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.

147 questions with no upvoted or accepted answers
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613 views

Was my home's dormer flashing installed incorrectly?

I've lived in this home for two years now. Roof is probably at least 10-15 years old, perhaps 20 years. We started noticing some water stains on the ceiling soon after moving in. On a closer look, it ...
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3answers
249 views

What is this roof constructed from?

I am trying to answer questions about the construction of a roof and was wondering if it is possible to tell from the picture attached, and if so what the construction is? EDIT: The roof is difficult ...
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1answer
4k views

Getting R38 in roof with 2x8 rafters

I was planning to use foil faced 2" polyiso plus an air gap, plus 5 1/2 rock wool, to get 13+3+23, or r39. But this is all between the rafters below the roof deck, and the polyiso is impermeable. If ...
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0answers
62 views

How to get roof access via Anderson Venting Roof Window

I have an Anderson Venting Roof Window in my attic that I'd like to get through for some roof access. I believe it is an RV model, as seen on pg 11 of this Anderson parts catalog I've removed the ...
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0answers
73 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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0answers
44 views

What needs to be replaced for correct eaves / roof edge?

The last homeowner installed a patio roof - connecting support beams to the roof structure. It was a very flat roof -- that had lots of problems. I'd repaired it on multiple occasions - however, ...
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0answers
92 views

Proper shingle placement in corner

I had my roof replaced about a month ago and recently noticed that when it rains, a strong stream of water pours from the roof onto an adjacent window in the corner. In this problem area, I have one ...
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0answers
36 views

12" custom flashing for roof?

We have a section of our garage that sticks out about 12" from the rest of the house and is flat on top- you can see it in the orange section in this photo. The green and blue sections are a boral ...
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0answers
269 views

Ledger/ribbon framing load capacity

We are considering adding a deck to the top of our flat roof detached garage, if the necessary work involved is reasonable. The garage is 20' deep x 28' wide separated into 3 bays, the widest of ...
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0answers
115 views

Rear of house has no eves; how do I ventilate and prevent ice dams?

My home is in St. Louis and it just doesn't stay very warm. I am finding that the heat kicks on a lot just so it can keep up. The house is a ranch on a slab, built in 1960, 1073 square feet. In 2015 ...
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62 views

Is this an appropriate roof setup

I am creating a standard A frame roof (4.5:12 or 5:12 pitch) for my shed using rafters and a ridge board. The ridge board is 2x8 and is spanning 14 feet for the length of the shed (12x14). I am using ...
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82 views

How much garage ventilation is necessary?

The Background I have a 2-car, attached garage with additional shop space. The garage area is roughly 19x21 while the shop space is roughly 12x27 for a total of ~725 sq ft. See the very not to scale ...
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2answers
2k views

Proper window header for 6-foot window & understanding the span tables?

I'm framing out headers for 6' (72 inch) wide windows in a sunroom. The sunroom is around 12 x 12 and has a ceiling and roof. Based on my current understanding of the header span tables which I have ...
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34 views

EPDM roof edging trim

I've laid an EPDM roof on my shed/workshop, and I've now got to trim the edging, using wooden battens - what I'm not sure of is whether to put them on the edge, or underneath: Most of the pictures I ...
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1answer
330 views

Condensation forming on garage roof despite insulation

I have a condensation problem on the inside of my garage roof. I noticed it in November, lots of condensation forming on the roof but only at the back half of the garage which is slowly being ...
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2answers
63 views

Will a new vent resolve pressure evacuation of my drain traps?

We've recently moved into an old house. We changed part of the soil pipe in the basement, which actually makes the flow more straight-forward/unobstructed. I've marked this in the attached diagram. ...
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0answers
60 views

Delaminating roof sheathing in attic

I recently had my roof replaced. The roofer recommended that we also replace the sheathing so we did. As they were installing the sheathing I expressed concern that the sheathing had small strips ...
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0answers
224 views

How can I install gutters where there is no roof overhang, and the walls are concrete block?

I have a detached garage that has a flat rubber roof that slopes from front to back. There is however no overhang at the back of the garage, and no gutters, so water is running down the concrete block ...
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0answers
65 views

Gutter brackets screwed through shingles

I had a new roof and gutters installed last year, and while cleaning the gutters I noticed that while most of them are attached like the following picture there are a few that are attached by ...
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0answers
415 views

Gutter installation on fascia with or without 1x2 wood drip edge

I have a similar situation to this post (What is this small strip of wood in front of fascia?) with a 1x2" presumably serving as a drip edge along the fascia. In some areas along the eaves this 1x2 ...
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0answers
33 views

Whats the best way to seal a new garage roof to another existing garage roof?

I've just raised my garage roof from just below to 150mm above the adjoining garage of my neighbour. Their felt roof used to flap down onto my roof but now I need to direct this felt flap up to my - ...
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33 views

DIY Solarium / Four Seasons Room - Project Planning Advice

I am located in Columbus, Ohio. I currently rent, but I am planning on buying a house in the next two years, and I want to get started on planning for this project. My wife is a houseplant enthusiast, ...
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0answers
249 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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0answers
112 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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0answers
93 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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0answers
100 views

Patch a leaking flat roof

We have a flat roof (very low slope) made from gravel and tar, it's a little roof over the porch of the house. When it's raining, the water leaks under the soffit on the right corner, where is the ...
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1answer
1k views

Rafter load capacity

I have a 1929 craftsman house with dimensional 2x4 rafters on 24" centers. They're about 13.5 ft long, spanning 11.5 ft each (measured horizontally, wall to ridge beam) at a 7:12 pitch. About 25% of ...
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0answers
98 views

How to Approach Fixing a Roof Leak When Drywall is Rotted Out?

