Building an Awesome Covered Deck - (Part 2: Waterproofing)

This video covers all the waterproofing, along with a bit of other stuff we ended up doing.
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[@jacobmiller546]

I did my balcony a couple years ago in 45m EPDM pond liner (30x12). I used adhesive caulking in between the through's and it helped tremendously with keeping them straight from gravity. Mine will last longer than I will.

[@Indus2020]

I am going to keep my joists at 12” OC. So the space between them is 10.5 inches. Keeping to required (local township laws) of 0.25” drop per foot- the drop over 15 feet is 3.75 inches. I’ve made a mock-up of this and 3.75 inches is too shallow for my liking - so I’m making that 5 inches, giving 0.33 inches slant per foot - gravity pull on the water will make the flow easier. With this drop at 5 inches from top of the joist, this also gives me a better drop of 3 inches for the “return” bladder from the other side no - I see I can make that a drop of 3.5 inches. The longer bladder is getting a drop of 5 inches over its length - The smaller - coming from the end of the deck, is afforded a drop of 3 inches. A clear gap of two inches between ! Just in case we have a deluge, this two inch gap will be able to manage that deluge. Mathematicians amongst you will be able to work out the Bernoulli rate of flow with a drop of 0.33 inches per foot, and a a width of 10.5 inches and a height of 2 inches! Go for it !!!!

[@ReibahDarling]

Very interesting. Thanks for the waterproofing. Great stuff

[@johnangelilli1164]

Great ideas for lattice substitutes. Very digestible length.

[@Indus2020]

Thank you for this video . Although you could use words like, “ baffles” and “ bladders “ . . . and “return baffles” etc! As opposed to “ he’s cutting one portion of this . . . waterproofing deck,” But on the whole / thank you ! A acceptable effort.

[@FernandoGomez-oq2oi]

Guau hermano. Ustedes están haciendo un excelente trabajo. Dios los bendiga!

[@samu3813]

Why the waterproofing and guttering? Are you trying to keep the below dry when its not usable space? Or you feel like dispersing the water away from under the deck? If so, i wonder, that area as been getting rain long before you added the deck, so unless it was standing water or impacting the house, i am not seeing the water proofing reason. Maybe you can add the root problem you were trying to solve?

[@keithtraa]

well done!

[@Indus2020]

Please Can you add some details about the BAFFLES ? Their size, how far below the top of the Deck Ledger you attach them. How much do you cover the sides ? Do they go into the gutter ?

[@user-wt6qv4yc1m]

How do you waterproof the railing posts going through the EDPM? It looks like just the tape.

[@martinmcfly3433]

Great work. Building a deck by myself and am doing the same waterproofing system. Did use stainless staples on the epdm? My deck frame is 42' 5.5" wide. 28 feet of that is 20 feet deep and 14 feet is 12 feet deep. Pretty proud of it. Waterproofing to use underneath as a shed for yard equipment. Thanks for the video. Very helpful.

[@thebedfords]

I don't remember if we used SS or galvanized staples because we've used both.

[@martinmcfly3433]

@thebedfords thanks for the reply. Built a deck before but never with the waterproofing. Dr.Decks used the same system but looked like he used caulk on top of the staples. Thought that might have been overkill if you use ss or galvanized staples with the gtape. Thanks again for the videos. I keep watching them again because my deck is taking so long to build because its just me. First summer was footings, im almost done framing. Next year will be composite decking

[@Indus2020]

Please can you tell me : 1) what size are your joists !? 2x10 or 2x8 ? 2) how low do you allow your “droop” to be at the far end!? 5”, 6”, or 8” ? I’m trying to do mine own and I find that this droop determines how wide the fat end of the bladder will be, Please help - I got Dr. De is doesn’t answer - despite taking his course.

[@dylanpeterson6192]

Dude. That's sick. probably way overkill, unless there's a lot of blowing rain there, or if the porch roof is just super tall, BUT awesome. This is the kind of stuff that really sets people apart. Roughly what did it cost per sqft if you can remember?

