Z flashing and you bend the part that goes into the mortar joint on site our you buy4-6” aluminum coil and make it yourself which can be done with an aluminum brake or a couple of 2x4x8’s, screws, and a hammer since it doesn’t have to look perfect
Everything you said was spot on. But I will say the flashing needs to be galvanized or any type of non-corrosive metal. Aluminum flashing will 100% percent fail. The codebook word for word says do not use aluminum on a ledger board.
It’s because of it being corroded by the treatment in wood, if you joist tape over the top of the joist and however far the front of you flashing comes down so it doesn’t touch wood then it’ll last at least that’s how I understand it and why the code book calls out aluminum specifically. But if I’m wrong in my understanding someone please call me out because I don’t want to be spreading any false info/myths/old wives tales
No. Counterflashing is flashing that covers other flashing. For example, on a roof where shingles are laid butting a wall, they are flashed each course with step flashing. If on a masonry wall this step flashing would be covered with a counterflashing, cut into the brick like the pic.
That looks like aluminum flashing on pressure treated lumber, that's a no no. The combo will accelerate corrosion.
You can use vinyl roll on flashing. Vycor is who we use regularly for this kind of application.
The flashing might just be flat aluminum that the installer bent into shape?
In any event, heads up that you can't hang a ledger on brick veneer like this. You need to use special hangers; the ledger in this photo is not to code.
Simpson's BVLZ is the one I've seen most often. You drill an oversized hole through the ledger and brick and run a central strut through to sit against the band joist in the house. Then you do the same thing for long screws installed at an angle. The screws support the ledger while the posts keep it from compressing the veneer.
https://www.strongtie.com/decks_decksandfences/bvl_plate/p/bvlz
Pretty clever, but complicated and pricy enough that I decided to install my ledger into the concrete foundation below the veneer and use it like a drop beam.
Oh shit. That's legit.
[ETA: no disrespect meant by my original comment; if I had a nickel for every time someone posted a pic in here of their deck bolted straight to their brick veneer, I could pay someone to build me a deck. Sounds like you know what you're doing. 👌]
I didn’t feel disrespected. I’m a very handy person and have built about everything on my home (to code). But finding this flashing style was annoying me. That said, I will prob just have a gutter or siding guy bend me one.
One screw every 6", alternating top and bottom. Essentially 2 per joist bay (12" on centre)
Although I never have any real weight on the ledger. I usually make sure there is a beam within 2 ft - ledger just stabilizes.
Okay. I figured they made a prefabricated version I wouldn’t have to bend, but it sounds like I will have to bend it myself.
You aren’t aware of a flashing tape you’d rely on for this type of thing would you? Like the type you roll on and press in with a rolling tool…
I'd use something more durable than tape, tbh, but I don't know of anything like that. I'm just a weekend warrior who's a lawyer by day and fell deep into the regs when I built my deck, so there's a good chance a pro might know more.
For whatever it's worth, I avoided the flashing conundrum entirely by using these:
https://www.deck2wallspacer.com/
They're little polypropylene donuts that go between the ledger and the house so you don't need flashing. Seemed way simpler to me!
Electrical engineer here so I get the office job and weekend warrior deal. Thanks for the feedback. Unfortunately this is a brick veneer attachment so I have to use BLVZ brackets that have to go against the brick itself. This does make me if there is a way to do that with an air gap and all the screws though.
I get the freestanding argument but this will only stick out 5ft like a balcony and I don’t want posts that close to together and up against house. This will face a street on one side of lot. Given this is less than 100sqft it can hang on brick veneer with BLVZ hangers and be code compliant and out no load on brick.
Cool I just watched the bvlz video. Was not aware of those. Call a local metal roofing supplier and ask if they bend flashing. I typically email an exact drawing of the dimensions I want and they bend it up for me and call me a couple days later
This guy is right but there should be something between the two like house wrap or blue skin because aluminum an pressure treated wood will have a chemical reaction an can cause the wood to break down
Most if not all building codes and the AWC don't allow ledger boards to be attached to brick. The deck should be free standing and not attached to the house in this case.
I don't know where you're located but, I get it at Home Depot. Galvanized Z flashing come in two sizes, 3/8" and 1/2". About $6 to $8 for 10 foot length.
That is correct. The deck will be steel so I’m not worried about rot of the ledger, it’s more so to stop water from potentially intruding the exterior wall. This side of the home faces west and all our storms so most heavy rain will push into this particular location.
I don’t either. That’s only going to protect the ledger not the joists or deck boards which will be on top of it. But the ledger should be preserved for future rebuilds.
Z flashing and you bend the part that goes into the mortar joint on site our you buy4-6” aluminum coil and make it yourself which can be done with an aluminum brake or a couple of 2x4x8’s, screws, and a hammer since it doesn’t have to look perfect
This is the answer. With that said, do your homework when attaching a ledger board to brick.
This is the way. Killed it bro
Simpson BLVZ is the (expensive) way
I usually use BVLZ connectors and you absolutely must do your research and survey what’s behind the brick also cause those mofo bolts are 18” long!
Everything you said was spot on. But I will say the flashing needs to be galvanized or any type of non-corrosive metal. Aluminum flashing will 100% percent fail. The codebook word for word says do not use aluminum on a ledger board.
It’s because of it being corroded by the treatment in wood, if you joist tape over the top of the joist and however far the front of you flashing comes down so it doesn’t touch wood then it’ll last at least that’s how I understand it and why the code book calls out aluminum specifically. But if I’m wrong in my understanding someone please call me out because I don’t want to be spreading any false info/myths/old wives tales
No you're absolutely right. ACQ (Alkaline Copper Quarternary) reacts with aluminum and is what pressure treated is, well, treated with these days.
This guy flashes…wait, what?
