Rotting OSB under windows

Not Stucco](


]( Forum Index]( -> Windows]( previous topic]( :: **View next topic]( Sat Jun 17, 2006 11:35 pm Post subject: Not Stucco


Is this bad?

Not if your a termite.

OSb ala carte

What type of siding was installed?

What type of flashing and seal was present?


Is this all there was under the siding?

Joseph, I ask those same questions.

I wouldn’t blame the osb, although it does soak water up like a sponge. But whether it be osb, plywood or insulation board, if the water is getting to it, that’s the real problem. Looks like that siding that was made up of osb material is what soaked some of it up and then a problem around the window. Probably just started as a bad caulk joint between the wood window trim and vinyl window trim. And where is some tyvek or felt something to protect the osb at least around the window?

Please post a larger image.

Joe, Can they get any bigger?

As a veteran Contractor/Home Builder, I have used shear rated OSB for years. We do, however, use a house wrap such as Tyvek over the OSB and around all of the rough window openings. We also apply a bitumen type flashing around all of the window openings and caulk before installing any window to an opening.

I have replaced countless windows for customers. Upon removing the existing window(s) we inspect the rough opening thoroughly for just such damage. On a great many there is usually no damage on the ones that are treated correctly before installation and you rarely find this type of damage.

We NEVER install a window directly over OSB, regular plywood or any other type of shear.

This type of installation shows signs of DIY or handyman work. What many of these type of installations fail to do is read the directions from the window manufacturer for correct installation.

Just my 2 cents.

They have put together thousands of them just this way in the kansas city metro in the last 15 years. And still are.

Were those by termites or carpenter ants??

I wonder if they got hurt burn from the manufactured glues.!

Marcel :slight_smile: :slight_smile:

They were busy makeing weep holes! lol

The problem is water. Not Insects.

I’m still having a hard time trying to see the rot.

As stated already, please post a billboard size pic!

I have seen many ocurrences with wet OSB in my lifetime, and not a great fan of the product to begin with, but I have never seen rot to create manufactured and engineered holes in the softned wood fibers unless some bug or insect finds a home in the humid arena of moisture and food all in the same place. Good munching.

Marcel :slight_smile: :slight_smile:

OSB is junk /trash/crap. After it has become wet! IMO

Marcel & Carl
It is definitely a measure of a man’s genius when it relates to how much he agrees with your point of view.

Carl; That was very good information. Thanks.

Larry; not quite sure how to take your info.! Sounds like a poem from an unknown Poet. “quotable quotes” from readers digest??:o :wink:

Marcel :slight_smile: :slight_smile:

hahaha hilarious…