Replies

1. 
   Mike_Smith | Nov 20, 2000 11:14pm | #1

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   ""W""...... and that's not a political statement..

1. 
   Mr._Pita | Nov 20, 2000 11:47pm | #2

   *Yeah, sure, Mike. C'mon outta hiding, you dubya lover, you!

1. 
   Jeff_J._Buck | Nov 20, 2000 11:53pm | #3

   *Go with the "W". I haven't seen this pre-bent. Around here you have to break-bend them, maybe I haven't looked around enough. Do the prebends have a fold bent along the edges so you can attach with clip tabs....so you avoid nailing directly thru the flashing......and instead nail the clip tabs so it can expand w/o buckling? Jeff

1. 
   Stephen_Hazlett | Nov 22, 2000 02:20pm | #4

   *I would certainly go with the W valley since it has always been my preferred valley.The 18 inch wide stuff sounds a little skimpy to me cause I like a 24 inch wide coil.I would suggest you have it bent on site rather than fudging in pre bent stuff.the pre bent stuff is kind of a one size fits all thing. If the 2 outside center bends aren't bent to the right angle it can be tricky to get the flashing to sit properly in the valley.If the bend is too steep and the flashing is secured only along the edges the center of the flashing wants to lift up off the deck. Even if the center doesn't lift,the 2 side flanges will tend to Arc instead off laying flat.Bending it on site will let you finess the installation a lot better---particularly if the 2 roof slopes intersecting have different pitches requireing different outside center bend angles.Regaurding the expansion connections along the outside edge.The material I commonly use is Painted aluminum.I bend it on site.It is frequently installed in direct sun and pretty well expanded.I nail every foot or so along the outer edge,and buckling is rarely a problem.I have been toying with the idea for about a year of punching a small slot where each nail goes along the outside edge with a siding tool or a crimper I use on gutter end caps.I haven't actually done it yet,but maybe this winter I will have the gumption to test it out.I have never seen anyone do this but it has me thinking.good luck All,Stephen

1. 
   Bob_Williams | Nov 29, 2000 04:28am | #5

   *First I'd like to apoligize for not thanking you earlier for your help. I am new to this computer and couldn't find the message I posted until today. Sooooo thanks. I did indeed find prebent flashing that includes the 'W' center and the bent edges to allow the use or clips. That does pose an additional concern about the bent edge which sticks above the flat bottom section. I can see the advantage in keeping water inside the flashing but this will also raise the shingle above the flashing 3/8"-1/2". Not wishing to nail through the flashing I appears I'll need to bend the edge over close to flush with the roof deck. Unless you have a better solution.

2. 
   Bob_Williams | Nov 29, 2000 04:28am | #6

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   I am installing a new roof of 6/12 pitch to a higher 10/12 pitch and am planning to use copper valley flashing but undecided as whether to go with a 36" wide smooth flashing or prebent 'W'center, 18" wide. My concern here is to keep the valley free from all the tree debris but wish to prevent the water moving under the shingles on the lower roof. Both are available locally and in stock. Any suggestions?