Tips on flashing out windows and doors?

J S Machine

I am to the point of a small shop build in my back yard where it is time to install the windows and doors. I have no idea how to do this correctly, and I want it to be right. I am trying to understand the flashing process for doors and windows. I gather that the point is to keep water from getting to the wood wall behind it.

I have googled and found several things, but I haven't found a definitive end-all solution on how to do it. My building is wood construction with OSB sheathing, covered with felt. I am going to use vinyl siding for the outer covering. I already bought two aluminum frame windows and a prehung steel entry door. I'm not exactly sure if the windows are "pre flashed" or just a regular type, I'll have to look, but everything is brand new.

I also have a roll up door on the very end and I'm not sure exactly how this needs to be addressed either.

Tom Struble

there is no ''end all'' solution your new windows and doors should have came with these details if not get them from the manufacturer

there is no such thing yet as a pre flashed window,not sure about the roll up door other to say flash the framing and sheathing before any trim is installed

J S Machine

I figured I would go with the "upside down martini cut in the wrap" method. I have aluminum windows.

I found this:

http://qcfocus.com/journal-article/w...g-instructions

It looks like it will work pretty well, and seems to be the norm.

I don't have the premade sill pieces I have seen in several examples so I am going to have to make my sills out of flashing. I'm sure this can be done but I'm not sure how to do it correctly. I notice most people do it with the tyvek flex wrap stuff, but all I have is regular adhesive backed flashing. I picked up a roll of 4" wide and a roll of 6" wide.

I also found this, which kind of contradicts the normal method a little but makes some sense..

http://www.albertsroofing.com/Window%20Flashing.htm

Tom Struble

use Franks technique and you will be safe,that actually may be the ''end all'' you seek