Questions tagged [roof]

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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123
votes
10answers
58k views

How to prevent heavy rainwater from jumping the gutter?

During heavy rain, the water collects from my second floor roof and runs onto the first floor roof as it should. The problem is that since all this water is now concentrated from the second floor ...
16
votes
2answers
123k views

What are the pros and cons of installing a roof heating cable?

Had some roof work done last year after mother nature abused my house by way of an errant tree branch. I had always suspected my roof had poor ventilation, most notably when I wound up with a 200 lb ...
5
votes
14answers
43k 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.
9
votes
3answers
33k views

Why is water leaking near my bathroom's exhaust fan?

This weekend when the snow started melting on my roof, I noticed a small water spot developing around all three bathroom exhaust fans in my house. I'm guessing the water leaked in around the exhaust ...
6
votes
1answer
17k 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 ...
5
votes
2answers
12k views

Can a gambrel roof have outer instead of inner supports?

I have built some of the "arches" for a gambrel roof, I know support is needed so the roof doesn't collapse. Is it reasonable to run twin metal straps around the roofing diagonally on the outside for ...
3
votes
2answers
2k 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 ...
20
votes
3answers
8k views

What is the safe/correct way to work on gutters? From a ladder or from the roof?

I am very comfortable working on the gutters (usually just cleaning them) from one story up by just sitting on the roof. I do this on my own home over the garage and at my parents one-story home. I ...
10
votes
5answers
8k views

Is it possible to collect rain water from a roof for drinking use?

For a re-roofing or new build, I was pondering the possibility of capturing and purifying water for drinking use. Are there good examples of this? What roofing materials should be used or avoided? ...
11
votes
1answer
5k views

Can I raise a sagging shed roof by winching the walls back into place?

TL;DR Can I fix the sag by slowly jacking up the ridge, simultaneously tightening some steel cables attached to the top of each wall? Measuring between the top of the wall and the top of the ridge, ...
7
votes
2answers
5k views

Do I need to add roof vents if I close off a small attic space in the garage?

I have a small section of roof over the front of my garage, which I would like to insulate and drywall (making my garage fully insulated). It is 39" high, and 54" by 17', framed with 2x4 trusses, ...
7
votes
3answers
6k views

Bathroom vent terminates to attic not outside.

Bathroom vents terminates to attic. The Inspector recommended that it terminates to the outside. What is the best way to do this. Should I just place the bathroom vent next to the roof vent opening.
3
votes
3answers
870 views

Small amounts of moss on asphalt shingles?

What's the best way to remove moss from asphalt shingles?
6
votes
2answers
13k views

How is installing roof sheathing horizontally stronger than vertically?

Prompted by a comment in this answer: What is better for a roof, plywood or OSB? Why is it stronger to install roof sheathing horizontally? Yes, it ties in more rafters, but in what manner is that ...
17
votes
10answers
44k views

What is better for a roof, plywood or OSB?

While watching the builders next door do their thing, I became curious with their technique to install plywood on edges neighboring the next townhouse, and OSB for the rest (which for these narrow ...
12
votes
8answers
11k views

Should plywood be missing on my roof?

I live in Canada and I just had my roof done on my house. I recently went in my attic and found out that some part of the roof is missing plywood :( In the following picture, there is no nails ...
8
votes
2answers
583 views

How do you locate roof leaks?

Sometimes the source of a roof leaks is difficult to find. The best approach that I've found for locating the leak is to have someone watch where the water is coming into the house (may be easiest ...
4
votes
2answers
10k 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 ...
3
votes
4answers
152 views

How do I prevent ice dams from forming on the eaves of an addition?

I added an addition several years age and now have eaves that form ice dams I understand that ventilating the attic may help but that is not an option. I have tried heated wires on the lower edge of ...
3
votes
2answers
2k views

How should I waterproof a concrete roof?

We have a 28y/o Medical Clinic in a remote area of Haiti. The roof is concrete and has one coat of DryLoc on it which is lifting off in many areas. The roof is 136' X 35' with a very slight pitch to ...
3
votes
3answers
228 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
91 views

What should I do about this roof leak?

We've recently noticed what looks like leaks in our roof. In one room: And in another room: We have a cathedral ceiling, very little roof space, and a tin roof. We're in Melbourne, Australia, which ...
3
votes
1answer
2k views

Is a roof sprinker a good idea?

I live in an area where temperatures often reach 95°F (35°C). I have attic fans and soffet vents and radiant barrier. Is it worth adding a roof sprinkler? I have read about it working wonders ...
3
votes
2answers
8k views

Insulating a post and beam construction roof/cathedral ceiling

My house (built 1972) has a cathedral ceiling with post-and-beam construction in the main room. The ceiling temperature can get as high as 90F, or even greater on a very hot sunny summer day, as ...
2
votes
2answers
3k views

How to taper a flat roof for a slight fall

I'm building a flat roof (3.6m x 3m) and I've purchased some treated timber firring strips which go from 100mm to 0 along the length. These will be placed directly on the joists. I will then add ply, ...
2
votes
2answers
3k views

Covering / Cap over DWV vent pipe

I've eliminated a DWV vent pipe during a bathroom remodel (consolidated fixtures and went from 2 vents to 1) but I don't want to mess with roof patching/repairing if I were to undo the penetration of ...
1
vote
2answers
1k views

Will I be able to run a duct over the wall to a soffit vent for a bathroom fan?

I have a small bathroom with exterior walls in an area of my home with a vaulted ceiling (and thus no attic access.) When I moved in, the exhaust fan was uselessly "exhausting" directly into a ...
1
vote
1answer
78 views

How to fix an ineffective Extraction Fan setup in bathroom

I have an existing IXL (Heat, light and Fan) setup in a small bathroom (12.14 meters cubed). The air exchange rating of the fan meets the spec required for the room, it works and doesn't look that ...
1
vote
1answer
546 views

attaching eye-bolt to roof ridgeline

I would like to attach an eyebolt to the ridgeline of my metal roof. I can then attach a rope to that when I need to work on the roof. I am a climber and have the knowledge and gear to secure ...
1
vote
1answer
87 views

Water leaking behind gutters

I'm a new homeowner and found that water is getting behind my gutters and was hoping someone may have a solution for me. Here's the gutter: Edit: Additional pictures below Video here: https://imgur....
0
votes
2answers
185 views

Install wire rope to several steel tubes?

We have 13 1.5" round steel tubes that go around a small area in our backyard Each tube has a small hole that crosses the tube. I'm including the basic design: I would like to use wire rope (or steel ...
0
votes
2answers
725 views

Roof eave missing knee brace - how to mitigate problems as snow season approaches?

Photos at the end of the post. On an old house (new to me and my partner) there are ~2' eaves extending all around the house, supported by knee braces made of 6"x6" beams and a few 2"x4"s. Inspecting ...
0
votes
1answer
265 views

How to fix cracked roof joist?

I cut open my ceiling drywall to take a peek in my "attic" (about 20" of vertical space) before I go about having a skylight installed. I have a flat roof and I noticed one of the rafter/joists is ...
0
votes
1answer
174 views

temporary roofing repair

Ok so we have a shingle roof that needs to be replaced. We are having some lumber logged off to pay for the repairs. We need to make it for about another 3 months. I was planning on using half inch ...