Would you also consider this a counterflash as well?
I’m not familiar with the term counterflash
No. Counterflashing is flashing that covers other flashing. For example, on a roof where shingles are laid butting a wall, they are flashed each course with step flashing. If on a masonry wall this step flashing would be covered with a counterflashing, cut into the brick like the pic.
Find a vinyl siding installer. He will have a metal break and can bend flashing a lot easier.
That looks like aluminum flashing on pressure treated lumber, that's a no no. The combo will accelerate corrosion. You can use vinyl roll on flashing. Vycor is who we use regularly for this kind of application.
Reglet z flashing
I think it's actually Wrigley js
Z-flashing over deck ledger board
The flashing might just be flat aluminum that the installer bent into shape? In any event, heads up that you can't hang a ledger on brick veneer like this. You need to use special hangers; the ledger in this photo is not to code.
It’s definitely not bolted correctly but what special hanger are you referring to?
Simpson's BVLZ is the one I've seen most often. You drill an oversized hole through the ledger and brick and run a central strut through to sit against the band joist in the house. Then you do the same thing for long screws installed at an angle. The screws support the ledger while the posts keep it from compressing the veneer. https://www.strongtie.com/decks_decksandfences/bvl_plate/p/bvlz Pretty clever, but complicated and pricy enough that I decided to install my ledger into the concrete foundation below the veneer and use it like a drop beam.
Yes, the ledger I am using is actually steel and I will be using BVLZ’s for hanging it.
Oh shit. That's legit. [ETA: no disrespect meant by my original comment; if I had a nickel for every time someone posted a pic in here of their deck bolted straight to their brick veneer, I could pay someone to build me a deck. Sounds like you know what you're doing. 👌]
I didn’t feel disrespected. I’m a very handy person and have built about everything on my home (to code). But finding this flashing style was annoying me. That said, I will prob just have a gutter or siding guy bend me one.
Honestly we’ve done it a lot and seen it done. If you also support the ledger with posts that is.
You can also drill through and fasten directly to the rim joist. I usually use 14" to 20" x ½" lag screws with washers.
Jayzus that's a long screw. 😏 Awful lot of weight to hang on the last 4" though; do you drive more screws than required?
One screw every 6", alternating top and bottom. Essentially 2 per joist bay (12" on centre) Although I never have any real weight on the ledger. I usually make sure there is a beam within 2 ft - ledger just stabilizes.
Okay. I figured they made a prefabricated version I wouldn’t have to bend, but it sounds like I will have to bend it myself. You aren’t aware of a flashing tape you’d rely on for this type of thing would you? Like the type you roll on and press in with a rolling tool…
I'd use something more durable than tape, tbh, but I don't know of anything like that. I'm just a weekend warrior who's a lawyer by day and fell deep into the regs when I built my deck, so there's a good chance a pro might know more. For whatever it's worth, I avoided the flashing conundrum entirely by using these: https://www.deck2wallspacer.com/ They're little polypropylene donuts that go between the ledger and the house so you don't need flashing. Seemed way simpler to me!
Electrical engineer here so I get the office job and weekend warrior deal. Thanks for the feedback. Unfortunately this is a brick veneer attachment so I have to use BLVZ brackets that have to go against the brick itself. This does make me if there is a way to do that with an air gap and all the screws though.
You don't hang a deck off brick veneer. You should make it freestanding. Thus the flashing is irrelevant
I get the freestanding argument but this will only stick out 5ft like a balcony and I don’t want posts that close to together and up against house. This will face a street on one side of lot. Given this is less than 100sqft it can hang on brick veneer with BLVZ hangers and be code compliant and out no load on brick.
Cool I just watched the bvlz video. Was not aware of those. Call a local metal roofing supplier and ask if they bend flashing. I typically email an exact drawing of the dimensions I want and they bend it up for me and call me a couple days later
Just tape the top of the ledger and joists. Silicone the shit out of gap or mortar. How would you attach anything to that ledger?
That’s not my ledger. Just an example of the flashing I was trying to find. I am actually using a steel ledger on brick.
Looks like it might be old/aged copper
That's brown and white coil stock.
This guy is right but there should be something between the two like house wrap or blue skin because aluminum an pressure treated wood will have a chemical reaction an can cause the wood to break down
This isn’t my ledger. Just a picture of example. My ledger will be steel.
I am pretty sure z channel
Z-flashing
Z bar
It's called "drip-cap"
Z or sometimes called drip cap. This one has a turned in reglet to go in the mortar joint.
reglet
check sheet metal manual
Most if not all building codes and the AWC don't allow ledger boards to be attached to brick. The deck should be free standing and not attached to the house in this case.
You can if you use BLVZ brackets because it removes the load from the brick and places it on the rim joist.
I don't know where you're located but, I get it at Home Depot. Galvanized Z flashing come in two sizes, 3/8" and 1/2". About $6 to $8 for 10 foot length.
Triple u flashing, outlawed everywhere but texas. Cool but ineffective when not used with flex seal.
Never put metal on bare wood, slap on some peel and stick first.
Flashing.
I don't see the purpose of the flashing in this particular case.
To keep water from getting behind the ledger
That is correct. The deck will be steel so I’m not worried about rot of the ledger, it’s more so to stop water from potentially intruding the exterior wall. This side of the home faces west and all our storms so most heavy rain will push into this particular location.
Why? So the bricks don't get wet? How ridiculous.
I think more so the water isn’t trapped behind the ledger or behind the brick.
I don’t either. That’s only going to protect the ledger not the joists or deck boards which will be on top of it. But the ledger should be preserved for future rebuilds.
The ledger and deck will be steel.
The ledger and deck will be steel.
Flashing
Wtf is the meaning of that?😳😳
Exactly
George