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
685 views

Moisture/Dew on Roof in Morning

I just had a new roof installed and it looks decent enough. They replaced my metal ventilation with some plastic vents, which is fine, but I'm not sure if it was enough. I had a two layers of asphalt ...
2
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3answers
475 views

How to address mold/moss on newer roof?

I have an old house with a new(er) installed roof shingle that's about 5 years old. In removing leaves from the gutter today, I noticed green moss? mold? around some of the areas close to the house. A ...
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2answers
512 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
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3answers
614 views

Is it safe to use a former furnace flue to vent my dryer through the roof?

Our dryer is located in the center of our house. The current vent situation has tubing that makes several bends between the dryer and the crawl space before hitting metal duct that takes it about 25' ...
2
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1answer
277 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 ...
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2answers
400 views

TV antenna moves a bit - problem?

I'm partway through installing my own outdoor TV antenna. I've gone with a "through the roof and screwed into a beam" method rather than the "sit on top of roof and stabilise using 3-4 wires screwed ...
2
votes
2answers
451 views

What can I do with these roof trusses to cover them up a bit?

Relating to another question about loft conversion I also want to fill up the gaps in between the trusses on which the roof tiles lie on. So during allot of build I heard here and there that some ...
2
votes
3answers
532 views

How do you calculate if it's worth it to insulate?

We live just north of NYC, and the house was built in 1906. We're putting on a new roof and trying to figure out if it's worth it to insulate too. It's a cathedral ceiling on the inside, and we do ...
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3answers
76 views

Leaking flat roof

We have a "flat roof" (actually a very slight pitch) which is made from lead with folded seams. It is rectangular, with a slight slope toward one long side where there is a gutter with a downspout at ...
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2answers
119 views

How can I reduce how much a flat roof heats my house?

My flat roof is insulated with wool, but still it's heating up my room considerably. The situation is much better in the rest of the house. Any ideas how to do a quick fix? The roof is currently ...
2
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2answers
1k views

How do I set up drains for a flat roof?

In the house I'm building, I will be using a flat roof with a parapet around it. The total area will be around 120 sq meter and the roof will be a concrete slab (at least 8 cm). What is the best way ...
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2answers
4k 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 ...
2
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1answer
847 views

Do I need soffit vents for my knee wall attic?

I purchased a 55 year old home that has no soffit vents. The attic space consists of a knee wall attic space and peak attic space. The peak attic space has vents at each end and a ridge vent at the ...
2
votes
1answer
213 views

How do we keep a porch with a fiberglass roof cool?

We have a clear fiberglass roof on our enclosed porch. We just recently put it in. Sun pounds in and by afternoon in the summer, it is SO hot in there. We used to just open the windows and it would ...
2
votes
1answer
143 views

Covering roof vents to keep out roof rats

I have around 20 vents on my roof and I currently do not have a roof rat problem but I want to cover them with something to prevent roof rats getting into the attic. I'm sure I can find something at ...
2
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1answer
355 views

How can I check for possible damage after water leaking into loft chimney?

I had a loose tile on the roof in front of the chimney breast and noticed that in the loft the internal chimney breast was a bit damp. Since then had it repaired (i.e. the tile tapped down and the ...
2
votes
1answer
188 views

Securing our roof against possums [duplicate]

Possible Duplicate: Animal in the attic (possibly a raccoon) We have just finished a major renovation of our house. Since complete, a possum has taken up residence in our roof. ...
2
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1answer
1k views

What are some tips for installing a roof cap?

I am adding bathroom exhaust fans. The roof caps I have attach directly to the duct (this is not the model I have, but it clearly shows how the duct attaches): I had a lot of trouble trying to get ...
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votes
2answers
114 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 ...
2
votes
1answer
311 views

How do I deciding whether to install an attic venting system?

I live in Colorado, and the weather is starting to warm up. In a couple months, the temperatures will rise pretty high. Thankfully, I have a well insulated house (there is over 20 inches of fiberglass ...
2
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0answers
34 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 ...
2
votes
1answer
540 views

How can I build a temporary support for rafters?

I have a hipped roof with 5.5 metre common rafters supported mid span by strutted purlins. The rafters, and below them the ceiling joists, are trimmed around a double flue chimney breast at the flank ...
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2answers
141 views

How to create a conditioned attic?

My attic has reached the point of no return with storage. I must use it for that purpose. So now I have to find a way to insulate the attic's roof. For this DIY handyman dad, does anyone know of a ...
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4answers
996 views

How can I seal around this pipe on my roof?

I have a PVC furnace exhaust pipe coming out through my roof. Unfortunately, the guy who installed it used the wrong size flange. So instead of the rubber rising upwards against the pipe, it is sunken ...
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1answer
726 views

What could cause water to not go into the gutters?

I recently installed vinyl gutters around the roof of my house, but after the first rain I discovered that the gutter doesn't seem to be catching a lot of the water. Much of the water seems to be ...
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1answer
59 views

Exhaust fan leaking from elbow joint connected to the ceiling

I have a metal elbow joint that is leaking. It is connected to an exhaust fan in the bathroom and runs to the roof. What can I wrap the elbow with to stop the leak?
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1answer
128 views

I need a new shingle roof, does the 12/2 minimum pitch still apply if I use peel-n-stick?