[@thebedfords]

You’ll see if you keep watching (and I think I actually spoke about it in a later video). Two sides of the roof are about 8’ high, but the gable end is higher because of the open truss design. A large percentage of the deck definitely gets quite wet during the rain, depending on how windy it is. But it’s also for when you want to rinse off or power wash the deck. I don’t remember how much it cost, but it wasn’t that much. Material costs, and I think it was about 1.5 days for two people. I know that’s probably not super helpful, but it’s the best I can do :)

[@tenzinminz5150]

Never heard of water proofing the deck.. learned something new! But a question, 6:16 all the posts are touching the ground, will it pass the inspection? Thank you.

[@thebedfords]

So for the size of this deck, the building inspector required extra solid footings. I think I showed them being poured in the first video, but might not have shown them after that. The holes were dug 20” across both sides, and I believe 22-24 inches deep. I can’t remember exactly. Then we poured 8” deep footings in the bottom of the hole. It was a total of 15 holes, and required about 3500 pounds of concrete. The holes are then back filled, which isn’t an issue because the posts themselves are rated for ground contact, unlike most treated 2x framing material. Pretty much all posts will be treated for ground contact.

[@KyleSmith-eu4zu]

Hey! Little late commentimng but how did you waterproof or flash the deck to the house? I didnt see any flashing over the rim joist. Thanks! Kyle

[@Playback007able]

My attached deck project is basically a rectangular 32’ wide x 15’ deep/projection from the ledger. The box’ is treated 2x12’s 12” on center attached to concrete filled sonotubes by U-brackets. Would you recommend a center supporting beam/girder? The deck is open with the exception of a 10’x12’ cedar framed, metal roof canopy which will be reinforced with tailored’ blocking. Thnx for your video and thnx in advance for your take

[@thebedfords]

You’d have to double check the building code, but that joist span should be more than fine.

[@panjrobarobaipanj7259]

I enjoy watching your videos and I’m a huge fan. Keep up the good work. Just wondering how much a deck like that would cost? ✅👍✅

[@thebedfords]

Thanks very much. This whole project was around 80k

[@panjrobarobaipanj7259]

Thanks

[@CGGC0202]

love that water proofing method, can you share the details on the name of the product used ? is it just like a shower pan rubberized liner or made specifically for decks ?

[@thebedfords]

It’s just EPDM rubber for roofing. We get it from a local building supplier. I believe it was a 10’x50’ roll, 60 mil thick.

[@CGGC0202]

@@thebedfords awesome, thank you

[@thebedfords]

@@CGGC0202 sure thing. Thanks for watching.

[@martinmcfly3433]

Great video. Just found your channel. Building my deck myself with drainage like this video. Ever have trouble with the joist not touching the beam (beam nearest the house) where the joist crowns? I thought there might be 2 separate joists but looks like you ran 1 joist over 2 beams

[@thebedfords]

Not very often. We grade/sort our joists by size, so that greatly reduces the chances of it happening. But if it does, I just use a composite shim to make up the difference. Thanks for watching, and I’m glad you enjoyed it!

[@martinmcfly3433]

@@thebedfords thanks for the response. Look forward to more videos!

[@johnangelilli1164]

I also do grading, but on occasion shimming or planing is necessary.

[@thebedfords]

@@johnangelilli1164 It sure is. It's amazing how a little bit of extra effort on the front end pays such high dividends on the final finished product.

[@skaverick]

How does the drainage work under your picture framing and middle board?

[@thebedfords]

It doesn’t really. But those are small areas, and once they collect enough water, it would either run off the edge of the deck or into the trough next to it. Still keeps the framing dry, along with everything under the deck.

[@weekendhomeprojects]

Between material and man hours, that waterproofing system cost around $1,500 or $2,000?

[@thebedfords]

I’m not sure exactly how much it costs. I’m not involved in the estimating/financial side of our business, but I would guess that it was around that or maybe even a little less.

[@stefanunnasch161]

What are your thougths on a batman cape with a fan -shaped sheet that handles several rows of joists?

[@thebedfords]

Never tried it, but that doesn't mean it wouldn't work...:)

[@Moparkid13]

Love the deck build! when do we get part 3?

