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Question DetailsAsked on 7/12/2015

Should flashing/drip edge be installed with gutter replacement or roof replacement

Current roof/gutter without drip edge or flashing. Gutters in need of replacement, roof not yet in need of replacement. One gutter contractor advocates installation of flashing. Another says it should only be done when replacing the roof so as not to damage the siding or the roof with attempted installation. Who is correct?

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I think JC may have mistyped when he said drip edge flashing is "almost universally installed correctly" - or else he sees a different breed of contractor than I have over the past decades. In my experience, is almost universally installed INCORRECTLY - on top of ice and water shield or membrane, between bottom row of shingles and starter row - and even upside down with the drip edge bulging up under the shingles.


Generally - unless it needs replacement NOW due to rusting through, which may be locally remedied by slipping another piece of flashing or dripedge up under it as far up the roof as it will go till it hits the nails holding the existing flashing, should ideally be replaced with the roofing, not the gutters.


It should be installed directly onto the roof sheathing (the plywood or OSB) - under any Ice and Water Shield layer, under the roof water barrier (tarpaper or synthetic membrane) which lies over the whole roof field, and under the shingles of course - it should be the bottom element of the roofing system at the eaves, so any water coming down the slope under the shingles or off the bottom edge of the bottom row of shingles or the starter row comes over the top of it, and is thereby directed past the bare edge of the sheathing and the fascia to drop to the ground, or with gutters to drop into the gutter.


The guy who said trying to do it when not replacing the roofing is generally right that you can tear the shingles up, especially if older ones so they crack easily. It is possible to very carefully reach in a nail cuttezr on wood shingles, or with diagonal cutters on asphalt shingles and remove the bottom row of staples or nails and use a drywall taping knife or putty knife to lift the ice and water shield and membrane to get the drip edge into correct position under them for nailing, then carefully lifting the shingles up to concealed renail them and the drip edge in place, but is easy to damage the lower rows of shingles doing this. Definitely to be avoided if possible.


With that said, for your case (no existing dripedge) there IS a retrofit installation type of flashing that can be used when putting on gutters if the roof is not near replacement age - has a very small lip that slides in under the bottom edge of the ice and water shield or membrane just part of an inch and is not fastened there at all, is nailed only to the fascia board - looks like this (though example is for playhouses) - see bottom photo


http://www.cottagekits.com/phouses/di...


It sticks up under the waterproof membrane/ice shield just a bit so it should not hit the nails in that area (though may need notching for a few nails right near the edge), nailed to the fascia to hold it in place, then directs water into the gutter as normal dripedge does - certainly a lot better than no dripedge at all. When you reroof, it can be replaced, or if not putting metal or vinyl facing on the fascia board at that time the roofer can just put regular drip edge like the following - though the image incorrectly shows it OVER the ice and water shield. Should be UNDER the field ice and water shield to catch any water coming off that, though sometimes on flush fascia/sheathing applications an ice and water shield strip is run along the eave and folder under the drip edge and extends down over the fascia as shown to protect the fascia if it does n ot have a vinyl or metal fascia cover - on overhanging sheathing the ice and water shield usually stops at the edge of the sheathing, OVER the drip edge.


http://www.roofingcontractorreview.co...


Answered 2 years ago by LCD

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Flashing is only replaced on new roof installation if installed correctly, and almost universally is installed correctly. Interesting that many roofing contractors install new flashing over old flashing to avoid having to take down the gutters and reinstall them.

Jim Casper Gutter cover and Gutter contactor Iowa & Nebr

ps for great ideas on gutter metal weights, valley overrun problems etc see my blogs

pps We are a BBB Integrity Award winner and a Angie's List Super Service Provider 2014

Source: www.heartlandmastershield.com

Answered 2 years ago by jccasper




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