Under Deck Drainage System, 50 FT Roll with 16 in Joist, 3-in-1 Waterproof Membrane with Built-in Self-Flashing & Self-Funnel, Heavy-Duty 30 Mil, Top-of-Joist System, US Patent.

Installed this under a deck we are building on a brand new house. It installed fairly easily. We were installing it in 14 and 16 ft runs. It was a two-person job. We used the recommended 4" Grace vycor as our flashing. Also a great product It rained for the first time last night and the patio below is dry. I compared it to another system that installs like soffit underneath the deck boards. The thing that sold me on this system was this actually protects the top of the deck framing. Too many times I have had to tear down a deck because the pressure treated framing has finally deteriorated. I would recommend this to anybody who wants to waterproof under their deck.

After an initial problem with shipping the company resolved the issue very responsibly. Great customer service. This product is not extremely flexible but is very workable. I am using it on 16 inch on center joists that are already tilted for drainage. The worst part is screwing the downspout on. I guess I'm not cutting it correctly. I have a very small gap at the corners of the cut. No problem. I'm just going to apply a small amount of silicone caulk around the spout on the underside. I'm using 6 inch wide butyl tape at the overlaps (Nashua window and door flashing tape from Home Depot. I've also used Trex Rainescape butyl tape but it's double the price). The product can be heated with a hair dryer or heat gun for molding. Overall, other than the shipping problem that the company fixed, I'm pleased with the product and would use it again.

Pros: - Works great if it is being run with the slope of the deck (no need to worry about building your own slope). - A "funnel" can easily be created at the end of the run to channel water into a gutter. This is done by cutting two small pieces (~8-9" for 10" joists), facing and sloping them towards each other into the gutter. Cons: - As other people have mentioned, it is very difficult to work with at first. I suggest using a small 12" piece and don't fully tack it down for practicing. - Does not work well when the joists are parallel to the structure (house). There is no "natural" slope in this type of installation and requires you to create your own slope. - Creating a funnel like suggested in the video is not easy and requires extra time. Comparison to competitors: - Cheaper than Rain Escapes but more difficult to work with. - More expensive than EPDM rubber roofing but EPDM rubber requires more planning and at least one other person. I personally used EPDM roofing for most of my installation (my joists are parallel to my house) and then used this product to complete it when I ran out of rubber. I also used this to create "funnels" into my gutter. I would have given this a 5 star rating if it was a little easier to work with.

Seems like a decent enough product, not very user-friendly. Stiff, holds any creases you accidentally put in it (and with it falling between the joists every 10 seconds, you are going to crease it a lot). To be fair, I'm 10ft in the air and working solo. Next time I'll get a large piece of pond liner or something I can get over more than one pair of joists and save myself a lot of hassle.

I purchased this system to put under my new deck. I was told by a gutter installer that it would be a waste of money to put gutters on my house. Because of the fascia's slant along with the metal roof, gutters would either not hang high enough to catch water or would hang so high that ice and snow will just rip them off. So I've had to think of other ways to get water away from my foundation. My old house has a stone foundation and water seeps into my basement constantly. One of the worst locations is my south facing patio where two roof lines pitch toward each other creating a waterfall that pummels the deck. All of that water would then seem into the ground and then into my basement. I have a dehumidifier that runs constantly in the basement and it could never keep up. Until NOW. Ever since I installed this, the humidity level has gone steadily down in the basement despite the increased amount of autumn rain we have had. This system was also much less expensive compared to the other systems I looked at. Since my patio is only a few inches off the ground, I didn't even have to worry about buying coordinating hardware because nobody will ever see it. It was easy to install the down spout adapters to the membrane and the membrane stapled down easily. So happy with this. Will be using the extra membrane to address one more side of the house that has some water seepage and my basement humidity issues should be over.

I gave this a solid shot and I just couldn't keep the wrinkles out. Quickly learned I was going to have to rely on the engineered slope of the deck and just pull it tight to joists because the rigidity makes it too difficult to add a slope. With that being factored, it was still unacceptable with the ridiculous amount of expansion this material has in hot sun. Installed in shade pulled tight between 8" spaced staples, after the sun hit it we had 1" raised bow between staples and the rain gutter was full of perpendicular creases. Looked awful. Maybe once deck boards were installed it would have straightened out some, but this is a 12'x48' section and i cannot risk that much work being wasted. Had to return remaining unused rolls, and consider other options. Good idea, flawed material.

Easy to install. I used a 5/4 decking board in between the joist and clamped it on the rim joist of the deck and ran it back to about 3 feet from the house to get my angle of run-off. Then simply rolled out the product and the 5/4 board helps to support it and give it the correct run-off while you are stapling it to the joists. The final 3 feet raises up toward the rim joist on the house. Then insert the drains, add a gutter and you are all set. Well done Goberco!!

Easy to use product for one person if you pre-install depth guides. I installed a a guide every 2 ft, each guide 1/2 inch lower than the last giving a 1/4" dropper foot along the length of the joists. Wet winter went by and the underdeck stayed dry.

Very easy install. Cross bracing at the midpoint of the joist bay helped to set & maintain slope. Very pleased with this Canadian product that (I think) does a better job than rain escape at a fraction of the cost!

Easy to install even though my joists are 12” not 16 centers.. had to cut one side down but it was very easy to do. Works well and I have no leaks. Manufacturer says they will start producing 12” product in near future. Very happy with purchase.

Takes a little to finagle it but I was using it to add more slope than just tack it to joists. Once I got it straightened out it was all good. Nice to have dry space under deck.

I recently installed this deck waterproofing system and was very impressed. The installation was straightforward, even for someone with moderate DIY experience. The materials feel durable and well-made, and the overall quality is excellent. It gives me confidence that my deck is well protected. Great product!

At times the plastic would buckle during instalation.