Flat Roof Drains design and installation - the Ultimate draining system for flat roofs
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- Опубліковано 12 вер 2024
- The ultimate draining system that will prevent a roof from flooding.
Flat Roof Drains design and installation are very critical. Most drains are elevated higher than the roof surface itself. This issue can be found in 80% of flat roofs. Lowering the drain into a catch basin will solve this issue. The catch basin is to collect debris and allows water to flow into the pipe even after the filter or strainer is clogged.
It may cost more to install a catch basin around a drain but in the long run, will save the roof from costly repairs. A catch basin has the following benefits:
1. Allows water to flow over debris through the strainer
2. It buys time to remove debris that clogs the strainer
3. It prevents the entire roof from flooding causing possible leaks
4. Prevents standing water that can deteriorate a rubber roof
5. Where there is no pooling of water there is no growth of plant and moss
6. Prevents mosquito breeding ground
7. Standing water on a flat roof will cause the Ultraviolet protective coating to peel
8. A catch basin will prevent a premature seam failure or leak on the rest of the roof
The benefits of a catch basin around a drain outways the cost of installation by far. Most flat roofs have failed due to an improper draining system.
Excellent illustration on proper installation of roof drains! I work with these products and get questions regarding installation, proper practice and this is helpful for me!
Thanks
I am glad you liked it
We call this a sump, not a basin in Australia. Love your work.
Thank you for this. It's exactly the problem I have, with a roll-on roof.
Thank you!
Getting a new PVC roof and the roofer is suggesting moving away from drains to 4 scuppers only. Also placing additional Fanfold to create minor decline to move the water and limit pooling. Anything odd or off about that recommendation? We live in Seattle, so it ices only from time to time. I was surprised because originally they were going to add an additional drain, but they feel the drain system present is not reliable and said this was better and more cost effective. We have had leaks from the current drain system and the roof is almost 5000 sqft. Thank you!
Awesome!
Thanks!
isnt that Algodoo ? interesting video btw
Great Video. What software are you using for your 3D models?
yes, i agree but he left out the support blocks for the lowered plywood
Hi Jamie. I had the 3d video made by someone in the Philippines. I am not sure if he used Maya? or some other software
Hi I plan to have a terrace, precast concrete slabs and then pour few inches on top of it. Can you let me know if the membrane has to go in between the precast slab before pouring or after pouring. Final layer will be natural stone or tiles
Thanks!
My opinion is you need to research more. I think after the precast concrete you should do the membrane. Then on top of that do Pedestal system for your tiles or stone. That way the water would flow through the tile joints that has no grout to the membrane and then out.
But i know to little. My son knows much more and has done this kind of stuff. check out his channel and contact him @allroofusa
Can I use this Video to guide my customer how to install the drains? I am working for drains manufacture. Thanks
Yes anytime
sorry for such a late reply. You are more than welcome to use the videos
Just remove the strainers. And I love how the water stays on one side
It helps if you use your imagination. Maybe you like to be spoon fed everything. Just kidding
Good idea, but what about where the drain and connecting piping need to fit in 2x12 roof joists?
Hey Claude
To make a basin you will have to cut one roof joist and use cross headers to transfer the load to the adjacent joists. Normally a carpenter knows how to do that.
But this should be in the architect's or engineers' plans.
I often do this concept on existing roofs. Sometimes there is so much build-up of insulation and several roof layers, that I am able to remove the insulation and other roofing material to make a drain basin.
Thanks for the question
Naas
Do you have a video on how to cut the deck and build a basin for drain?
I think I have a video on that but i am not sure if I have posted it. It maybe still raw and I will have to edit it. I'll make a note to look for it
I might have something but I am so busy working that I barely get time to edit any videos
You never install a drain down to the substrate. Always sandwich the drain between whatever roofing material you are installing. A basin is a good idea in theory but most the time not possible.
Yes you say the right thing but for the most part the way you say to do it, causes the drain to be higher than the rest of the roof surface.
I do not install drains the way any book might describe. I use common sense and try to lower it wherever possible to create positive water flow. Most carpenters/roofers will just install a drain on a substrate and never try to create a basin. It cost time. At least 3 hours to get it right per drain. But at the end I have better results and a drain that works for the rest of its existence.
2x10 ceiling joists, no room for this
Wrong. I always make a sump.
WRONG WAY ALWAY LOWER THE DRAIN TO ROOF DECK
what is wrong about this? The drain is lower than the roof deck?