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9
votes
1answer
469 views

Is it a good idea to lay a second course of shingles over an existing shingled roof?

My shingles were a little worse for wear and I had a "friend-of-a-friend-who-used-to-be-a-roofer" come take a look at it and he said I could save some money on the demolition by just laying another ...
7
votes
5answers
4k views

Should shingles have bubbles in a new roof?

I just had a roof repaired (shingles replaced) because of hail damage. As far as I can tell, everything looks good. Except for one section, there's what I would only describe as a large bubble. Are ...
7
votes
2answers
10k views

What size ceiling joists and rafters should I use for a 14' span?

I'm going to build a single story addition to my home with a width of 14ft. I plan on using ceiling joists every 16" but I'm not sure which size to get. The roof will be asphalt shingles and the attic ...
7
votes
2answers
140 views

Maintaining a Thatched Roof

Is there anything I can do to prolong the life of my thatched roof? Should I attempt to remove moss etc?
6
votes
2answers
6k views

Can I make the contractor redo a roofing job because he didn't replace delaminated plywood?

My wife and I recently moved into our first home. It's a raised ranch in CT that was built in 1967. I've been doing a lot of "refreshing" myself inside; however, I hired a roofing contractor to ...
6
votes
2answers
3k views

How is installing roof sheathing horizontally stronger than vertically?

Prompted by a comment in this answer: What is better for a roof, plywood or OSB? Why is it stronger to install roof sheathing horizontally? Yes, it ties in more rafters, but in what manner is that ...
6
votes
3answers
5k views

What do I do with a leaky roof in the middle of January?

I removed the ceiling Sheetrock and insulation during a bathroom remodel in my master bathroom on the 2nd floor of my house. I have snow on the roof that is melting and I found two small drips coming ...
6
votes
2answers
534 views

When is it time to replace the roof?

I've read several some of the guides out there (examples here and here) on this topic. I've found a shingle in the yard a couple times (after heavy wind/rain), and at times I've seen a few granules ...
6
votes
2answers
1k views

Can you skin over an existing roof deck that is breaking down?

Working on reshingling my roof. The roof deck turned out to be 3/8" plywood which is starting to break down due to the number of times the roof has been replaced. The deck is not rotting out except ...
6
votes
1answer
996 views

How to properly seal/cover an unused chimney?

We recently replaced an ancient chimney-vented boiler with a direct-vented one. This boiler was the only thing using our chimney. The chimney is brick and sits in the center of our 120-year-old house. ...
5
votes
2answers
219 views

Replacing damaged shingles

In a recent storm a few shingles were damaged and need to be replaced, so I figured this might be a good question for the site. What's the proper procedure for replacing single asphalt shingles?
5
votes
1answer
163 views

Hangman's Noose vs Uni Knot

Is there any practical difference between the Hangman's Noose and the Uni Knot (a.k.a. Duncan loop)? The difference I see between the two is that the coils are wound inside the loop in the uni knot ...
5
votes
1answer
605 views

Will combining roof venting systems cause short cycling?

I'm looking into buying a new house here in Wisconsin that has soffit vents, ridge vents and some additional static roof vents installed. However, when the home inspector came through he said that ...
5
votes
1answer
4k views

What advantages do ridge cap shingles have over modified 3-tab shingles?

I'm preparing to re shingle my roof. I'm not sure if I should use ridge cap shingles, or simply cut up 3-tab shingles for the ridge cap. Do ridge cap shingles have any advantages over ...
5
votes
1answer
148 views

What (animal?) made a 0.75" diameter hole through my asphalt shingles?

Something made a tidy 3/4" diameter hole through my 8-year old 3-tab composite roof shingles. (~45 deg pitch, if it matters) I suspect it was a woodpecker (they used to go at the side of the house, ...
4
votes
3answers
3k 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 ...
4
votes
10answers
19k views

What are the pros/cons of Ondura for roofing?

I came across Ondura in Lowes this morning and had never heard of it. It looks pretty slick. Does anyone have experience with it to share? I found no matches when searching here and was sort of ...
4
votes
2answers
12k views

How can I prevent water from getting behind the gutter?

A friend of mine is having a water problem; the water is coming down behind the gutter. It turns out the drip edge isn't covering up the gutter completely on the one side for a considerable length of ...
4
votes
6answers
36k views

What are the pros and cons of Owens Corning shingles vs. GAF shingles?

I am looking to get a new roof for my house. I have taken quotes from about 4 contractors and 3 of them are suggesting I should use GAF shingles. 1 suggests that Owens Corning is a better shingle and ...
4
votes
3answers
6k views

Is it normal to see nails coming through the roof decking after a new roof was installed?

Our home was built in 1954, and is a Florida ranch style home. We have about a two-foot overhanging soffit with trusses that show and with tongue and groove under whatever that’s called. Sorry, I ...
4
votes
5answers
48k views

What tool should I use to cut metal roofing?

I'm getting ready to install metal roofing on my building project. Wee! But I'm not sure how I should cut it. The roof is a simple gable, 20ft long, with 8ft rafters. The roofing I'm using is 3ft ...
4
votes
3answers
1k views

What could cause the water from melting snow off a roof to be yellow?

I noticed today that there is a nice long yellow line of snow below my eaves. It stretches for several yards, and seems to have been caused by the melt coming from our roof. Aside from thousands of ...
4
votes
3answers
90 views

Ok to roof-over in the rain?

A buddy and I will be installing a second layer of composite shingles over the old ones already on my roof. Should we consider doing any of this in the rain?
4
votes
2answers
426 views

Are torch-on-roofs the best solution for a low pitched roof?

