Replies

1. 
   ckorto | Nov 25, 2009 11:58am | #1

   That's what to use as long as there's nothing pressure treated around the skylight.  Didn't the skylight come with a flashing kit or is it a repair?

   Chuck

1. 
   jonblakemore | Nov 26, 2009 04:00am | #3

   No PT.We have 5 skylights to do, so I'm thinking it's worth it to break out the brake (ha!) to fabricate our own flashing. 

   Jon Blakemore RappahannockINC.com Fredericksburg, VA

1. 
   Matt | Nov 26, 2009 01:46pm | #9

   Assuming whatever skylights your are getting have available flashing kits I'd check the warranty of the MFG with respect to this.  Water leaks are one callback no one whats.

2. 
   bradmd | Nov 26, 2009 06:10am | #6

   What is the issue with PT and the AL coil?  What would you use in againts PT otherwise?

1. 
   ckorto | Nov 26, 2009 11:25am | #7

   It says right on the box of aluminum, "do not use with pressure treated wood".  The pressure treated lumber will eat away at the aluminum.  Use copper if you're going to flash against pressure treated lumber or have some sort of seperation piece such as ice and water membrane in between the two.

   Chuck

2. 
   Matt | Nov 26, 2009 01:42pm | #8

   ditto what ck said.  Al + PT = very bad.   This article explains it more fully.   Now adays most code officials are aware of it too, and our NC flavor of the IRC building code even prohibits it.  Not sure if that is part of the base IRC code or if it is a NC addition.  BTW - Some codes prohibit the use of Al flashing in contact with cementous materials too  - ie concrete.  Al flashing in other than roofing applications is just so 90s.. ;-)

   Personally I prefer to use one of the vinyl or rubber flashings that are now available.   They even have the cheap stuff at Lowes although that is not the best IMO since it is kinda like mylar plastic (if you happen to know what that is) and isn't so good at sealing around the penetration of fasteners (which BTW Al wasn't too good at either).  The flashings that have more of a rubber component are better at this.

2. 
   Piffin | Nov 25, 2009 03:22pm | #2

   Not if you know how to form the corners tight and the pitch is steep enough. Shingles roof?

    

    

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

1. 
   jonblakemore | Nov 26, 2009 04:02am | #4

   Archy shingles on a ~5/12 pitch.I'm planning on following Jim Blodgett's advice from his FHB article from the early part of this decade. Any tips? 

   Jon Blakemore RappahannockINC.com Fredericksburg, VA

1. 
   Piffin | Nov 26, 2009 04:13pm | #10

   I'd have to see that article to comment on it. 

    

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

1. 
   jonblakemore | Nov 26, 2009 07:27pm | #11

   Here's the article:JB article on curbed skylight 

   Jon Blakemore RappahannockINC.com Fredericksburg, VA

1. 
   Hazlett | Nov 27, 2009 02:45pm | #12

   Jon, If it's a velux skylight- just buy the Velux flashing kits. It costs me maybe $35 or so per velux flashing kit-and the installation is virtually idiot proof. It can't possibly be worth trying to save $35-STILL have to buy the aluminum-which will be thinner than the Velux kit-set up a brake- time spent measuring,cutting bending--------- to me- no way is it worth cobbling my own flashing package together if a Velux kit is available.
   stephen

3. 
   JeffinPA | Nov 26, 2009 05:04am | #5

   Not  for not, but I have only used Velux skylights and i buy the flashing kits and install per Velux instructions. 

   I am batting 1000 and plan on keeping my batting record with no call backs. 

   I have fixed some other skylights that were absolute nightmares and would rather never get a call on a leaking cheap skylight fix again.  I'll take the call but would rather do other stuff!!

4. 
   robert | Nov 28, 2009 07:58pm | #13

   I'm with Jeff and Stephen on this.

   It's been more than 20 years since I put a roof on for actually profit.................but I do remember it sucking big time to try to flash a skylight with coil stock.

   I'm sure that whatever skylight your using, the company sells a flashing kit.

   And it will be worth every dime.

   Never want to fix another skylight leak as long as I live.