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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1answer
40 views

Identifying and fixing leak sources, relevant cracks and water flow on a flat concrete roof?

I'm asking this here to avoid being conned by "professional" roofers in India who either exaggerate their estimates or send highly unskilled labourers to do the job. This is the layout of a roof: ...
2
votes
1answer
93 views

What's the proper way to flash an inside roofing corner, with self-stick membrane?

What's the proper detail to apply membrane or tar paper to an inside roofing corner, where a sloped roof meets a higher wall at a corner? Of course a metal flashing goes on top of of the membrane, and ...
2
votes
2answers
624 views

Gable and Roof Vents Together?

I need to add some additional exhaust venting to my attics, along with some along the soffit as well. I need some knowledge on a few things as I can't seem to find answers for them on the interwebs: ...
3
votes
2answers
44 views

Improvising a temporary skylight?

I have a skylight that is essentially a flashed plywood curb with a late 50's era glass paver that "cups" over top. No tar or caulk, just gravity holding it there. Now, because I'm an idiot, I decided ...
2
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2answers
40 views

Flat roof ponding near drain - should roof be raised?

We recently raised a dipped section of our flat roof in order to reduce ponding. We're not sure we've raised the roof enough. Here's what it looked like as the rains died down. Do you all think we ...
1
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2answers
80 views

Do you leave the heating cables for the roof/ gutter on 24 hours a day?

Do you leave electric heating cables for the roof/gutter on 24 hours a day?
3
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2answers
146 views

Repairing a notched rafter in a truss roof

I had a guy install a whirlybird-type vent in my roof.. those non-powered turbine types. Upon cutting the hole to install the vent, he accidentally cut a notch in the rafter: ). There are two ...
1
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2answers
135 views

What should I do about nails that are protruding through the soffit?

Had new roof put on, but when I came home the nails had come through the soffit and split the wood and protrude. Roofer wants to clip off nail, and wood putty the wood. I don't think this is a good ...
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3answers
652 views

What size beam do I need, and can I build one from lumber and steel?

I want to support a 20 ft. span of my roof where two roofs come together. My house is was originally 46'by 20'. A 40'by 12' addition was added, making an L shape, and when they put the beam in they ...
15
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2answers
73k 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 ...
1
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1answer
53 views

Name for Clerestory roof with windows at ridgeline?

I know the term "clerestory" can be applied to a variety of rooflines which permit windows above the normal top of the interior walls, but was wondering if there's a specific name for the version ...
6
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2answers
1k views

What is the lifespan of plywood as roof decking?

We have a 30 year old roof in New England, which we have begun to interview roofers for this spring/summer. The topic of plywood has come up and 2 have said we definitely need to replace the ...
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2answers
58 views

Fixing Animal Entry at the Roofline

After a raccoon finally left my attic, I had the roof repaired. The roofer pointed out a problem that has apparently existed since the house was constructed. As the first picture below shows, far back ...
6
votes
1answer
7k views

How can I lengthen my vent stack and are there any negative effects in doing so?

I have observed that when we receive a lot of snow here in Ontario, at least one of the drain vents on my roof is covered by snow. While after one winter in the house I have not yet observed any ill-...
4
votes
4answers
460 views

Bathroom vent through existing roof vent

I have a roof with two gable vents as well as slanted vents that look a lot like these one: I do not want to install an extra vent specifically for bathroom so I was wondering if I could use one of ...
4
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4answers
1k 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 ...
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2answers
83 views

Coping stone mismatch on corner of roof causing water damage to my wall

I moved into my house 18 months ago and the back of my flat roof extension has drainage issues. You can see from the picture that the coping stones don't fit correctly on the corner (red circle) ...
0
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0answers
26 views

Doors will not open

I had a new roof put on about 2 weeks later my doors to the out side would not open? I think it has something to do with new roof at the same time my house started to sweat, the exterior walls were ...
1
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2answers
122 views

Leaking roof valley strategy

UPDATE: New album with additional photos here: http://imgur.com/a/RGfrP My parent's house has a pretty bad leak that has been going for a few years. Because of money and other issues with the house ...
6
votes
9answers
15k 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 ...
5
votes
3answers
25k 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 ...
3
votes
1answer
312 views

Getting R38 in roof with 2x8 rafters

I was planning to use foil faced 2" polyiso plus an air gap, plus 5 1/2 rock wool, to get 13+3+23, or r39. But this is all between the rafters below the roof deck, and the polyiso is impermeable. If ...
3
votes
2answers
116 views

How to protect exterior galvanized flashing?

With ships, they'll bolt zinc blocks on, can I "re-galvanize" metal? I ask as I have some flashing that was likely installed in 1938. It was galvanized and is in reasonably good shape. But replacing ...
0
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1answer
59 views

Keeping heating wires secured to roof during snow removal

I have heating wires on my roof but still got bad ice dams the first winter I lived here. This caused leaking and I got my roof repaired. The 2nd year I used a roof shovel and heating elements. That ...
2
votes
1answer
113 views

Roof trusses left out in rain, are they still good?

