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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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Is there any reference (or probably web/online calculator) to figure the size for downspout pipe for a known flow rate

The total flow rate of water collected by the gutter of my roof is known (50 L/minute). I need to figure the safe size for my downspout pipe for this roof. What's the minimum diameter for the ...
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2answers
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Storm-chasing contractors and insurance claims

This is the year we planned to replace our roof. When we bought the house five years ago, the home inspector told us that it was coming up on being due, so it was the next big thing on our list after ...
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1answer
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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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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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44 views

Can I approximate flow rate of a roof with known flow rate of another roof?

My main building roof I need to know the flow rate (FR, for example Litre per minute) of water coming out from the gutter of this roof. The easiest way would be catching the flowing water coming out ...
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3answers
96 views

Making a ridge for a tile roof - Any cheap way?

I'm making a shed, with a roof made of cement tiles. I'm trying to be as cheap as possible, but still making it as nice as I can. Most materials are salvaged from here or there, or bought second-hand. ...
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563 views

My rubber roof has developed a leak. Can it be fixed?

Anyone out there who could give me some advice please? I've got a rubber roof and it has developed a leak. It is small, yet fairly centralised. Can it be repaired, or have I got to replace the whole ...
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1answer
30 views

Adding (small) load to existing rafters with 2x4

I am planning on installing a whole house fan (shown in the image below). The fan has a total system weight of 40 pounds and needs to be supported via metal and nylon straps to a beam as shown in the ...
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Temporary deck roof support

I was wondering since I was cutting down trees on my property, can I use them to temporarily support the roof on my deck while I change out mobile homes?
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1answer
27 views

Fixing separated soffit?

We got a new roof last summer and I have recently noticed that our soffit has some gaps. The edge is a bigger gap and it extends about 10ft down the roof line until it is back to normal. I assume just ...
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25 views

Roof drains overflowing after torch-on roof

About 8 years ago we had our tar & gravel roof replaced by a torch-on system.Since then, and for a few years, after just about every rain resulted in a plugging of the drain apertures on the roof, ...
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1answer
50 views

Replace Attic Fan Without Going on the Roof

I'm attempting to replace the motor of my attic fan. I've disconnected everything else, but I noticed after I removed the nuts on the support bars that I can't pull the fan and motor through the ...
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1answer
62 views

Too much water…coming into my downspout

I live in a Townhouse...I'm second in of 4 Units...I'm at the second to highest level and then the unit beside me is higher again. I'm the only unit with a downspout in the backyard...we have ...
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42 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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1answer
24 views

How should location on roof be flashed or sealed?

During hurricane Florence we had significant water get into our house from the roof. There is a location in our roof (see pic) where from inside in the attic I am able to stick a toothbrush through ...
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2answers
26 views

What type of exhaust ventilation is best for attic?

We want to add exhaust ventilation to our attic (hip-style composition roof). Which type is most effective, passive or power?
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21 views

Can a bathroom fan go out a ridge vent, and how functional is this temporary fix?

I'm in a 1 story craftsman house and have a bathroom vent that had no ductwork, just pouring wet air into the attic. The vent also didn't work well to begin with so we never used it and thankfully ...
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43 views

What Type of Roof is This?

I'm trying to figure out what the name is for the roof structure my home has - it's a single level late 70s ranch, side-gabled, but the roof is broken up into multiple segments. Is there a name for a ...
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4answers
61 views

How can I waterproof this weak spot in my roof tile where pipe goes through it?

This copper pipe goes in between 2 roof tiles (cement/hard tiles). Water constantly leaks through when it rains. The water clings to the pipe and then drips onto the ceiling. As you can see from the ...
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2answers
95 views

How much stronger is a triangle-shaped vs. A-shaped truss? Max snow load comparison?

I'm on a property in which there is a garden shed and its roof collapsed yesterday because of heavier than normal snow that accumulated on it over the past few months and it looks like yesterday was ...
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2answers
87 views

What is this small strip of wood in front of fascia?

I am trying to figure out what this small strip of wood at the top of my fascia boards is called. Also, what type of wood would be good to use to replace it? Cedar?
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2answers
71 views

Cape Cod Insulation/Snow Melt [closed]

Is the melting pattern on this roof a sign of really poor insulation in the knee walls? Thinking about purchasing, but I don't want to spend my life fighting a poorly designed/insulated house if it's ...
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2answers
34 views

Will a galvanized tin roof act as a ground for a magnetic rooftop antenna

I just installed a magnetic based antenna on my galvanized tin porch roof. Will the metal roof act as a ground for the antenna? I am unable to attach a ground block to the antenna cable, because the ...
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1answer
78 views

Can Vent Flashing Nails Be Exposed On The Roof?

I am buying a home and as part of the contract we asked for a number of fixes by a certified contractor. For this fix, securing the loose flashing, the home owner said his friend was a contractor so ...
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1answer
4k views

What is this large pipe coming out of my roof?

I've looked at the other "What pipe is this?" questions, and none of them that I've found seem to match... I don't know what the large metal pipe is (on the right side). Can anyone identify what it's ...
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1answer
116 views

Why are hanging icicles on my home yellow?

The icicles hanging on the front of my house are yellow on the tips. I also noticed a yellow line in the snow beneath the icicles. We moved into this home recently and I know they had the roof ...
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1answer
37 views

Q. Should I be able to push up shingles on edge of new roof?

Just had my roof replaced with architectural shingles. Should I be concerned that I can push up the portion of the shingles over hanging the roof edge by about an inch?
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32 views

Our top floor is finished/heated. How to prevent ice dams?

