Questions tagged [roof]

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
40 views

What coating to put on a flat roof so that it can be walked upon?

The house we've bought has an two-storey outbuilding. The access to the second storey is some steps up the outside and then a 5 x 1 meter walkway along the back, with a door half way along it. That ...
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3answers
3k views

What is this fence-like feature on colonial roofs?

I've seen this feature from time to time on both commercial and residential buildings exhibiting some form of colonial-style architecture. It's essentially a fence on top of a roof. Does this feature ...
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1answer
37 views

Roof coatings from Home Depot

Here is my summer vacation project: I want to redo an old garage roof by replacing the old tongue and groove boards with sheets of regular plywood (not marine grade) but I do not want to re-shingle. ...
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1answer
39 views

Is it worth adding a 2nd roof vent to an unfinished detached garage?

If a "2.5" car (24x24ft) garage has one roof vent near the top, is there any use in adding an extra roof rent? The garage is unfinished/uninsulated, and there is no obstruction of air between the roof ...
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2answers
59 views

Can you screw roof metal directly to OSB between rafters?

I'm building a 14x16 tiny house and doing a metal roof. It's a slanted/skillion roof and the rafters are running down from the tall end to the lower end on 16" centers with no cross braces. I'm ...
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3answers
87 views

Using joist hangers to support a lean-to/skillion roof?

I'm in the process of building a 14x16 tiny house with a lean-to/skillion slanted roof. I have the walls built, front wall is 12', back wall is 8'. I'm doing things a little different because I don't ...
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1answer
65 views

Do I need to remove cap nails before re-roofing?

If I have existing decking with old tar paper that I want to remove the tar paper and install synthetic underlayment, do I need to remove all existing cap nails in addition to the tar paper or can I ...
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2answers
74 views

Replacing ceiling joists with rafter ties higher up on the rafters

I'm trying to help my grandfather plan for a remodel of his 1950s home. The original structure is 24x24' with 6" rafters spaced about 20" apart on a 6/12 roof. He'd like to be able to have a "vaulted ...
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0answers
64 views

How to Design an Octagonal Cabin

I asked this one earlier but it was closed for some reason, even though I was NOT asking for a product or service recommendation, but creative solutions. I wanted ideas for building an octagonal ...
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2answers
70 views

How to address a slow garage roof leak

During a recent rain storm, I noticed a very slow drip of water coming from the center of my (external) garage roof in a few places. After it dried up, I went to inspect the problem spots and found ...
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1answer
45 views

Are cap staples eventually visible under asphalt roof shingles?

I am going to replace the roof on my barn using synthetic underlayment and asphalt shingles. I plan to use 1" cap staples on the underlayment as the manufacturer suggests. My question is: Once the ...
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0answers
44 views

What are Safe Allowances for Drilling into Rafters?

I plan to drill a hole for a screw into one of my (oversized) rafters near its bottom end where it meets the wall, into the narrow face pointing in towards the house. It will hold a negligible amount ...
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2answers
157 views

What can I do to make my galvanized steel shed stronger?

Here are my specs so far for the shed I am getting made. I plan to use it as a shed for my very large tools. It is 40 ft × 24 ft, with 11 ft high walls. It is made from galvanized steel while the ...
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1answer
41 views

How to fix split open roof

Recent winds in the UK had blown the roof off my shed. It look like it has opened from the beam. I have claim insurance on it but for the time being I had put carpet on the roof but it keeps blowing ...
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1answer
37 views

Alternatives to bituminous membranes for concrete roof?

This new question is related to this old question I had previously asked, but from another point-of-view. I have a 13ft x 13ft rooftop made from plain concrete. It's leaking a bit, so I have to do ...
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1answer
64 views

Roof Rafter/Beam Joint pulling apart and sagging

There is a joint in my attic where 4 beams or rafters meet. Someone used a 2x4 to support one of the beams, but it did not work because the beam was in two sections.As you can see in the pictures, ...
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0answers
43 views

Advice for improving structural integrity of enclosed porch

I've recently purchased a home. Home inspector said nothing about the back porch. As I watch more youtube videos on framing and general home improvement, I look at my enclosed porch and think there ...
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1answer
20 views

standing seam metal roof: length of the clip-strip fastener

What is the usual length of the fastener that holds the clip-strip to the decking for a standing seam metal roof?
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2answers
75 views

Only apply primer to concrete roof?

