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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15
votes
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
vote
1answer
47 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
votes
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 ...
0
votes
2answers
57 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 ...
4
votes
4answers
377 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
votes
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 ...
1
vote
2answers
72 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
votes
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
vote
2answers
106 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
24k 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
291 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
112 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
votes
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
84 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
votes
1answer
109 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
45 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
75 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
966 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
557 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
931 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
370 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
8k 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
73 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
174 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
votes
0answers
19 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
125 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
votes
0answers
42 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
78 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
votes
2answers
31 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
28k 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
376 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
votes
0answers
30 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
votes
2answers
8k 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
14k 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 ...
6
votes
4answers
21k views

Does water dripping through my soffit indicate a problem?

When it rains, water drips through the soffit and along the inside face of the fascia. This picture shows the water dripping through, but when it rains harder sometimes there's more: My landlord ...
2
votes
1answer
181 views

What type of furnace vent pipe is this?

I need to extend my furnace vent pipe up 2 foot above the ridge of my roof to comply with IBC. So I need to couple this pipe somehow and extend it up. Any idea what type of pipe this is and how I ...
1
vote
2answers
46 views

South Florida roof softit roof ventilation and of insulation batts

I live in south Florida and am insulating the roof by placing batts between the rafters. I'm not sure if placing the batts up against the edge where the beams and walls meet is ok or not. The rafters ...
2
votes
1answer
542 views

Should I keep downspout extenders installed during the winter?

Should downspout extenders be kept installed during winter? For some reason, I think they facilitate ice formation to creep up the spout? When I say downspout extenders, I mean these
0
votes
1answer
44 views

Can fiberglass insulation cause leaks?

I've recently bought a 100 year old wood frame house from a DiY guy who took decent care of the place. He didn't put any insulation in the attic though and my home inspector said insulation is a great ...
1
vote
1answer
128 views

I have two roof drains, can I seal one of them?

My house has a flat roof and leaks, mostly directly underneath the drains. I've had problems with leaking around the drains since I've owned the house, mostly dripping, but over time it's turned ...
1
vote
0answers
76 views

possible to have too much soffit intake venting for roof/attic?

Is it possible to have too much soffit intake? Currently my simple gable roof on a ranch home has 8 RVO38 vents but NO soffit intake vents (terrible!). Of course the attic space runs incredibly hot ...
6
votes
2answers
1k views

How can I keep animals out of my chimney?

I own a three story house with two chimneys. The chimney in the center of the house has two flue liners, one of which is used by our hot water heater and the other was for a fireplace that is sealed ...
2
votes
2answers
100 views

How to prevent squirrels from damaging pipe boots?

I have a few pipe boots on my roof that squirrels like to munch on. I'm not sure why but it creates a lot of work for me. How can I prevent this from happening again once I fix the boot? This is ...