12 votes

How can I locate and repair a leak on a flat roof?

Clearly this has been a problem for a while and also the standing water and patch job on the flat section of the roof is to blame. There is no real shortcut here, as you can see, so the solution is to ...
jwh20's user avatar
  • 23.2k
5 votes

What is the correct way to seal/flash coolant lines through siding?

Depends on where the indoor unit is that he had to connect to, in comparison of where the other were in your neighbors house. The important thing is, the tech did slope the pipe down and out of the ...
Jack's user avatar
  • 34.8k
5 votes

How can I locate and repair a leak on a flat roof?

Your problem is going to be finding where the leak is coming from. I have found leaks that came in more than 10’ from the entry point. The water can travel under the rolled roofing and drip down at a ...
Ed Beal's user avatar
  • 103k
4 votes

What could cause flashing LED lights when other LED lights in a different room are turned on?

Some LEDs with switching power supplies demand power in pulses, which can get coupled back onto the power line as small surges. If you have bulbs which are making that demand at different frequencies, ...
keshlam's user avatar
  • 28.7k
4 votes

How to prevent blinking LED on a three way Lighted switch circuit with only one light fixture?

For a newer solution, many dimmable LED should work. The little current that is flowing will not light the dimmable LED bulb. Many thanks for the previous Q & A, I would not have thought to try ...
Thomas McKinley's user avatar
4 votes
Accepted

Can Vent Flashing Nails Be Exposed On The Roof?

They probably should be dabbed with roofing cement, but they tend to self-seal to some extent. It's unlikely that they'd leak significantly. Also concerning is the fact that raw steel nails were ...
isherwood's user avatar
  • 135k
4 votes

Replacing rotted out window sill in basement block wall

Think about replacing the sill and the casing with some of the PVC or composition boards that are available in the home stores. Any wood you put down there will be rotten again in 5 years.
JACK's user avatar
  • 79.9k
4 votes
Accepted

Can this roof flashing membrane be glued back down?

It probably is rubber and you can try to glue it back up, but I doubt it will stick. The important thing when gluing rubber is that it is clean. The rubber can be cleaned with gasoline, but consider ...
Paul's user avatar
  • 990
4 votes

What sort of tape/flashing is required to prepare for window installation in a timber frame wall?

I've been a fan of This Old House for ages, so it's a bit of my go to for how to do things very right. Since they are watched by a large audience all around the US (and probably elsewhere in the world)...
FreeMan's user avatar
  • 47.1k
3 votes
Accepted

What's the best way to flash this difficult corner above a roof in stucco?

Cement is porous, not waterproof, it acts like a sponge and will hold water. It also allows water vapor to pass through so condensation does not build up in walls. Tarpaper also allows water vapor to ...
Jack's user avatar
  • 34.8k
3 votes
Accepted

Did I install this roof vent correctly?

Yes this looks correct. You're right about cutting away too much shingle, but it looks like you fixed it with sealant.
Dotes's user avatar
  • 4,809
3 votes

What is the correct way to seal/flash coolant lines through siding?

Duct Seal is a common product used in the industry to seal around wall penetrations. It stays soft and flexible, so it handles expansion/contraction well. It's fairly easy to remove, and reapply or ...
Tester101's user avatar
  • 131k
3 votes
Accepted

How to install vent cap over cement pipe?

That flue pipe looks like "Transite" pipe which was used on some gas only appliances before about 1960. When I got into the heating business in the late 1960's nobody was still using it. There were ...
d.george's user avatar
  • 12.4k
3 votes
Accepted

Do I need to install flashing for this replacement window?

The purpose of the flashing it to direct any water that manages to get behind the trim back to the outside surface of the house instead of letting it continue to worm its way inside where it can start ...
FreeMan's user avatar
  • 47.1k
3 votes

Deck ledger flashing options

Typically, an aluminum or galvanized "z flashing" as you called it, would be installed under the siding, over the top of the ledger and down the upper lip a little. Decking is installed on ...
Fredric Shope's user avatar
3 votes

Can this roof flashing membrane be glued back down?

