16 votes

How far should shingles hang over the drip edge of the roof?

It may depend on the specific brand and version of the shingles used. Here is an advisory from GAF a major manufacturer: GAF Shingle Advisory In it they say: Shingles should not extend more than 3/4”...
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  • 20.3k
10 votes
Accepted

Can hail-damaged shingles be repaired, or should they be replaced?

The ceramic granules are the protective layer of the shingle. They're not merely aesthetic. They offer UV, impact, and corrosion protection, and the shingle is vulnerable when they're removed. The ...
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  • 104k
10 votes
Accepted

Why should I repair/replace roof just because it's old?

"Shingles torn" "Nails showing" You very probably have leaks you have not yet noticed. If you re-roof now, you might not rot out the roof deck and need to replace it as well. If you wait until you ...
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  • 132k
9 votes

Is fiberglass showing on roof shingles an indicator of immediate repair needed?

That's mostly cosmetic, especially since it's almost entirely on the top layer of a two-layer laminated shingle. It is unlikely to result in leaks. That said, they're probably going to continue to ...
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  • 104k
8 votes

Why are the shingles blowing off my year-old home?

It's good that the roof is not leaking (you didn't mention that) but improper installation will create leaks in the future. So, verifying a few key items and then officially notifying your builder (by ...
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  • 22.5k
7 votes

Why should I repair/replace roof just because it's old?

During the high season (when you'll need it urgently) it's harder to find and schedule a roofer to come out. Insurance won't cover all your losses : if it covers any losses. Much damage can be hidden ...
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  • 10.3k
6 votes

How effective to use zinc strip to prevent roof moss

Yes, it works - although most recommendations I've seen prefer zinc to copper (both more effective and cheaper). In fact, you see it all the time on older roofs underneath galvanized roof fixtures. ...
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  • 6,825
6 votes
Accepted

What's the true longevity of exposed fastener metal roofs?

I work for a metal roofing company, and this is a big area of concern for a lot of homeowners. Here's what I can say: based on experience and facts. 8-10 years ago, the fasteners on exposed metal ...
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6 votes
Accepted

Should this shingle have another shingle covering it?

There's always a last shingle as the caps overlap. If you have two different ones this way, there were two "last shingles" (not a huge deal.) If you put another shingle on top, you'd have to ...
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  • 132k
5 votes

What is this architectural shingle condition called? Is it reparable?

It’s called “self sealing” shingles (or lack thereof). Shingles are made to self seal to each other by having the sun heat them up (including the asphalt strip on the underside) and the weight of ...
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  • 22.5k
4 votes

Adding an eaves drip edge to an existing roof installation

It is possible that your ice & water shield will peel up cleanly depending on age, climate, current temperature, sun exposure, etc. Try that first, otherwise... Installing drip edge under the two ...
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  • 104k
4 votes

What is this architectural shingle condition called? Is it reparable?

It doesn't come fully attached. The black line at the bottom is an asphalt strip that is sticky when hot, the sun heats it and it sticks the pieces together. This is a bit of a special case because ...
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  • 5,551
4 votes

Why is roof underlayment nailed in?

Staples are far more prone to cause leaks than roofing nails. For a pro roofer with a coil nail gun, they save no time at all .vs. using nails. For a non-pro who can actually use a hammer, they save ...
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  • 132k
3 votes

Can hail-damaged shingles be repaired, or should they be replaced?

Yes it will leak. There's tar paper or tyvek or something under the shingles that will help provide a temporary defence against leaks, but you need to repair or replace those shingles. This is more ...
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  • 6,064
3 votes

Why should I repair/replace roof just because it's old?

Because the rot from leakage will damage the sheeting and anything else it gets to. When the roof comes off, the foolishness is exposed. Insurance does not cover neglect. Our neighbors tried this ...
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3 votes
Accepted

Did I install this roof vent correctly?

Yes this looks correct. You're right about cutting away too much shingle, but it looks like you fixed it with sealant.
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  • 4,641
3 votes

How do I protect my new roof while working on siding?

Yes. You would want to protect the shingles if there is to be a lot of foot traffic on the roof. A good way to provide that protection is to get a couple sheets of 1/2" plywood which you lay over the ...
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  • 61.1k
3 votes

Slate roof removal for a shingle roof

Not from what I've seen. From the dozen of so slate roofs I've seen and had, they were all applied directly to flat tight seamed planking. Typically, only wood or other types of roofing that aren't ...
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  • 9,779
3 votes
Accepted

How to know when an asphalt shingle roof needs to be replaced?

Yes. Short of actual leaks (which are better avoided by replacing before you notice them) aging in asphalt shingles (if you don't know when they were installed) is assessed by observing loss of the ...
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  • 132k
3 votes

Should I replace a single powered roof vent with ridge vent according to my roofer's advice?

In my personal experience, a "real vent" on top of the roof (cupola, turbine, etc) is far more effective than continuous ridge vent, and I will in fact be retrofitting a cupola onto a roof ...
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  • 132k
3 votes
Accepted

How to install k-style gutter guards

These gutter guards do go under the bottom layer of shingles. There should be no nails as low as you seem to be indicating with the plastic guard installation attempt. It's possible that you've ...
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  • 29.1k
3 votes

Roof Leak without any Visible Shingle Damage or Issue

Always look upslope of the leak below. Water can run along roof framing for great distances, so the leak could be anywhere higher up the roof, rather than directly above the wet ceiling below.
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  • 132k
2 votes

What are the pros and cons of Owens Corning shingles vs. GAF shingles?

I own a roofing company and have used both products. Our go to shingle is the GAF timberline, but from time to time we will upgrade someone to the OC duration. One of the benefits we found with the ...
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2 votes

How can I build a shed in two halves and join them without the roof leaking?

If the two halves of the shed are built to be structurally sound while separate, then there is no reason that each roof can't be built slightly asymmetrically so that one overlaps a portion of the ...
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  • 12.1k
2 votes
Accepted

What (animal?) made a 0.75" diameter hole through my asphalt shingles?

I call them manufacture burn holes, I see them in most roofs even roofs only 1 year old, it is normally where there are either loose stone or poor seal of the stones on the shingle and with out the ...
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  • 36
2 votes
Accepted

new roof + new skylight windows

Almost all sky lights on a roof are mounted a 2x3 or 2x4 curbing that is nailed down to the roof sheathing. Flashing metal pieces are the bent up and nailed to the outside of the curbing and put down ...
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  • 61.1k
2 votes

Should this roof be fixed now (shingles)?

Get the curling ones fixed. As you're getting quotes for that, ask for a quote for an entire re-roof and decide for yourself. (If it was me and I had the money, I'd re-roof entirely to save the bother ...
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2 votes

Leaking roof valley strategy

Yeah, that roof's pretty beat. I'd actually go heavily at that seam with Mortar Caulk (its gritty & gray), the whole length of the seam if you don't know where the leak is. But, spraying a hose at ...
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  • 9,779
2 votes

Can hail-damaged shingles be repaired, or should they be replaced?

You should claim it and have it fixed professionally. This type of damage could result in leaks, you should have them replaced, and don't try to jerry-rig a fix yourself. Depending on your insurance ...
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2 votes

What's the true longevity of exposed fastener metal roofs?

It depends on the quality of installation, but on average exposed fastener metal roofs (which do, indeed, use EDPM washers if not of very low quality and life-expectancy) are a 15-25 year roof, while ...
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  • 132k

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