Does the 12/2 minimum pitch rule for shingles still apply if peel-n-stick is first applied to the roof deck? Why would I have to put down a membrane on 12/1 pitch above the porch, instead of shingles, ...
1
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1answer
854 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 ...
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1answer
266 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. ...
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1answer
332 views

Are 38mmx72mm roof trusses sufficient for a 6m span?

My roof truss timbers are 38mm x 72mm on 600mm centres with a 6m span. What's that in good old inches? It seems a little skimpy to me; is this normal for a modern house? I am trying to do a rough ...
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1answer
1k views

How do I repair a small rips in roofing felt from inside the loft

I have a normal UK type “cold” roof, with interlocking tiles over the roofing felt. There are a few small rips in the felt about 5cm or 10cm long; I rather not have to get all the tiles removed to ...
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1answer
163 views

Would this solution work with my dehumidifier?

I have a shed built with concrete blocks and a metal roof, terrible condensation in it and every time I go in, I see water on the walls and floor as well as drips on the metal roof. The shed is not ...
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1answer
50 views

Roof Flashing to Brick Wall: Leaks

I have an addition that is attatched to a brick exterior wall, and it appears that the copper counterflashing has come loose from the roof, and is now causing a leak inside the addition. Is it ...
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1answer
88 views

Can you remove a tin roof and install insulation and re-attach the tin roof?

Hello from Hobart Tasmania. I have purchased 1930's weatherboard cottage with a tin roof. The roof is insulated in the main part of the house (i.e., in the attic) but the additions on the house are ...
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2answers
246 views

How do I find where my roof is leaking?

I plan on selling my house within a year to a custom builder who will demolish it and build a new home. Recently rain has been leaking into the bedroom, bathroom, and kitchen. Exactly where in the ...
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1answer
111 views

How can I create a polycarbonate roof valley?

My roof valley is wider than this. I want light to pass in through. Is the polycarbonate I should use? Can I make a joint somewhere in the middle through the length with polycarbonate. I need some ...
1
vote
1answer
271 views

Why am I having an attic ventilation problem this year when I didn't last year?

This winter in the attic I noticed ice on the roofing nails. Obviously warm moist air condensed and then froze on the cold nails. When the weather broke and warmed up a bit, I was back up in the attic ...
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1answer
648 views

Can I use a threaded rod for a rafter tie?

Long story short: I am working on a 1960's house with no rafter ties. The rafters themselves are now attached with screws and strong-ties (previously just double nailed!) but I don't have faith in the ...
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1answer
23k 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). ...
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2answers
1k views

Exhaust fixture for venting bathroom fan through roof

I'm planning to install a roof vent for a bathroom exhaust fan I'm putting in. I'm thinking about using one of these: but I was wondering if I need to worry about it getting blocked by ice or snow? ...
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vote
2answers
277 views

How can I find the source of a leak?

We have a lead lined, concave roof on a bay window. The roof itself has a small drain. Inside the house, below the bay window we have a small leak that occasionaly appears when it rains. I have ...
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1answer
2k views

How do I avoid condensation issues with an insulated garage roof?

Yesterday it was raining (slight overexaggeration of course) :-) inside my garage... Hood of the car was covered with nasty orange water spots. It's an attached garage. There's no garage "ceiling" ...
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1answer
152 views

Conservatory Roof

Our conservatory roof is made from Everlite. The problem we have is that where the roof runs into the drain is constantly filling up with soil, stones and moss. I have no idea where it's all coming ...
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1answer
25 views

What's the true longevity of exposed fastener metal roofs?

I want to replace my roof. Exposed-fastener metal roofs are popular and common where I live, but nobody nearby has owned one long enough to really comment on the longevity. I worry that over time, the ...
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1answer
67 views

Can you extend rake edge on existing gable?

I have a barn on my property with a decent roof - (shingles look good and may have another 5-8 years on them). The rake edge on the gable, however, is perfectly flush with the sides of the barn, NO ...
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1answer
86 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: ...
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0answers
88 views

Is this the correct way to vent my roof?

We recently bought a 1950s vintage house with no soffits, i.e. no roof overhang. Thus there are no soffit vents in my attic, only a ridge vent and 2 gable vents, one with a powered fan. However, those ...
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2answers
83 views

How can I inspect and repair a roof with moss and other greenery on it?

I have a pantry on my house, its attached to the kitchen but has its own slated roof and an outside wall. I have has issues with it getting damp, I have replaced the outside door as that was leaky, ...
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0answers
164 views

Can I repair damage caused by a roof leak myself? [closed]

To fix the exterrior wall, inside the wall and interrior wall can I have friends who are builders help me or do I have to go with a contractor? Also do I need a building permit for this. I had my ...
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2answers
454 views

How can I best seal this gutter to the flat rubber roof of my garage?

I have a standalone garage built into the side of the hill. On top is a rubber roof that appears to be in decent shape. However, there is a gutter around the edges that is not sealed to the roof. ...