For questions regarding the roof of a home or other structure in general, including roofing types, installation, maintenance and repair, upgrades, venting, and potential problems.

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5
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2answers
2k views

How do I repair/reattach downspout and gutter after snow/ice damage?

We've had a heavy dose of snow here in the Boston area it has taken a toll on our gutters and downspouts. The downspout at the rear of my house filled with ice and pulled away from the elbow that ...
5
votes
1answer
250 views

How can I repair a Palruf roof?

I've installed a couple of transparent Palruf PVC sheets for a treehouse roof. I've gotten some small (several inch) holes in it that I'd like to patch up. I have some small pieces of Palruf left over ...
4
votes
6answers
4k views

Would putting a sprinkler on my roof help cool my home?

Anyone ever put a sprinkler on your roof to help out your A/C on unusually hot days? Just wondering if it helps.
4
votes
6answers
6k views

Is a roof made out of glass viable?

I have thought about that if I am ever going to build a single floor house this is what I would do. I would make the whole roof out of glass (like a greenhouse). This glass roof would be made out of ...
4
votes
2answers
941 views

Can you use plywood as roofing?

I've seen buildings where plywood was used as both wall sheathing and siding. T-111 is commonly used this way, for example. Would it work to do the same thing on a roof? I assume it wouldn't last ...
4
votes
5answers
200 views

removing snow from roof

How do I remove snow from my roof? How about 4" of snow covered with 1/2" of ice? How do I know when I should risk getting out there to try to remove it? We just received a notice from The New York ...
4
votes
2answers
1k views

Do I run screws through the “tops” or through the “bottoms” of the corrugated steel in roofing?

Suppose I want to cover a roof with corrugated steel sheets. Imagine a sheet laying on the roof. It will have "tops" - zones that are further from the roof surface and "bottoms" - zones that are ...
4
votes
3answers
326 views

How to introduce more run into roof?

I have a 16'x20' deck roof that is attached to my garage on one side and (3) 4"x4" posts on the other side. The rise over the 16 feet is about 2 inches which is not enough for the water to get off ...
4
votes
3answers
12k views

How do I find the source of the water leaking through the ceiling?

I live in Minnesota in a single story rambler with full basement. In an upstairs corner bedroom I started noticing some water leaking in the closet ceiling a week or two ago (picture is current, it ...
4
votes
2answers
383 views

Should a vent cap be installed under all the layers of shingles, or just the top most layer?

When installing a roof cap on a roof where there are three layers of shingles, do i trim away just the first layer of shingles or should i trim away all three layers to slide the cap underneath.
4
votes
1answer
2k views

How do I seal a leaky roof and repair the minor ceiling damage it caused?

We recently had some very heavy rains and during the worst of it we had some leaks. When I noticed the problem, I went into my attic and found out that the leak was coming from around a vent in the ...
4
votes
2answers
2k views

How do you install zinc strips in a roof without creating leaks?

This article gives instructions for installing zinc strips at the ridgeline to inhibit moss. This picture shows nails through the zinc strip: It looks like they have nailed through the zinc in to ...
4
votes
2answers
584 views

What are some good downspout options for a brick house?

I need to replace the gutters and downspouts on my house, and I'd like to know the best approach. The house is 100 year-old clay brick house. The old gutters were aluminum and used downspouts that ...
3
votes
4answers
507 views

My house is nearing 20 years, what will break soon?

Okay, I recently learned that most appliances/things start breaking once the house reaches around 20 years. I'm running 19 now. From what I have heard, roof (although mine is apparently a 30 year ...
3
votes
3answers
542 views

Small amounts of moss on asphalt shingles?

What's the best way to remove moss from asphalt shingles?
3
votes
3answers
12k views

How to remove moss from my roof?

My roof seems to be growing moss and I'd like to remove it. I did some research and it looks like the solution is to mix water and bleach, spray the mix on the moss and then scrub the moss off about ...
3
votes
3answers
5k views

How do I lay asphalt shingles on a roof, and what should be under them?

How do I lay asphalt shingles on a roof, and what should be under them? Are they self-adhesive? Can I stick them directly onto plywood?
3
votes
2answers
2k views

What is the max distance between top of gutter and the roof tiles?