Our building has decided to paint a 13-ft x 13-ft section of the roof that's leaking (just a few drops with lots of rain). This roof has a fence since it's an "outdoor" area that we all share, so it's ...
2
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0answers
49 views

Roof Replacement Done Wrong?

Id appreciate any opinions. Just had a new roof put on. Looks worse than the old. Please see the picture. 3 areas of concern. It was put on in cold weather so that may explain the shingles, but the ...
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1answer
41 views

How does an end notch in a ceiling beam affect deflection calculations?

We have a ceiling beam that is a standard 4x8 over 12 feet. Let's stipulate that is properly sized for the weight load over that span. But, what if, in order to place that beam, we need to notch it ...
2
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1answer
66 views

In what order should I install roofing, gutters, and attic insulation?

I have an old ranch built in the 50's. It needs a new roof, insulation (currently no insulation) in the attic, and new gutters. It's almost impossible to find a good contractor that does it all. ...
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5answers
3k views

When should an asphalt shingle roof be replaced?

My shingle roof is 21 years old. However, it still looks good. My roof has aged well. Should I play it safe and just arbitrarily replace the roof based on time? Or, is it safe to hold off a few ...
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2answers
75 views

How can I prevent rain from dripping off the roof rake edge?

Recently I have noticed that about 1-2’ from where the roof would drain into the gutter, water is dripping over the edge of the house on the side. What would cause that to happen? Nowhere else around ...
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1answer
29 views

Sealing coarse concrete rooftop?

I live in an apartment and I would like to seal a section of our rooftop with small leaks where water puddles (depth of puddle is negligible). The rooftop is "rough" concrete in the sense that it ...
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3answers
83 views

Should I Add More Static Vents On My Roof

I wanted to add insulation to an old ranch house. However, the insulation contractor wants to add static vents (2 turtles and 2 pipes). He says I don't have enough ventilation in my attic. The roof ...
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1answer
31 views

How to know when an asphalt shingle roof needs to be replaced?

Is there a way to inspect a roof to know whether the asphalt shingles need to be replaced?
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1answer
42 views

How to fix chimney hole in roof?

I've starting insulating the roof and that got me looking at the "old" hole where a (useless) chimney used to be. That chimney got removed for a solar panel setup. As I'm insulating, this needs to be ...
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3answers
129 views

Water dripping from soffit - problem with the gutter, roof, or something else?

We recently bought a house that has gutter guards installed. I noticed during heavy rain storms, water drips from the front of parts of the gutters, and ends up dripping onto the porch underneath as ...
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1answer
27 views

Shortening Roof Rafters for Flat Roof Addition

I'm in the early stages of planning an addition which will involve extending a flat roof out from a sloped roof. Are there reference sources/videos/etc out there discussing approaches to shortening ...
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2answers
237 views

Is it possible to get a accurate assessment of a roof without ripping it off?

I just bought a house, and knew it needed a new roof because of its age. I had a roofing company come out and inspect it. The inspector spent a couple of hours standing on the roof and going through ...
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0answers
23 views

How to remove old RV roofing tar?

In past years we used this elastomeric silver roof coating on a roof. I need to remove that to repair the underlying roof. How best to remove it? I haven't found any method that isn't tedious and ...
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2answers
56 views

Should I modify the end trusses to accomodate a gable vent?