IMHO, that rubber-like membrane is supposed to be tucked up behind the bottom row of siding. Looks like it was added without pulling the siding out to tuck the membrane under. Some flashing may work. ...
SteveSh's user avatar
  • 6,882
3 votes

Is visible daylight between lead flashing and the chimney brick stack normal?

I am not an expert on brick chimney flashings. If this is horizontal then there shouldn't be daylight like this. But it would be difficult to install flashing on a rough brick surface and make it ...
Rohit Gupta's user avatar
  • 6,089
3 votes

Is visible daylight between lead flashing and the chimney brick stack normal?

I'm not a professional but to me that flashing is pretty obviously no good. (see update below) It looks to me like you have one piece of metal that was bent into a stair-step pattern with additional ...
aquaticapetheory's user avatar
3 votes

Who do I hire to repair damage from a leak from the deck into the house?

A general would probably be your best bet, as you'll need to pull up some parts of the deck to get access below, open up the roof (likely) or ceiling from below, possibly install/repair plumbing for ...
FreeMan's user avatar
  • 47.1k
2 votes
Accepted

What is the correct way to seal/flash coolant lines through siding?

There are all kinds of options, but the cleanest are probably purpose made flashings specifically for AC lines, like these ones: Note that it is very important to tie a flashing like this into the ...
Jimmy Fix-it's user avatar
  • 35.3k
2 votes

Leaking roof valley strategy

Yeah, that roof's pretty beat. I'd actually go heavily at that seam with Mortar Caulk (its gritty & gray), the whole length of the seam if you don't know where the leak is. But, spraying a hose at ...
Iggy's user avatar
  • 10.3k
2 votes

Vented soffit under bay window

Vented soffit below the window will allow air in, and will reduce the effectiveness of insulation. Other than that, it wouldn't cause a problem, but you're already concerned about the cold near the ...
DrewJordan's user avatar
2 votes
Accepted

How do I seal overlapping sections of flashing around the perimeter of my house?

The Z flashing is there to prevent water from creating water damage as you have noticed. The flashing is usually overlapped and that is sufficient unless in a windy area then a very small bead of calk ...
Ed Beal's user avatar
  • 103k
2 votes

What kind of roof flashing is this and is it up to code?

I can tell you it is inappropriate and must have been installed by someone that doesn’t understand flashing and counter flashing principles. The Code is clear, “The exterior walls shall provide a ...
Lee Sam's user avatar
  • 23.2k
2 votes
Accepted

Flashing around chimney and gap

You should caulk this with the best exterior caulk you can buy (doesn't have to be roofing, but do NOT use latex caulk for this). Don't use expanding foam, as it's not waterproof. You might want to ...
Machavity's user avatar
  • 24.7k
2 votes
Accepted

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

As a temporary fix, spread a layer of Henry Roof Patch around the area where the Pipe Flashing will go. Then press the boot down into the cold patch. Install a screw into each corner and attach the ...
Jerry_Contrary's user avatar
2 votes
Accepted

Should an exterior surface-mounted outlet box on wood lap siding be flashed?

I don't think using a flashing will hurt anything; but I also don't think it is necessary if you properly install a weatherproof box. You should consider potential cut/scrape hazard scenario as people ...
Jimmy Fix-it's user avatar
  • 35.3k
2 votes

How can I locate and repair a leak on a flat roof?

One option which I used long ago when I did not want the cost of a new roof ; I got a gallon of liquid roofing tar and brushed it on every suspicious spot . I had a few damp spots in the roof decking ...
blacksmith37's user avatar
  • 8,291
2 votes

How can I locate and repair a leak on a flat roof?

I would ask a few more questions, like, is this a home you plan on living in for years or just a long term Airbnb that you want to patch ? Maybe I'm misunderstanding your comment about the hole, but ...
CoffeeBaconAddict's user avatar
2 votes

How to cap abandoned drain stack vent flashing

Find a Tupperware bowl of the right size, and a tube of construction glue. Glue the bowl over the hole. Enjoy the satisfaction that comes from a job well done.
kreemoweet's user avatar
  • 3,454

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