I am about to replace my gutters, one guide I have read say the gutter should never be more then 30mm below the bottom of the roof tiles, another says 50mm. What is the reason for this? What is a ...
3
votes
2answers
554 views

How to repair cracks in concrete overhang over entrance

I have a slab of concrete over the front entrance of my house with some serious cracks in it. I don't actually know what the proper name for it is, which makes this difficult to Google - so I've ...
3
votes
3answers
3k views

Is installing a gable fan worth the investment?

We have 2 gable vents in our roof (approx 2' high or so), one at either end, and upon inspection it does not appear that there is really enough overhang in the roof for soffits. I still have to ...
3
votes
3answers
5k views

What's a good way to seal a flat concrete roof?

My guess is that a long time ago there was a fire in part of our house and what was the top storey was capped and the floor replaced with thick slabs of concrete. This was then sealed over with ...
3
votes
2answers
625 views

Which flat roofing system requires the least maintenance?

I am a board member of my townhouse homeowners association and our townhomes are unfortunately very tall (need a lift or 60 ft ladder to access the roofs) and also the builder made the roof one single ...
3
votes
1answer
309 views

Service mast too short

I've read that the service mast on the roof should be 12-18 inches high. The one we have is a lot shorter than that. Does that pose any safety issues? We recently purchased the house, and the previous ...
3
votes
3answers
809 views

Does a device exist that can help find the source of a leak in a flat roof?

My Dad has a flat roof over his garage. It's covered with tar and felt. We had an unusually hard and cold winter last year (Republic of Ireland) and since then the roof has developed a leak. We've ...
3
votes
2answers
2k views

How do I fix a leaking skylight?

I have a skylight on a shingles roof. I don't know much about the skylight as it was installed by a previous owner, but every year, at the beginning of the rainy season, the skylight leaks. And every ...
3
votes
1answer
8k views

Is it better to vent a bathroom fan out the soffit, the side of the house, or the roof?

Working on a friend's house, we're installing a bathroom fan. He had planned to vent the fan out the closest soffit, which is only a few feet away. I'm trying to persuade him to vent it out the roof ...
3
votes
2answers
3k views

What is the method to seal a concrete roof?

We are staying in a home which has a concrete roof. Now we are facing leakage in the roof during rainy seasons. What do we have to do? How do we protect the roof from leaks?
3
votes
2answers
187 views

What limits the number of skylights you can put in a room?

I am thinking of putting skylights in my kitchen between the trusses in the attic. Let's say my kitchen is below 5 trusses, giving me 4 spaces where I can put a skylight. Is there any structural ...
3
votes
2answers
678 views

Should I pre-built rafter units, or build them in-place?

I'm planning a small roof - 12' x 16', gable style. Almost all the rafters will identical. Should I build rafter units ahead of time? 2 rafters + a ceiling joist + plywood gussets. I'd make a simple ...
3
votes
1answer
3k views

How do I nail plywood to flat roof framing?

I am putting some 3/4 plywood on top of 2x6 framing joists on my flat garage roof. The framing is spaced 16oc. I figured that I place 4x8 plywood sheets in such way that their short edge will be ...
3
votes
3answers
224 views

Roof stone tiles. How to fasten them?

I am watching a TV program where they are restoring a ruin into a cottage. One thing that left me aghast is the fact that the roof was made with flat, very heavy stone tiles. Ater they rebuild the ...
3
votes
1answer
178 views

Are alternative roofing types, such as rubber roll, usable for a typical residential sloped roof?

I'm wondering specifically, if rubber-roll roofing, such as this can be used on a sloped roof. Or maybe if there is something akin to the stretch-and-seal tape but in large sheets that would be ...
3
votes
2answers
5k views

What should I do about water dripping into my smoke detector from the attic after a heavy rain?

I live in the Midwest of the United States, and we not-too-rarely get a large amount of rain coming down at one time both in the spring and sometimes in the fall. Last night was no different (aside ...
3
votes
2answers
154 views

Should I paint wood in a roof that is not directly exposed to the outside?

