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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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
105 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 ...
0
votes
1answer
43 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
69 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
918 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
435 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
924 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
359 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 ...
4
votes
8answers
11k 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.
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
64 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
150 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
112 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
37 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
74 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
30 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
375 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
27 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
174 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
44 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
519 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
120 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
74 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
97 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 ...
0
votes
0answers
48 views

Ceiling water stains… roof appears fine

For the last 18 months i keep getting Water Stains in a 2nd floor bedroom and hallway. My handyman, and two roofers say the roof looks fine. I've had vents caulked but I've been unable to find the ...
1
vote
1answer
570 views

What type of caulk can I use between the furnace vent pipe & flashing on a roof?

Looking to seal a gap between my furnace's vent pipe & the flashing on the roof, specifically here: I'll have to check if there's a missing storm collar too, but should I use High-temp ...
106
votes
7answers
7k 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 ...
0
votes
2answers
541 views

Roof Decking: Plywood/OSB over skip sheathing (decking) or should I strip to the rafters?

I have a shake roof (looks like the original from 1952!) with skip sheathing. Then an asphalt shingle re-roof over that (that makes 2 roofs in 60 years, thanks previous owners!). I have repairs and ...
0
votes
0answers
67 views

Roof joists size and spacing

I am in process of building a 12'x16 lean to shed for a customer using (9) concrete peirs. 4x6 runners--16' long 2x6 floor joists 2x4 wall construction The roof slopes from the front to the ...
1
vote
2answers
381 views

Mould on the inside of a bitumen corrugated sheet

Attached to the end of our house is a small shed. It has four (newly built) brick walls and a bitumen corrugated sheet roof. The shed was finished about eight months ago and is fairly waterproof. ...
3
votes
4answers
15k 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?
2
votes
2answers
108k views

What is the minimum roof slope to accommodate rainwater drainage?

I have a patio with a 13ft(4m) by 26ft (8m) Roof, the slope runs vertically down the short (13ft) side.. and the height difference from the high point to the low point is only about 10in (25cm). ...
1
vote
2answers
599 views

Bringing unused chimney down below roof line?

I'm in the middle of renovating a balloon-framed house from the 1890's. The house is currently gutted. It originally had a standing-seam metal roof that was penetrated by a central chimney. At some ...
2
votes
1answer
183 views

Should I insulate my attic with a hot or cold roof?

I'm turning my 3rd floor attic into a usable space. It's a hip roof, 25' x 23', with one dormer. We just had new asphalt singles put on it and it was about 12 foot of ridge vent on the dormer / ...
1
vote
2answers
233 views

Possibilities for shielding porch deck from rain

My porch is farmhouse style (low to ground, no railing), and fairly narrow. The (metal) roof is exactly as deep as the deck. One annoyance that I have is that when it rains, the water coming off the ...
0
votes
1answer
51 views

Galvanized Gutters Required For Dormer With Rubber Roof?

I have a long dormer and currently there is no gutter, water just runs off and is starting to seep into my basement. I got an estimate to install gutters on the dormer and the contractor said that ...
1
vote
2answers
161 views

Is it economically reasonable to cool the roof by water evaporation

I want to estimate the outcome before going into hassle of installing the sprinklers/mist emitters. I have a place on the last floor, you can call it an attic, directly under a flat roof which is ...
0
votes
2answers
125 views

Considerations for spray foam insulation with roof replacement possible in about 10 years

We have an old house in the Philadelphia area which we bought last year. This has a slate roof and we were told by our home inspector that we'd need to consider replacing it in 10 years. It is the ...
5
votes
1answer
6k 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 ...