I have a low pitched metal roof and it is leaking. The roofer I spoke with says to stop the leaks they need to tear the metal off, put down plywood, and use a torch-on-roof system of roofing. He said ...
3
votes
3answers
679 views

Small amounts of moss on asphalt shingles?

What's the best way to remove moss from asphalt shingles?
3
votes
1answer
3k views

Can I use roofing nails to attach OSB/plywood to studs?

My roofing nails are for nailing asphalt shingles to roof underlay boards. I have been using 2.5 inch nails to nail external wall OSBs to the studs. I have been contemplating using the excess roofing ...
3
votes
3answers
7k 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?
3
votes
1answer
166 views

How can I achieve a randomized cedar shake shingle placement?

Other than the obvious (just eyeballing as you go, shingle by shingle), what is a good way to achieve a random-looking shingle placement on a cedar shake roof? (This particular project happens to be a ...
3
votes
1answer
272 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 ...
3
votes
1answer
640 views

How much sag on a roof is acceptable?

I have minor sagging of my roof plywood, 3/8" thick, placed on trusses 24" apart. Is there an amount of sag that is technically okay? I could not find anything on the APA website. I am not worried ...
3
votes
1answer
578 views

What do I need to do to finish a roof with exposed rafters on a shed

I have a shed as pictured that had never been finished completely. As such the shed has a lot of dust debris, etc getting in that should not be. What do I need to do to finish the shed. Should I be ...
3
votes
1answer
397 views

Roof Showing Some Dipping

I recently walked my roof. There are some low spots, like little depressions. What causes this and should I be concerned? It seems that the plywood underneath is good but it seems like the ...
2
votes
2answers
2k views

Ways to Safely Repair 45 Degree Pitched Roof without Jacks?

What methods can a person use to safely repair a roof that is slanted at a 45 degree (or greater) angle without using Roof Jacks? Is there anyway it is possible for a person to safely walk on such a ...
2
votes
1answer
127 views

How do I install roofing material on a roof with a ridge vent?

I am helping a friend repair his roof; his roof has a roof vent at the peak of the roof. I've done a few roofs, but never with a roof vent. So any help in how you roof with a roof vent? I assume ...
2
votes
2answers
63 views

Lift existing roof frame to replace top logs in log home

We have a log house with a 12/12 pitch roof. This summer we're planning to take off all the old asbestos tiles and leave the existing roundwood framing and put in new tiles of some kind, or metal ...
2
votes
2answers
166 views

What should I do if I'm unsatisfied with my recent roof replacement?

I had my roof replaced this past summer . The old roof was torn off and new insulation and a whole new roof. It is a flat roof, new plywood and two layer torch on, on a 12x60 mobile home . The roof ...
2
votes
3answers
5k views

How should I insulate a bedroom in the attic?

After doing lots of research and reading lots of different opinions I would like to know what is the best way to insulate and vent a 1 1/2 story house that has a bedroom upstairs in the roof/attic ...
2
votes
1answer
135 views

Should I replace my roof myself?

I have just bought a house from the 40s. It is an Art Deco style place that used to have a flat roof but has had a pitched iron roof added some time in the 60s. One of the conditions of sale from the ...
2
votes
1answer
205 views

How can I tell whether this roofing material is hazardous to tear down?

I've got this little building in my garden that needs to be completely removed to make room for building a real house. To keep costs down, I'll be doing most of the tear-down myself but I'm unsure ...
2
votes
1answer
45 views

Should a roof drip edge be placed above or below roofing felt?

I'm confused... I've seen two conflicting sources of information describing how a roof drip edge should be installed. One source (Ask This Old House), states that a drip edge should be placed above ...
2
votes
1answer
245 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 ...
2
votes
2answers
183 views

How do I improve the insulation in a vaulted ceiling?

I live in a twenty year old Florida condo quadplex. The upstairs ceilings are two by four trusses of a mansard roof. I have replaced the ac, wall insulation, ducts. An IR thermometer shows huge heat ...
2
votes
0answers
344 views

Can Rhino lining be used for a residential roof?

Is Rhino® lining a viable option for a residential roof? I know for many people it is cost prohibitive, are there any regulations concerning polyurethane coatings on a roof? Has this been done before? ...
1
vote
1answer
85 views

When should I consider using Plastic Round Cap Roofing Nails?

I'm getting ready to shingle a roof for a shed/outdoor office and I'm confused on if/when I should use plastic round cap roofing nails: I haven't seen these used in any instructions (including the ...
1
vote
1answer
69 views

Should roofing nails be visible in the attic?

I have a colonial built in 1913 and I live in NYS. My roof was just completed today and I have exposed nails across the entire roof! It was not like this before. When I asked the contractor about ...
1
vote
3answers
17k views

How do I finish a ridge cap?

I've installed the ridge cap, using modified 3 tab shingles. I've installed the ridge cap all the way to the other end of the ridge, but I'm not quite sure what to do now. The next shingle will ...
1
vote
1answer
807 views

How do I tie a new roof in to an existing roof with a pitch transition?

I added a room to the side of my house, and the new roof goes onto the existing roof. I am almost done roofing it. The image below depicts the current status. I put roofing felt down under the two ...
1
vote
1answer
250 views

Free standing shed with single plane roof

My shed/summerhouse build will be around 3m by 4m give or take. if I build it with a single plane roof, or shed roof. Will this put considerable load on the lower wall holding up the roof. The shed ...
1
vote
2answers
62k 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
1answer
47 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 ...