Replies

1. 
   Tyr | Nov 05, 2004 07:48pm | #1

   Don't think I have ever relied upon felt alone to flash any penetration. Not to say it won't last a good while, especially on a wall. Depends on the "area weather" a good deal as to what might be acceptable. Around Denver I always have a drip cap (aluminum) under the wrap and then overhang any exterior casing a minimum of 1/2". You sure the window manufacturer doesn't have a premoulded flashing to match the window?

   Failing that get a roll of aluminum about 12" wide and long enough to do at least 1/2 of the window circumference plus enough to cover the cuts you make next--they will be straight cuts but appear pie shaped when you curve the flashing over the window.

   Use a Magic Marker to run a straight line far enough back from one edge so that when arced or bent, it will protrude over the window trim. Use that 8' "break" you always carry on your truck (or a 2X4) and bend the aluminum. Cut the long side from the edge almost to the bend.

   Curve the bent and cut aluminum so the long leg goes under the 30# paper and the short leg goes out over the window and trim (assuming you are siding and trimming allow for both thicknesses AND the overhang. Don't staple or nail too close to the window. Cut the remaining aluminum into pie shaped pieces larger than the ones on the long leg attached to the the wall. Cut these so the small end does not come to point but is a flat for a couple of inches. Bend the small end to match by hand. Cover the edges of the pie shaped gaps with Silicone II. Apply the small pieces and attach. Pick up your check.

   Tyr

   Edited 11/5/2004 1:03 pm ET by Tyr

   Edited 11/5/2004 1:04 pm ET by Tyr

   
   

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   Edited 11/5/2004 1:06 pm ET by Tyr

2. 
   ed2 | Nov 05, 2004 09:12pm | #2

   get a roll of lead flashing    very malleable, cuts w utility knife blade   no sharp edges

1. 
   Piffin | Nov 07, 2004 06:15am | #9

   Lead is the righrt answer in my book 

    

   Welcome to the Taunton University of Knowledge FHB Campus at Breaktime. where ... Excellence is its own reward!

3. 
   Sasquatch | Nov 05, 2004 10:54pm | #3

   I have seen some plastic flashing used, but don't know if I would use it.  Ideally, if I were to design a round window into a home, I would protect it from above with sufficient overhang in addition to flashing.

   Les Barrett Quality Construction
4. 
   mdresimprov | Nov 05, 2004 11:59pm | #4

   This may help:

   http://www.minihttpserver.net/sl_tools/showid/choosing_flexible_flashings_ID_311.htm

   MES

5. 
   hammer1 | Nov 06, 2004 01:19am | #5

   You cut small pieces of pre-bent window flashing. Start at the bottom of the curve on both sides. Your pieces may only be 2" - 3" depending on the radius. A successive piece of flashing overlaps the first and so on until you hit the top, just like step flashing a dormer. You just have to figure the flashing pieces to fit the curve so each piece fits nicely over the other and overlaps about 1/2".

   Beat it to fit / Paint it to match

6. 
   bruceb | Nov 06, 2004 02:14am | #6

   Loach,

                   A long time ago in a galaxy far away, I used to have some copper working tools. One of those tools was a pair of pliers that would crimp the outer edge of a flashing. By relief cutting the back side and Crimping the front, you could make any radius you wanted. I would always flash the relief cuts with some water and Ice shield. never took to long and I never had one leak. Just be careful as aluminum tears easier and sometimes the coating flakes off when you crimp. We only ever used copper when we did it that way.

1. 
   MisterT | Nov 06, 2004 02:24am | #7

   A high quality urethane caulk will do it nicely. 

   Mr T

   I can't afford to be affordable anymore

1. 
   Snort | Nov 06, 2004 03:13am | #8

   or, a bitithane self-sticking window wrap...we use Window Wrap from mfm 1-800-882-7663 Don't worry, we can fix that later!