I experienced a house fire in May 2015. The house is undergoing a full gut job. The roof has to be completely replaced. Unfortunately, I hired the wrong contractor and they have been taking their ...
4
votes
4answers
9k 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 ...
0
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1answer
111 views

Do I need Attic Fan in Garage?

My garage is about 20" x 24" and I have made attic in the Garage by adding plywood, insulation & sheet-rock, It is nicely done and as soon I finish this project, i realize, i do not any ...
0
votes
3answers
38 views

Should I add another gable vent to my attic?

I have a long house with a 3 sq foot gable vent on the east end. I have two 6 ft long roof vents in the middle and I want to know if I should install another gable vent at the west end to increase ...
1
vote
1answer
47 views

Safely Driving Nails Into Roof

I am looking at a job where I will be driving nails into the apex of a roof to secure roof anchors. My concern is accidentally hitting an electrical line on the underside of the roof. Is this an ...
1
vote
2answers
79 views

Chimney crown repair - cover holes in bricks?

Getting ready to repair the chimney crown, using this Family Handyman article as a guide. On our chimney, there is a line of bricks around the crown that have exposed holes in them. The holes are ...
2
votes
2answers
1k 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
1answer
798 views

Ceiling leaks When it Rains, Roof Looks Good

My ceiling drips water sometimes when it rains (especially when it rains hard). It seems inconsistent though, so I think that it may have something to do with the angle at which the rain comes in. The ...
2
votes
2answers
944 views

Is a thick, unvented hot roof a good candidate for spray foam?

Upon removing some drywall from an unvented hot roof I noticed two serious issues: 1) The roof sheathing is not a taped or sealed ply but a 2x8 T&G 2) There is no vapor barrier and the cavity ...
2
votes
2answers
395 views

Do I need soffit vents and can I add them without taking the roof apart?

Last year, we re-roofed out 83-year old house. We removed the 3-layer cedar/asphalt shingles and laid plywood decking, 30# paper, ice-barrier and 26-gauge metal roofing. As far as ventilation, we just ...
9
votes
3answers
24k 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 ...
5
votes
4answers
9k 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 ...
0
votes
1answer
82 views

Concerns about cutting into roof for attic access?

I've spoken with a contractor who proposes cutting a hole in the roof of our circa 1900 house to access the attic for installing insulation. This intuitively seems like a bad idea--that it could ...
0
votes
1answer
3k views

How to calculate steel beam and posts size to replace existing wood beam in terrace

I have a covered terrace that extends 10' out (West) from the house towards the yard/pool and has a width/span of 32'. The current beam is made up of (2) 2x6 in wood placed side-by-side functioning ...
0
votes
1answer
199 views

Which foam to use for temporary leak remediation?

I have a leak around a vent pipe in my attic. Unfortunately I cannot get someone out to fix it for several days, and we have a hurricane coming so I can only imagine the rain is going to get worse. ...
0
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0answers
20 views

Fascia lining modified bitumen roof

I have a low pitch modified bitumen roof. On the low side it has lumber fascia lining the walls underneath it. I need to replace that fascia because it is rotten and parts have holes for squirrels to ...
2
votes
1answer
140 views

How can I prevent/divert rain water from dripping on a flat flashing?

I'm helping maintain a set of townhome units and the homeowners are reporting an annoying drip sound just outside their bedroom when it lightly rains (which is quite often). Apparently the sound is ...
1
vote
1answer
2k views

How can I modify this dryer vent cap to keep lint from getting trapped?

As mentioned in this question I installed this dryer vent cap on my roof As you can see, there is a gap between the flashing and the cap, presumably to let water out if it gets in. This is ...
0
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0answers
43 views

How close to the roof can I drywall in my garage?

I'd like to drywall the entire garage ceiling and I have a tall peak in the roof near the back where the garage roof meets the house roof. I'd love to keep the high ceiling, make some high shelves or ...
0
votes
1answer
86 views

Are 2x4 rafters legal in Connecticut? 13 ft runs

so I bought a REO house and about to redo the roof above the garage. I've noticed that I need to replace some rafters. However - I'm seeing that rafter are 2x4... Is that code-legal? p.s. by 13 ft ...
0
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2answers
32 views

I do have a lot of ice and snow on the roof should I install an ice melting cables

I don't have ice damming but do have a lot of ice and snow on the roof should I install a ice melting cables?
17
votes
10answers
29k 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 ...
3
votes
1answer
378 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 ...
0
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0answers
34 views

False ceiling to cover the roof

What is the best way to install false ceiling in room with gaddar and rock slabs. Roof view
5
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2answers
9k 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 ...
4
votes
3answers
15k views

How do I build a Gambrel roof?

We would like to put a Gambrel Roof on a 32 x 32 log cabin we're building but I don't know the formula or how to build the Gambrel roof. Please help We're building this cabin ourselves and love the ...