Advice needed on extending roof deck to reach gutter


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Old 03-02-05, 08:21 AM
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Advice needed on extending roof deck to reach gutter

I'm replacing an existing ashphalt shingle roof with metal panels that will be installed over the existing single layer of shingles. Right now the shingles extend over the end of the roof deck and over the gutter. The metal panels will be flush with the end of the roof deck and will not extend over the gutter. What's the best way to get the runoff to reach the gutter with the new roof? Can I install a piece of flashing to extend from the roof deck to the back of the gutter? Thanks for any ideas. Wally
 
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Old 03-02-05, 01:26 PM
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The metal roofing should extend about an inch over the gutters too.
 
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Old 03-02-05, 02:57 PM
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Yes, you install EXTRA-WIDE flashings. Since you'll have the opportunity to install any old size you want, why not go to a Roofing Materials Wholesaler, and get an edge flashing which lays a foot or more on the deck, prior to panel installation?
 
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Old 03-02-05, 07:22 PM
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Wally,
What type of metal panels? standing seam ? corrigated?
Why will they not hang over????

A few things about metal:

1. There needs to be a "buffer' layer of underlayment, or insulation, or wood battens, something... between the shingles and metal, (or remove the shingles).
The natural expansion and contraction of the panels will scuff against the granular surface of the shingles sanding off the metals protective coating causing premature rusting and deterioration from the underside, just from the humidity in the air. It will start to look like your roof has cancer in a few years.

2. The panels should overhang the eave. Water DOES travel uphill in the right conditions, especially metal on metal as it has a better chance of capillary action occuring. If there is nothing you can do about the length of panel, think about dropping them the extra inch and have a wider ridge cap at the top to make up the difference.



Good Luck!
 
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Old 03-02-05, 07:42 PM
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More info

Thanks for the info. The panels are made by Dura-loc and will be attached to 2x2 battens. The first batten will run flush with the end of the roof deck. The shingles on the roof now extend over the end of the roof deck to the gutter, but the metal panel doesn't extend the roof deck. I'm hoping I can use flashing to extend the deck a couple of inches to reach the gutter if this will look ok and hold up ok.
 
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Old 03-02-05, 07:56 PM
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Unless there is an echo in here... "The panels should overhang the eave!" Everyone seems to be in agreement on this. You need a mechanical drip edge, which can only be achieved if you let the metal hang over the edge.
 
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Old 03-03-05, 04:46 AM
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Dura loc makes an eave closure or starter strip for use in that application.
Check out their web site


Good Luck!
 
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Old 03-03-05, 04:49 AM
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An EXTRA -WIDE, that is EXTRA-WIDE steel edge flashing into the gutter will direct everything into the gutter. EXTRA-WIDE flashings are generally not available at big box stores. They have to be purchased from a Roofing Materials Wholesaler, or made up.
This is assumming there's some unkown reason why the panel cannot simply run into the gutter. Even then it needs a flashing, and wider is better even in that case.
 
 

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