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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2answers
51 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). ...
2
votes
4answers
415 views

Leaking corrugated metal roof

I have a place that has a corrugated metal roof under a wood deck. It's a pretty large area, maybe 40' x 40'. When it rains, water leaks through some of the nails. The deck boards are not nailed ...
0
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2answers
838 views

What are the advantages and disadvantages of elastomeric coatings versus shingles?

I'm ready to reroof my house and want to consider an elastomeric coating rather than replacing the existing shingles. I'd use a local contractor either way
4
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10answers
13k 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.
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1answer
43 views

Attic Ventilation Improvement

Location: Portland, Oregon, USA area House: 1972 single story, approx 1500 sf attic area. When we bought the house the prior owners paid for attic mold remediation. I believe the mold was a result ...
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0answers
15 views

What's the proper way for an awning roof to sit on the rafters(?)?

We have some roof covering our patio. There is about a half-inch gap between the OSB that makes up the roof, and I guess they're called rafters? Whatever they are that form the edge of the roof line. ...
1
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3answers
63 views

Is it more work to replace or remove a skylight?

We have a 20 year old leaking skylight, and right now I am contemplating either removing or replacing it. Not exactly sure why it is leaking, perhaps the flashing is bad, but it's leaked for a while. ...
1
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0answers
35 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 ...
0
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1answer
32 views

How much can venting cool the top floors?

I recently bought a house -- big, beautiful sucker built in 1900, with two full stories and a third that's essentially a very nicely finished attic. I had a contractor give me an estimate for ...
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3answers
1k views

How to properly ventilate a Mansard Roof?

I recently purchased a home with a Mansard roof, I had some roofers come to give quotes to replace the top (it is finished) and they all recommend adding ventilation (known issue with Mansard's). ...
1
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1answer
44 views

Can I use 2“x6” as roof rafters for porch addition over concrete patio?

If I tie into a 6/12 pitch roof with 2x6's. Will I be able to span a concrete slab of 11' 6"? I will be setting 4x4 post every 6' with 2 2x6's with 1/2" osb sandwiched between them as the form to set ...
1
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1answer
36 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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1answer
21 views

replacing roof screw

My Metal roof is 20 years old and a roofer told me to replace the screws with a bigger size. how do I determine my screw size? roof screws seem to have their own standards #10, #12, #14, #16... what ...
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0answers
26 views

roof ridge beam support

I am building my son a batting cage that measures 14'x40'. I have finished the concrete slab and I am now framing a 3/12 pitch roof over it using rafters and not joists. The roof will be supported by ...
0
votes
0answers
14 views

Is my “modified bitumen” roof installed correctly?

Album here: http://imgur.com/a/3NhKm My new roof was installed last week. I had a 400 sq. foot section of flat roof that was supposed to receive modified bitumen. I wanted to add a bit of pitch but ...
0
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0answers
15 views

Would adding ceiling joists in combination with a ridge beam reduce the reaction force of the ridge beam supports?

so think of a normal coupled roof design, with ceiling joists acting as ties for the rafters, except the rafters aren't attached to a ridge board, but a structural ridge beam. Would this configuration ...
0
votes
1answer
62 views

Can a structural ridge beam be used in a hip roof design?

If so this would place the ridge beam somewhere in the middle of the roof, how would you provide support for the ridge beam in this instance?, could you support it by an internal wall? This is for a ...
1
vote
1answer
13 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 ...
0
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1answer
1k views

How should the top edge of an asphalt shed-type roof be finished?

Our contemporary house has a shed roof that is finished with a layer of aluminum flashing nailed through the top course of shingles. The flashing turns down and just covers the top edge of the ...
3
votes
4answers
947 views

Does a roof with 3 layers of asphalt shingles somehow last longer?

I have a building with 3 roofs on it, the top layer is starting to curl, etc, due to its age. My question is if having 3 layers of shingles will extend the useful life of the roof? I know this is ...
1
vote
1answer
40 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 ...
0
votes
1answer
34 views

Fixing (at least temporarily) roof damaged wooden beam (rafter?) in an outbuilding

Outside my house there is an outbuilding. I am not sure of the roofing terms in English, but trying. On of the roof beams, the center one on this picture (a rafter?) is heavily damaged at its base, ...
0
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0answers
22 views

What is the appropriate type of caulk/sealant to use to connect evaporative/swamp cooler to roof duct?

I recently had my house re-roofed (flat roof, tar & gravel type). In order to do so, the roofers had to get the swamp cooler out of the way. My cooler is attached to a duct protruding upwards ...
0
votes
1answer
33 views

Why do you double the bottom row of asphalt shingles

I've been taught that when you lay shingles, the first (bottom) row on the eave should have a double row, and that the bottom one is placed upside down. Why?
0
votes
1answer
108 views
0
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3answers
71 views

What to paint a rusting metal roof with

I have a bump out in front of the house with a sloped metal roof on it that is rusting. I want to fix this before it becomes a problem but I can not find reliable advice for my particular situation. ...
4
votes
3answers
253 views

Adding an eaves drip edge to an existing roof installation

There is some water dripping behind the gutter, and I am thinking of installing a drip edge. From what I read a drip edge is installed under the ice water shield at the eaves. The ice water shield ...
0
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0answers
13 views

Home Flat open roof Repair mortar

my house roof flat make RCC.roof has joints 30feet long,there is a crack 5cm wide,5cm deep,and 30feet long,How can i fillup it.what do i use cement sand concrete than water stop leak?
3
votes
1answer
60 views

WIll electric pressure washer work with low water pressure?

