite I would like to see your project.

Bill

loneframer

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Timuhler

Bill,

What I'd love to do, but it just isn't in the cards in this economy, is to use Zip for walls, tape the seams and nail battens to the walls while the wall is down. Then come back and side. I think we could get a lot of the rainscreen details done with the wall flat.

Below is the wall we finished up before calling it a day. We'll add the closed soffit framing and the soffits. I'll wait on the fascia because I can correct quite a bit of mistake in ciphering if I hang it after the rafters are in.

Do you know who originally built those houses? How old are they?

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PlaneWoodworker

Advantech has saved us on a couple jobs. I agree WHOLEHEARTEDLY. Don't second-guess yourslef

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PlaneWoodworker

yourself*

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BKFranks

How do you work with advantech when you have to use a lot of MST straps and A35 clips on the exterior? Just tape over all the penetrations?

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