On Thu, 9 Aug 2018 08:55:45 -0700 (PDT), Davej
wrote:

On Monday, August 6, 2018 at 11:01:48 AM UTC-5, Oren wrote:
On Sun, 5 Aug 2018 14:25:21 -0700 (PDT), Davej wrote:

In a 20 year old house how common is it to find windows
were not properly flashed? The Tyvek is simply cut out
around the windows. It isn't even taped to the window
frames.

What you have is an installer problem. Some clowns install windows by
piece work. $15 per window will get you three fasteners an not much
else, as to quality of the install.



I don't think it is practical for me to remove and reinstall each
window, so my plan is to remove the vinyl siding and tape the
vinyl window frame to the Tyvek. If there is noticeable deterioration
of the OSB board I will also cut an exterior inspection hole below
each window.

If you do remove (cut back) siding, I'd suggest self adhesive butyl
rubber. Comes in six inch or larger width. It does need to be
"tucked" under the siding (post install repair). Think about how
water runs down the walls. Do the sides first, bottom over that and
the top is last piece so as to shed water so it runs down the wall.

If you see no interior water damage, there may not need to be an
"inspection hole".

I'd use butyl rubber over tape solutions. Just me. Keep the weather
elements out and reduce drafts. You could pull the window trim and
pack insulation around the RO.