I'm currently in the process of replacing the roof of a room. This room was originally a balcony, so has never been part of the main house. The roof that was removed had wood beams with wood ...
3
votes
1answer
374 views

How much sag on a roof is acceptable?

I have minor sagging of my roof plywood, 3/8" thick, placed on trusses 24" apart. Is there an amount of sag that is technically okay? I could not find anything on the APA website. I am not worried ...
3
votes
1answer
149 views

Should I have my old ceiling vacuumed before installing insulation?

My house (built about 1890) has no insulation in the roof and so I plan to put in insulating batts. There is a lot of old dust and a few possum droppings up there, and I have heard that the dust can ...
3
votes
1answer
276 views

What do I need to do to finish a roof with exposed rafters on a shed

I have a shed as pictured that had never been finished completely. As such the shed has a lot of dust debris, etc getting in that should not be. What do I need to do to finish the shed. Should I be ...
3
votes
3answers
169 views

Can you cap a chimney to reduce moisture and still use the chimney with a gas fire?

Or does capping a chimney always remove the ability to use a fire ?
3
votes
1answer
352 views

Roof Showing Some Dipping

I recently walked my roof. There are some low spots, like little depressions. What causes this and should I be concerned? It seems that the plywood underneath is good but it seems like the ...
3
votes
1answer
299 views

Should I seal these areas in my roof?

Our home has some areas where the different pieces of roof meet the primary roof. These may or may not meet the criteria for "dormers." I recently had a local worker do some caulking & painting. I ...
3
votes
1answer
1k views

How can I install soffit vents from the outside?

When we moved into the house we live in there was literally no insulation in the attic. We have a 4 1/2 pitch roof. We live in Texas and our first electric bill in a 1450sf house was almost $500. ...
3
votes
1answer
459 views

How do I properly install underlayment and a modified bitumen roof on a flat garage roof with concrete walls?

My project is to replace 18'x10' flat roof on my concrete garage. So far I installed 16" oc framing and 3/4" plywood over it. Now I am planning to install some fiberglass based underlayment (#30, ...
3
votes
1answer
1k views

Best way to flash an EPDM rubber roof on a concrete roof deck?

I'm planning to install an EPDM rubber roof on my 1922-built, poured concrete garage. The concrete deck leaks heavily during rainstorms, and it looks like installing an EPDM roof is just within my ...
3
votes
1answer
34 views

Which kind of roof coating to use to treat low pitch mod bit roof?

My city row house is 100+ years old and has a low pitch modified bitumen roof. It looks like a one piece asphalt or tar sheet covering of the roof. I bought the house 7 years ago and never had it ...
3
votes
1answer
121 views

Is sheathing required under a hybrid concrete tile roof?

We have hybrid concrete tile roof that has concrete tiles attached to a dense foam backing. The roofing was installed about 15 yrs ago. In looking in the attic, I noticed there is not plywood or ...
2
votes
6answers
14k views

How do I approach new water stains on my ceiling?

I am a brand new home owner with almost no experience with DIY stuff. There was a few days of significant rain and now my wife noticed some stains on our 2nd floor ceiling that we are pretty sure ...
2
votes
4answers
2k views

Can a completely flat roof be waterproof?

I would like to build a 6 x 8 ft playhouse with a deck covering the top. Is there a kind of roofing material that can (1) withstand a floating deck, (2) is DIY friendly (no blowtorches, hot asphalt, ...
2
votes
2answers
831 views

Why am I getting a lot of condensation in new shed?

I just got a new shed built with concrete blocks and a metal roof last month and thing is dripping with condensation from the roof. There is absolutely no insulation in the shed. How would I get rid ...
2
votes
1answer
110 views

How do I install roofing material on a roof with a ridge vent?

I am helping a friend repair his roof; his roof has a roof vent at the peak of the roof. I've done a few roofs, but never with a roof vent. So any help in how you roof with a roof vent? I assume ...
2
votes
1answer
118 views

Can I tear down a roof with a torch? [closed]

Can my friends and I use a torch gas cutter to cut into the roof, and dismantle everything by sections? I imagine there will be some concrete layering underneath and such.