[@thebedfords]

I need to finish editing it. I took a bit of a break from making videos, because it had started feeling like something I HAD to do, not something I WANTED to do. But I’m ready to get back into it now, so I will do my best to get part 3 done soon.

[@boblesser9990]

@@thebedfords anxiously awaiting part 3! :)

[@thebedfords]

@@boblesser9990 I just finished editing it last night. It will go live in the next day or two

[@sergiocardenasjardinez7192]

😮

[@tronader]

Could you tell where to buy this epdm I’m trying to install on a deck joist 16oc

[@thebedfords]

I believe we got it from ABC Supply Company.

[@Indus2020]

I wondered is there a general formula for cutting up the bladders. One end/ side is narrower than the opposite end /side. 14” at the narrower and 24” at the fifer end ? I am going to say this is for joists that are 12” on center ! Yes !?

[@thebedfords]

That would be pretty close. Plumbing code for the minimum fall of a pipe is 1/4" per foot, so I think we were usually shooting for something like that for things like this.

[@Indus2020]

Does this not depend on the width of the joists ? For 13” OC, the width on the shallower end ought to be closer to 14” and the far end, where it’s deeper / droopier, shoukd that not be 24 inches !? Please sone one reply - I’m struggling with this also.

[@thebedfords]

@@Indus2020 yes, it does depend on the joist spacing.

[@Indus2020]

Thank you @theBedfords.

[@TheChupacabra]

Did I miss it in here, how do you plan your cut for the membrane to get the right sag? Start at the oc width then add 50% for the end of the trough?

[@thebedfords]

My recollection is that we cut the piece 18” wide at the “top” & 24” wide at the “bottom”. I think we cut a couple small scrap pieces first to make sure that change from almost no sag to significant sag would do the job.

[@Indus2020]

@@thebedfords

[@Indus2020]

@@thebedfords

[@Indus2020]

What spacing of joists OC do you have for these sizes ? 12” OC Or 16” OC ???

[@number1pappy]

This is ingenious! I take it the owner didnt want a roof??

[@thebedfords]

Keep watching :)

[@dscience8865]

What type of g tape is compatible with epmd?

[@thebedfords]

This deck is the last time we've used this system (just because we haven't done a project like this recently), and it's been long enough I don't remember exactly which tape we used. I'm pretty sure we used whatever @drdecks suggested. You may be able to find out from a video on his channel.

[@bigcat6329]

You didnt use butyl caulk

[@CeicelRockMonster]

Sideways latticework look like shit.

[@thebedfords]

I disagree, but thanks for voicing your opinion so eloquently.

[@Mr_I2obot]

What you have just said is one of the most insanely idiotic things I have ever heard. At no point in your rambling, incoherent response were you even close to anything that could be considered a rational thought. Everyone on this page is now dumber for having read it. I award you no points, and may God have mercy on your soul.

[@dt8460]

There’s always one idiot

[@dianas514]

@@thebedfords I love the sideways! Sad that there’s always one person that never learned if you can’t say something nice keep it too yourself. 😊. Thanks for a great video. We just found your videos today while searching for how to waterproof the underside of a deck. We’ve watched a bunch of waterproof videos and we think your system is the one we’ll go with. The area under our deck is over about 1/2 of our garage. What we originally did about 12 years ago is failing. We ended up with a bit (ok way more than a bit) of water in the garage this past March between snow and rain. Thanks again. Looking forward to watching your other videos.

[@thebedfords]

@@dianas514 thanks for the kind words, and I hope you enjoy the rest of the videos :)

[@drmrjon]

Dude, stick to filming the deck and the over all work. We don't need you doing selfies constantly.

[@thebedfords]

I'll do my best. But since this is my job, and I'm not getting paid to make these videos on my own personal channel, I try to limit the amount of time I spend filming while I'm on the clock. I often did the update/progress report at the beginning or end of the day, when I'm not on the clock.

[@courtneyelizabeth4710]

drmrjon he's literally giving out free information on how he built a probably 60k+ deck. Maybe let the guy film the way he wants.... I like when he talks to us selfie style. It's his channel and he can do what he wants.

[@joehughs1122]

drmrjon Bro, stick to your Disney+ subscription and get the hell off construction channels 🙄