Green Roof DIY Episode 3: Waterproof Membrane | Drainage System Installation
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- Опубликовано: 4 ноя 2021
- Today we are laying down the water proof membrane and implementing a drainage system. The goal is to maintain a waterproof seal over the roofing material while allowing water to enter the pipe and down the downspout. Last week we built the deep bed frame of our DIY green roof on top of our pasture shelter and continued to create more support so that the structure can hold the weight of the green roof.
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Love your video. Bought seven acres in San Luis Colorado USA and building rammed earth house and garage. Love your roof system.
How did the fabric drain. They dont really let water move fast. Curious if you ever had water pour out the box bypassing drain
What is the thickness of the pond liner you used?
Hows the drainage system hold up in storms in winter
Which product did you seal the hole in the EPDM? Is that just silicone caulking?
I'll use a circular or jig saw to cut slots in the drain and tell how it goes.
Is there a benefit to having the pipe versus just doing a gravel trench that leads to a drainage hole in the corner?
That's what i was thinking too @mateo Kaiser. I'm also wandering why the timber is there. Would it not be better to have it open so the water can flow down?
Great point, Mateo! At first we wanted to use drainage holes on the edge of the roof like you suggest. I had concerns with how the the roof would move and warp over time , possibly affecting the pitch of the roof. The current drain pipe is angled to keep a constant pitch at all points across the lowest end of the roof. I dont remember how many holes in total were drilled, but adding together the total circumference of these holes greatly outmeasures one or even two stand-alone drains. The goal moving forward is also for rain collection and filtration, so I was hoping to accommodate large amounts of rainfall. I hope this answers your question!
Hey Tommy! The 4x4 timber is used as a brace to keep the lower bed wall from buckling under the weight of the media + rain + stones. The 2x4 before the gravel pit ties into the 4x4 to help distribute the weight evenly across the frame. There is a 1/2" gap beneath the 2x4 to allow water to enter through the geotextile fabric into the gravel pit. Let me know if this is not helpful or if you have any other questions!
@@IndyHomestead I completely missed the gap you created below the 2x4. That makes more sense to me :) Thank you for explaining.
@@IndyHomestead Hello! I am wondering how clean your water is when it comes out of the tap at the other end? i.e. is the water clear and not murky? We want to do something similar for a handwashing station on an outhouse green roof but aren't sure if the water would be murky from the soil. Thanks!
I’m working on my protect today, and hoping you’ll see this question. Why is the pipe itself wrapped in pond liner? Would that not prevent water from draining into the pipe?
That material used to surround the pipe is a semi-permeable membrane called geotextile fabric. It lets water through but prevents debris from entering. Good luck!
@@IndyHomestead thank you so much! That makes perfect sense 😊
This is a wonderful video, may I know all the materials used to create this drainage system?
Absolutely!
4" PVC pipe (and desired attachments), rubber pond liner (waterproof membrane), water permeable geotextile fabric (to cover the pipe), a construction adhesive compatible with rubber, and stone of your choosing.
@@IndyHomestead thank you so much!
I don’t get it? That 2x4 just blocked the pipe at the end
looks like there is a gap between the 2x4 and the roof (about 1/2"). The only thing I don't get is how he "fixed" the 2x4 to the lateral beams... I hope @IndyHomestead can clarify this!
Why drill holes in drainage pipe and then wrap it in pond liner? Seems like water can't get in there. It's mostly draining through the gravel.
looks like they are not wrapping the pipe with a pond liner, but instead they are using a water permeable geotextile fabric.