I am currently building a detached, single car garage and getting ready to sheath the roof. I had originally specified a ridge vent but am strongly considering switching to a gable vent. I have some ...
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1answer
47 views

Old or new water damage on roof interior

I’ve been in this (100-year old) house 3 years, and this area of the roof has always had marks of past water damage. I looked at it more closely today as we’ve been having a lot of melting and ...
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1answer
63 views

Screw for concrete roof

I am installing some solar panels that measure 41" x 27" on my concrete flat roof using slotted angle bars. What type of of screws (as well as wish and length) would be best to attach to the roof and ...
2
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4answers
128 views

How to overwinter a roof during construction?

I am building a new detached garage, and the forecast this weekend is just warm enough that I plan to get my trusses and roof sheathing up. My sheathing is 5/8" plywood (not OSB). It's a single car ...
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1answer
56 views

Chimney still leaking despite reflashing and coating

My chimney was leaking and the contractor pulled apart the roof around it and reput it with proper sealing and coating. Then he also coated the entire chimney with Geocel siliconized seal which is ...
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1answer
52 views

How can I fix this leaky roof over a covered open air porch?

There is a small deck above this covered porch. The first picture shows right below that deck where there is small shingled roof. Below this roof is a covered but open to the air porch. When the snow ...
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1answer
27 views

Fix attached laundry room roof framing

I have a laundry room attached to the back of the house (was done by previous owner). Recently I found a leak (due to some nail wrongly on the shingle exposed). But then when I "uncover" below the ...
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1answer
48 views

2x6 span as rafter for shed with tin-roof

I'm building a goat shed - total size is 16' x 24'. The tin roof (lean-to) will run the 16' length. Can I use a 2x6 for the rafters? Could go 16 or 24" OC. Thanks. Update from responses: roof is 1/8 ...
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1answer
70 views

How to terminate cooker hood ducting

I have a probably stupid question about assembling ventilation pipe for a cooker hood. I want to vent my cooker hood through the eaves rather than go through the roof as I suspect it's cheaper, less ...
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0answers
24 views

Roof Flashing inside corner

I'm building a structure and putting a roof on it. The roof is single slope 3x12 pitch. Basically it's rectangle platform except where in the middle of the lower edge the roof extends 2 more feet so ...
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1answer
46 views

Galvanized 5V Crimp roofing screw placement with battens/counterbattens

I am installing 5V crimp roofing over an addition to my small house. The additions's roof joins the house under a 14" eave. The main house slope is 5/12 or about 22.5 deg. The addition slope is 10 deg....
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0answers
32 views

Long clout nails though rigid insulation boards

We are building a cabin with a solid wooden roof (18mm) on which shingles are nailed. An advised method of insulation is to put rigid insulation board on top, then nail the shingles using long clout ...
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8answers
12k views

Should plywood be missing on my roof?

I live in Canada and I just had my roof done on my house. I recently went in my attic and found out that some part of the roof is missing plywood :( In the following picture, there is no nails ...
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0answers
28 views

What's the best way to protect plastic drain waste vent pipes from UV damage on a roof?

What is the best way to protect plastic plumbing waste vents (DWV) where they extend above the roof? PVC discolors and gets brittle in the sun, solid ABS gets chalky, foam cellular core ABS bends ...
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2answers
38 views

How can I replace missing parapet wall “joint caps”?

My home has a fiberglass roof deck with parapet wall surrounding it. The parapet wall is covered in aluminum (at least I think its aluminum) that matches the vinyl siding and color of the fiberglass ...
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0answers
38 views

How to fill in an incompletely filled in downspout on built up flat roof

I notice that water pools up over a mostly filled in downspout fairly often on my built up roof. The downspout goes maybe 3-4 inches deep before I hit a rough and very hard rubbery surface (I can't ...
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5answers
173 views

Power cable loose on roof OK?

I would like to mount a floodlight on my chimney. I'm not keen on cutting into the roof there to make an entrance for the wire. Every hole in the roof is an opportunity for water intrusion and it's ...
3
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1answer
41 views

Fixing water ingress at mitred corner in roof fascia

Apologies in advance for the long question - I wanted to include all the details as I am rather unsure of what I am doing! I have a 10-year-old flat roof with a fascia facing the predominant weather. ...

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