vinyl Milgard window install

[BADSIX]

I just had the structural inspector out to day, everything look good other than he said I need to put flashing on top of my new Milgard vinyl windows. why would you need to do that, is it really code? I've searched the code book but haven't found anything yet.

Jay D.

 

[Tunajoe]

You talking retro fit or new construction?

 

[matt_i]

You don't *have to* but its a good idea. I bent an aluminum flashing from trim coil as a "drip cap" that goes up the wall around 5", under the housewrap. Then Grace Vycor peel & stick, 6" wide on top of the polyurethane-caulked flanges. Then another piece of Vycor that laps over the top-tails of the vertical pieces, and also goes over top of the aluminum flashing.

Housewrap was initially cut diagonally up @ 45deg on each corner, so the peel & stick comes out thru that slit. Out comes the tyvek tape to seal the bottom horizontal edge first, then the two 45 deg cuts.

 

[jbwilkins]

It's a 'belt and suspenders' approach for water intrusion......if the caulk you used behind the flanges (in new construction) is inaduquate or fails then you'd have a leak.....the flashing is more 'bullett proof' in that you can see if it's damaged before you apply you're final siding material.....Both are typically recommended/required by the manufacturers to guarantee a waterproof seal......

Most manufacturers refer to the AAMA guidelines....

http://www.mgmindustries.com/documents/Installation_manuals/aama-2400-02.pdf

 

[kbs2244]

You need to do it because he is the inspector who will be signing off, or not, on your project.
But he wants it, as said, because it keeps water out of your wall.

 

[Kaizen]

why would you not flash a window or door. I don't see anything special on these ones that say they are preflashed. i'd never install an exterior door or window without several layers of rubber and metal flashing

 

[Cyberbear]

I imagine it gets pretty damp along the Oregon coast and that extra protection is being done based upon prior experience where less has failed. The inspector just might be doing you a favor.

 

[BADSIX]

thanks guys ,I don't have a problem doing the flashing it just seems unnecessary as there is a 1 1/2 flange all around the widow.
Jay D.

 

[Kaizen]

thanks guys ,I don't have a problem doing the flashing it just seems unnecessary as there is a 1 1/2 flange all around the widow.
Jay D.

that's just a nailing flange. the top flashing you need to install is not flat. it has a little edge to it which prevents water from being sucked up to the siding covering the flange. cheap insurance against future mold issues. I also use rubber stuck over that whole flange