I'm in snowy Minneapolis, living in a 3-story house built in 1886. The top floor is fully-finished and heated, and there's no attic. We've been getting crazy ice dams this year, but not previous ...
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2answers
37 views

hot spot on new roof

I had a new roof put on last fall. I never noticed any hot spots on my roof until this winter. I had an inspection after the roof was put on and I was told my insulation looks okay. When they put ...
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2answers
73 views

Should felt paper overhang an eave drip edge?

I am replacing my roof shingles and I would like to know if there is a preferred dimension for roofing felt overhang on drip edges.
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2answers
193 views

Vaulting ceiling and removing ceiling joists without risking the integrity of my roof system?

I have a large space without walls and when I looked in the attic, it seems like there is a possibility to vault my ceiling. Checking if anyone here could help me to figure it out. What are my options ...
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1answer
33 views

Stalling roof turbines to improve air flow?

My landlord claims that roof turbine ventilators move more air when they do not spin—e.g. by stalling it using a piece of wire tied through the vent and the brace. His reasoning, roughly, is that when ...
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1answer
40 views

Roof Ridge Venting - When in 2012 did roof venting become required instead of standard roofing codes?

In what month of 2012 did roof ridge vents become code, as opposed to standard roofing when roof ridge venting was not a requirement? I ask because I need to present as evidence to the BBB (Better ...
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2answers
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Diagnosing a leaky metal roof

We purchased a 60 year old house a year ago, and the builders report suggested no issues. The main roof of the house is tile over wooden rafters, and the attic space is dry. There is an extension, ...
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Adding Collar Ties as Chase in 1930 Tudor

I'm planning out how to insulate and finish my attic without compromising ventilation. I'm zone 7, with a large, entirely floored attic. Roof is hard slate, original to 1930-built home. No current ...
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1answer
44 views

Flashing and/or sealing for vent through built-up roof (BUR)?

I'm reconfiguring plumbing and need to poke a new vent through the roof of my Chicago two-flat. It's a built-up roof of tar, felt, etc., with a slight grade. How to finish the roof portion so that ...
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1answer
49 views

Rafter tie sizing

Just bought a house in Ohio and the rafter ties in the garage are in pretty bad shape. Looks like the previous owner store a lot of heavy items on them and they are sagging and bowed. The garage is ...
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1answer
28 views

Should I insulate a metal pipe roof vent to stop condensation?

I recently bought a home which was a renovation. I had a water leak from the ceiling in an upstairs room. Upon opening up the drywall, I noticed there was what appears to be a vent of some sort that ...
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32 views

Tile roof has water running under tiles

recent rains revealed a problem on our portico roof--instead of running into the gutters, the water drips down the column and in front of the gutters! So, I went up there and discovered puzzling ...
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2answers
150 views

Does this truss have two or three bearing points?

Part of my roof is made from studio trusses as shown in the picture. I'm trying to determine if any of the load from these trusses is borne by the highlighted wall. The wall is built with 2x6s, but ...
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1answer
47 views

How to measure 1/4" per 1' slope for rainwater drainage for a flat roof

During the last big rain here in AZ, I noticed a significant amount of ponding in the newly renovated areas of our roof. I first noticed the sitting water while it was still raining and about 2 days ...
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1answer
42 views

How to prevent water coming off non-gutter edge of roof?

On the side of our house that is perpendicular to the main roof ridge the roof (the ladders?) extends further by the ridge than it does down by the eaves. As a result, rain that hits close to the end ...
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1answer
41 views

Ceiling insulation question

I live in a 2 story city row house in Philadelphia that is over 100 years old with a flat roof. The space between the second floor ceiling and roof grades down from the front to back - 36 inches or ...
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1answer
31 views

powerwash cedar shake roof

I have a 13 year old cedar shake roof. I send someone from a roofing company twice a year to do maintenance and cleaning of the roof.That person has told me that some of the shakes have started to ...
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1answer
115 views

How to fix cracked roof joist?

I cut open my ceiling drywall to take a peek in my "attic" (about 20" of vertical space) before I go about having a skylight installed. I have a flat roof and I noticed one of the rafter/joists is ...
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2answers
73 views

What is the term for a gambrel roof with an extra angle on each side?

What is the this roof style? Can it even be done with timber! Its not Mansard or Gambrel. Though similar to Gambrel notice the extra pitch. Any pictures, design, sketches of where this has been ...
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1answer
81 views

Carport Roof - Ridge Beam/Board vs Gussets

I am building a 20' X 24' carport and was trying to decide if a ridge beam / board was necessary, or could i simply use gussets to connect the roof rafters. I'd like to avoid using a 24' beam if ...
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1answer
138 views

Split/broken rafters a concern?

I'm buying a home and had a building inspection yesterday. The only major defect the inspector found was two split/broken rafters inside the roof. Can anyone tell me if these are a major conern? ...
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1answer
38 views

Repair Leaking Roof/Chimney In Winter

I live in an 100 year old house in Michigan. I have suspicions that the flashing around my chimney is leaking as the plaster in the ceiling directly below the chimney & roof point is getting soft ...
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2answers
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Flashing around chimney and gap

Have been investigating leak on my 3 season room. Not certain it is related to this finding but discovered flashing around my chimney in an interesting state. Big gap in corner and also the epoxy/...