I live in a 5th floor of a building that doesn't have strong water pressure. I remember that many years ago a cleaning group was going to pressure-wash the exterior of the building, but couldn't ...
6
votes
3answers
143 views

How to fix eaten/rotten rafter

I need to repair some rotten 5"x3.5" (actual size) rafters (the one in the pic is the worst). I'm thinking about using a pair of unequal length 2x6s to create a sort of half-lap joint with the cut-...
2
votes
2answers
658 views

What should I do about shingles that are stuck to the sheathing?

I'm so pleased to find this diy.stackexchange. I'm in the middle of replacing a small roof above an entry-way. It is an area of about 100 square feet (9.3 square meters). The top layer of shingles ...
1
vote
5answers
8k views

Best shoes for walking on a standing seam metal roof?

I went up on my roof this weekend to do some work on an antenna and clean chimneys. It's the first time I've been up there since I replaced the hail damaged asphalt shingles with standing seam steel. ...
14
votes
7answers
23k views

What are the pros and cons of steel vs. aluminum metal roofing?

I'm considering a new roof for my suburban home. The home is about fourteen years old and the shingles are in so-so shape. We have had two leaks already and I've been told that means it is a good ...
0
votes
1answer
83 views

Worried about cracked rafters in house built 1985

There are cracks and dry rot in the rafters of this house, and I'm wondering how urgently they need to be fixed: support rafter where brace is located, crack runs widthwise almost entire width ...
0
votes
0answers
42 views

Roof Fascia -> Do I need aluminum around fascia? Does fascia have to go over siding?

I'm about to redo a garage roof. (Existing roof picture is below.) I think I understand how most things come together: rafters, plywood, felt, ice shield, shingles, flashing. The things I don 't ...
2
votes
2answers
116 views

Ceiling wet at corner of chimney

Whenever it rains, the ceiling becomes wet at the corner of the chimney. I ASSUME it's just a small leak, but obviously I don't want it to become any worse. I have a flat roof, so getting up there ...
6
votes
4answers
3k views

Does this 2x4 support my gable ridge?

I'm installing a floor in my attic. To open up the space and simplify the flooring I'm removing temporary construction bracing. Most of the bracing is easy to identify, since it clearly does not ...
2
votes
1answer
186 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 ...
0
votes
1answer
71 views

When re-roofing and doing a tear-off do I have replace the roof deck with plywood?

My home was build in 1920 and uses planks for the roof deck. I was planning on just removing the old asphalt shingles and installing new asphalt shingles. Makes sense to me; until a contractor friend ...
4
votes
1answer
126 views

How should I repair a cracked trough roof beam?

My garage has a 17' 2x8 ridge beam. The roof is a V, lowest in the center, with 2x4 rafters nailed to the sides of this ridge piece. At some point the roof drain clogged, the roof turned into a ...
3
votes
2answers
1k views

Insulating a post and beam construction roof/cathedral ceiling

My house (built 1972) has a cathedral ceiling with post-and-beam construction in the main room. The ceiling temperature can get as high as 90F, or even greater on a very hot sunny summer day, as ...
4
votes
2answers
120 views

Is it better to fill up the space between rafters with insulation, or put baffles on top and add soffit vents? (inland Los Angeles, cathedral ceiling)

I have 5.25" tall rafters, about 30" on center, with roof planks directly on top of them. I would like to keep the rafters visible, but add insulation between them. So I only have a few inches to work ...
0
votes
3answers
870 views

Why should I repair/replace roof just because it's old?

My roof is old. Shingles are worn down, some are torn, and there are some nails coming through some shingles. I'm being told by some contractors there for other reasons that my roof needs immediate ...
1
vote
1answer
109 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 ...
4
votes
3answers
113 views

How can I calculate covered area under a single-slope roof?

I'm looking to build a small covered patio area on our property, next to our pool. It'll be open on all sides, and covered by a simple skillion/single-sloped roof. So something like in this photo: ...
4
votes
3answers
88 views

Redoing my roof: how should I redo my insulation?

I live in Denver. My 60 year old house is 1.5 stories. The upstairs has a highly sloped roof and definitely has insulation in the relatively narrow attic and I believe has insulation at the angled ...
3
votes
3answers
1k views

How to leak proof roof?

I'm working on converting an external garage into an office. I've removed the original flat roof and replaced with a pitched roof. I designed and built the roof trusses myself. I then put ...
5
votes
4answers
197 views

How effective to use zinc strip to prevent roof moss

I live in Seattle. My 6 years old composite shingles start to grow moss this year. I read one post on YouTube that you can use a long zinc strip placed on top of your roof to prevent moss. I am ...
1
vote
2answers
36 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?...
0
votes
0answers
41 views

Decking on a Metal Roof

I can't say for sure that I've ever seen a deck on a metal roof... is it against code? If not, can anyone point me in the right direction for information about building a deck (or a crows nest) on top ...