My parents house has a leak in the roof that hasn't been takan care of for a few years and has pretty much destroyed the drywall in the affected region. What strategy should I use to repair the leak? ...
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0answers
55 views

Insulating townhouse's attic sidewall?

Last winter, I've had some issues with ice dams on my roof. I live in a townhouse in Southern Quebec, Canada, in the middle unit, where lately temperatures during the winter can go anywhere between -...
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0answers
539 views

What is this brown sticky stuff on my soffits?

I recently had my roof replaced and some brown patches started appearing under some of the new plywood. It appears to be dry to the touch, although there are some beads of similarly colored goo on the ...
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86 views

Building Rafters for OutBuilding

I am going to be constructing an outbuilding for livestock. It will be 32 ft. x 32 ft. I plan to use rafters instead of trusses. Is it OK to use 2x6's with 48 in. OC for the rafters at a 3/12 pitch? I ...
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0answers
27 views

Upgrade Rooftop HVAC

I am planning a rooftop HVAC upgrade. My current HVAC frame (leg) has cracked one of the 2 x 6 roof rafters that I have repaired with wood glue and anchor screws, so it is good now, but it served as a ...
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0answers
631 views

Why is this dormer flashing causing a leak?

This roof was repaired about 6 years ago and is now slowly leaking when there is a heavy downpour. The leak is located close to the center point in between the outer wall and the dormer. It is ...
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0answers
52 views

Woodboring insects in roof

I have a roof built relatively recently over a concrete slab. It's a reinforced concrete frame and this is how things are normally done. The roof done with pine wood and then has it has concrete ...
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0answers
248 views

How to fix a flashing roof leak?

I have a roof leak. Based on the images below I think it is in the flashing above a small overhang. Please speak up if you don't think that's correct. Can anyone provide some guidance on what to ...
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0answers
258 views

How to redirect water pooling behind skylights

I have a pair of skylights in my roof that leak every time it rains. I've tried silicone and a roofing sealant along the edges.. still leaks. During the last storm heavy rain I went up to check it out ...
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0answers
42 views

galvanic corrosion with anchor point on galvalume roofing

I'm going to add some sort of anchor point, for attaching a safety rope, to my galvalume roof (some sort of shoulder eye bolt, but that is a different discussion). My question, what metal is best ...
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0answers
65 views

How to determine source of this roof leak?

As Irma pounds our house I was in the attic and noticed we have a roof leak but I can't figure exactly where it is coming from. The obvious place is where that exhaust vent is penetrating, but it is ...
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0answers
60 views

What type of mortar should I use to repair a flat flagstone roof?

My garage has a flat flagstone roof. It is around 100 yrs old and is leaking. There are some cracks in the mortar. What kind of concrete mortar mix should I use to stop water from seeping through?
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0answers
1k views

calculating waste factor for hip roof w/ valley using cedar shakes

I've been told that my hip roof would result in a whopping 30% waste factor with cedar shakes, that three additional squares of shakes are needed above the amount required to cover the raw square ...
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0answers
51 views

Stucco repair, no membrane?

I was doing a crack repair on my grandparents' house. The crack was in stucco located in an outside soffit on the 1st floor. I removed the stucco and to my surprise there was no membrane, just what ...
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0answers
98 views

Protecting metal shed from rain

My parents brought a large (6*40)metal storage container many years ago. They live in warm weather ( San Diego) but it does rain on occasion on the container leaked. My dad and brother tried numerous ...
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0answers
3k views

Bathroom exhaust fan through clay tile roof

I've installed an exhaust fan in an upstairs bathroom and need to vent it through the clay tile roof. (pic attached) The standard 4" pipe jacks and flashings I'm finding at Home Depot don't seem to ...
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0answers
783 views

Split vertical studs need replacement or reinforcement

About a dozen of the short, vertical studs that support my roof rafters are split along as can be seen in the picture. There seems to be some minor horizontal displacement as well. Obviously they ...
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0answers
172 views

Replacing attic insulation

I'm trying to figure out the best plan to replace the failed insulation in my attic. It's a 1.5 story house so it's really a combination floor/attic (see attached diagram). The original insulation ...
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0answers
77 views

How to add/retrofit birdstop to tile roof without removing tiles?

Is it possible to add "birdstop" to the edges of a Spanish tile roof without having to take the tiles off? Is there something on the market that can be screwed to the facia?
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0answers
2k views

DIY Camper, framing advice needed

So my little teardrop trailer plans have changed into a 12'x6' camper so that I can stand in it. I'm in the planning phase still. What I'm doing for the walls is 3 layers; an outer 1/2" board, a ...
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0answers
356 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
143 views

White substance on roof timbers

I've just inherited my dad's house and I've been looking over it's condition, and one of the walls was getting damp when it rains, I had a look in the loft and saw the following: Is this dry rot? It'...
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0answers
3k 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 ...