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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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 ...
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3answers
59 views

Is 1/2" plywood standard and appropriate for a roof replacement?

A local roofer submitted a proposal to me for a roof placement that included replacing rotten plywood with 1/2" CDX. The existing plywood on my roof is only 3/8". I thought perhaps he made a ...
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42 views

New Roof - Exposed Nail Heads

Have new roof with exposed nail heads at ridge. Roofer's fix was to cut tiny squares of shingle and goop/glue to top of nail heads. Need inputs from roofers; what is the proper way to fix the ...
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2answers
39 views

Is this algae or moss? How to remove it without damaging the shingles?

I live in the Seattle area. Below is a picture my roof. What are the green traces on the roof. Is this algae or moss? What is the easiest way to remove it without damaging the shingles and the paint?...
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2answers
130 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 ...
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1answer
156 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 ...
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2answers
898 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 ...
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3answers
301 views

How do I protect and insulate a ceiling built against the roof?

My upper floor used to be a large attic. Sometime in the past the entire space was converted to living space: 2 bedrooms, 2 finished closets, and two unfinished storage "closets". Much of the ...
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2answers
193 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 ...
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1answer
83 views

Should this roof be fixed now (shingles)?

My wife and I just bought a house, and it looks like the previous owners did a partial repair job on the roof. Shingles on the front of the house look OK, but the back not so much. I see some granules ...
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2answers
509 views

Hardware (clamp and/or spacers) to mount a horizontal pipe to a roof?

Related question: What is this called (adjustable angle pipe footplate)? After posting that previous question, I began to think that there's likely both a cheaper, and sturdier way to accomplish what ...
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1answer
313 views

Is that a leak from roof into my ceiling?

I found a spot into my ceiling that was not there before. Spot looks like this. We had rain last night and i am worried if there is a leakage in the roof. This is what is on top of it. Is this ...
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1answer
995 views

How to flash a roof valley on parallel roofs

I'm redoing my entire roof (roof deck included). The previous owner built a carport parallel to the house. The carport is a permanent structure with a normal roof - trusses and whatnot of equal ...
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4answers
4k 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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2answers
390 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
735 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
4k 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
192 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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2answers
23 views

Do I need a moisture barrier when insulating a metal roof with compressed Styrofoam?

I have a cabin with a metal roof and plywood underlay and want to use compressed Styrofoam to insulate between the rafters. Do I need a moisture barrier and how would I install this?
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1answer
15 views

Can a 290mm x 45mm lvl beam be used as a structural ridge beam?

Also are ridge beams only used for exposed ceilings, or can you install ceiling joists which are connected to the rafters, - i assume this would provide extra support. This is for a single story ...
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1answer
131 views

Extend Roof for Patio Cover

I have a corner patio area that I want to cover by extending the current roof. The side is 14.5' long and 9.5' wide. The slope is along the 9.5' side. I want to extend the roof line marked with ...
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1answer
63 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 ...
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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 ...
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1answer
987 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 ...
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2answers
55 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 ...
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1answer
850 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 silicone,...
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2answers
137 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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2answers
303 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 ...
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1answer
90 views

Conflict with roofer [closed]

I hired a local roofer to redo my roof. One of the items in the contract is to "INSTALL 7/16” OSB SHEATHING OVER EXISTING ROOF BOARDS." The roof boards are rough sawn 3/4 inch thick pine, with a 1/2 - ...
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2answers
108 views

Can I insulate flat roof using this method?

I just wonder if I can insulate my flat roof in northern India by following steps as under: Apply a cover of Bitumen Cover it with polythene (for water proofing) Lay used cement bags on polythene (...
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1answer
352 views

Flow rate of water in a gutter system

I am attempting to build a waterfall out of a gutter system. I currently have an awning that is 72" by 48" with 3" high (tentatively) buffers on each side to keep the water from flowing off. The ...
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3answers
569 views

Should I add wood sheathing to a metal roof car port?

I'm making a carport that is about 10 feet wide with 2x6's for the "roof frame" and 4x6 posts. I was going to use a medal roof using tin I think. Do I first need to put down wood sheathing? Or can I ...
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1answer
142 views

How do we properly insulate a loft ceiling with 2“ by 4” without loosing space?

We have recently started a home improvement project that involved completely redoing all of our vaulted ceilings. We have a loft area that was about 6 foot in height at the peak. When we did the demo ...
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2answers
98 views

How to stop this small roof from leaking?

We have water stains in the ceiling drywall underneath this small section of roof. I suspect it's due to the loose metal that's on top of the shingles. The fasteners on the top of the metal are ...
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1answer
359 views

Is it ok to re-slope one of my gutters to another gutter?

Right now, on one side of my roof, I have two gutters that come together at an inside corner. Each gutter goes to the edge of the house with a downspout, which would mean that the inside corner is the ...
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1answer
3k 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
2k views

Attic Venting of Knee Wall in Cape Cod

I have a cape cod style home, pictured below. The second story living space on the back side of the home is created by having a lower pitched roof. So, the front and back sides of the roof have ...
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1answer
859 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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1answer
523 views

From metal roof to composite shingles, mold and water issues?

So we had our roof replaced in 2007 from a ribbed metal roof to a comp roof. We also live in Washington State in a gambrel roofed home with no duct work and about a 4' by 12' attic. During the tear ...
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2answers
288 views

How do I find the source of a slow leak in a roof that has been repaired?

We have had a slow leak for 20 years. The roof has been replaced. We still have the leak, so how do we find the leak?
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1answer
195 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 ...
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1answer
2k 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
2k 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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2answers
511 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
216 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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0answers
24 views

What lintel to use above bi-fold doors in man cave?

I'm building a man cave in the corner of my garden, the base is finished already, now I'm planning the build from the ground up The structure will be 2.5 metres high and will have a flat roof (rubber)...
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0answers
41 views

Is it safe to use a blower to clean debris off a shingle roof?

I would like to routinely (once a month) clean the debris (leaves, sticks, pollen, etc.) that collects on my shingle roof because of the shallow pitch: Rather than use a soft broom to brush the ...
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1answer
42 views

How to repair small area of damaged/loose plywood sheathe on roof?

I have a small section at a corner of my roof where the plywood has come lose and a gap has appeared. It is on a part of the roof that is not easy to see, and unfortunately some birds have started ...
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2answers
60 views

Mold and an insulated shed roof

Thanks in advance for any answers. I have just had a shed installed which is built onto the side of our house. It has a metal roof, with OSB board under it (there are wooden noggins to support it). ...