Browse Forums Outdoor Living Re: How to fix overflowing gutter with new Pergola 2Feb 26, 2013 10:37 am 3in1 Supadiverta. Rainwater Harvesting Best Practice using syphonic drainage. Cleaner Neater Smarter Cheaper Supa Gutter Pumper. A low cost syphonic eaves gutter overflow solution. Re: How to fix overflowing gutter with new Pergola 4Feb 26, 2013 11:41 am Install at least one more downpipe might be a help. The Harder You Try - the Luckier You Get ! Web site http://www.anewhouse.com.au Informative, Amusing, and Opinionated Blog - Over 600 posts on all aspects of building a new house. Re: How to fix overflowing gutter with new Pergola 5Feb 26, 2013 2:34 pm Nick82 yes the back of the gutter sits level with the top of the fascia, but I believe the front of the gutter is lower to allow overflow. I am new here so if posting details of a product of yours is against the rules then that's a shame as I would be interested to know. Hi Nick, I am assuming at this stage that you have decking or paving under the pergola that would make fitting a downpipe difficult. If you can post some photos, it would be good as I would also like to see the decking if applicable plus the location of any downpipes. The gutter should not have been fitted level with the top of the fascia as the regulations prevent this. There is an applicable calculation, referred to as fh from memory, that covers this. The calculation is too difficult for most people to work out and most plumbers just use a measure of 20mm at the back of the gutter's highest point to the top of the fascia. I am sure that this would also cover low fronted gutters as there is the gutter slope to consider...I might check later to make sure but it doesn't really matter here. A low fronted gutter does not require addditional continuous overflow provisions such as flashing as I mentioned as it's very design prevents over topping back to the eave or wall cavity. Forums frown on direct links to proprietary products as it would generally be considered spam. This particular forum is very good however but I think that I would need a sponsor/advertising link and I haven't acted on seeking information in this regard. I have been thinking about it. The solutions you are possibly looking at doing are messy. You need to remove the water. I will wait on the photos before deciding the next step. Where abouts are you? 3in1 Supadiverta. Rainwater Harvesting Best Practice using syphonic drainage. Cleaner Neater Smarter Cheaper Supa Gutter Pumper. A low cost syphonic eaves gutter overflow solution. Re: How to fix overflowing gutter with new Pergola 6Feb 26, 2013 6:24 pm SaveH20, thank you so much for your assistance so far. Here are some photos I just took to better explain my situation. I pulled back a tile and found that the existing gutter sits about the same height front to back and sits flush with the top of the fascia as mentioned earlier. The house was built around '88 and I believe it to be the original guttering. I have one down pipe at the end as pictured and another at the other end of the house. Adding another in the middle I gues could be possible but would not be very pretty. I am located in Canberra. Like ⋅ Add a comment ⋅ Pin to Ideaboard ⋅ Re: How to fix overflowing gutter with new Pergola 7Feb 27, 2013 12:13 am Hi Nick, Thanks for the photos. A little different to how I imagined it but overall pretty close. Downpipes fitted at the end of walls are very common unfortunately. I am guessing that the halfway point along the wall is slightly to the right of the open door. This is where the gutter's high point should be. The high point determines the gutter's slope and the roof area harvested but looking at the first photo taken from the other end, I notice that the back of the gutter is still at the top of the fascia. This indicates that the gutter has no slope. This observation is reinforced by the dirt pattern in the gutter. The pergola roof is also a fair size. There is really only one solution and that is another downpipe as suggested by bashworth. I thought about a couple of things but the problem comes back to the concentrated flow off two rooves during heavy rain discharging to a gutter with minimal slope and the distance between the downpipes. If you call a plumber, he will probably say that you need a bigger downpipe but I am absolutely sure that this would not solve the problem although it would help to a degree. The downpipe would be best plumbed so it came down the RHS of the small brick wall between the sliding door and the windows on the right...if that makes any sense. It would look ugly and you might also have an issue with the deck in regards to plumbing the new downpipe to the storm water. However, what I propose that you do is to have a look at something that I will PM you a link to and if you want to try it, I will send you one N/C. Instead of having a downpipe, you will have a 20mm pvc pressure pipe that you can paint and it will be barely noticed as it will go horizontally under the eave to the wall and then vertically down the wall. From there, it would either go under the deck to the downpipe (if possible) or along the floor/wall intersect to the downpipe. You will need to spend about $20 on some 20mm pressure pipe and fittings and you only need to drill one small hole in the gutter. It will provide a more than adequate flow rate as the device increases the pipe's flow rate by 1,000% or more. The first thing to do though is to run a hand broom along the gutter to better the roughness coefficient to improve the flow. 3in1 Supadiverta. Rainwater Harvesting Best Practice using syphonic drainage. Cleaner Neater Smarter Cheaper Supa Gutter Pumper. A low cost syphonic eaves gutter overflow solution. Re: How to fix overflowing gutter with new Pergola 8Feb 27, 2013 6:25 am Awesome, I will look at that today. A few points from what you have said, yes the gutter appears to have no slope towards the downpipe, which is evident as after rain water does pool in the middle of the gutter. Also the pergola roof slopes away from the gutter, not towards it, so any rain onto the pergola flow off the edge, not into the gutter. I am thinking that an extra downpipe fitted between the door and window might work. It would be a bit hard to fit as it involves cutting the deck to get it through but under the deck it could angle across and connect to the existing downpipe at the end. Re: How to fix overflowing gutter with new Pergola 9Feb 27, 2013 7:00 am I think bashworth solution is practical as well, or a bigger downpipe 100x75 instead of 100x50, although if you need to get rid of a lot of water in a hurry you should consider a rainhead. As for lack of slope in a gutter(I can already see some rust), I would just paint inside with bitumen emulsion based paint (available at Bunnings) which will increase longevity before full corrosion. Foremost Building Expert in Australia,assisting with building problems/disputes, building stage inspections,pre-contract review advice for peace of mind 200 blogs http://www.buildingexpert.net.au/blog Re: How to fix overflowing gutter with new Pergola 10Feb 27, 2013 9:00 am Nick82 yes the gutter appears to have no slope towards the downpipe, which is evident as after rain water does pool in the middle of the gutter. I noticed that a couple of mm was showing at the top of the gutter near the middle. Nick82 Also the pergola roof slopes away from the gutter, not towards it, so any rain onto the pergola flow off the edge, not into the gutter. Ok, that clears up a few things that were nagging me. I was looking at the flashing attached to the pergola roof and scratching my head plus I couldn't see how the diagram could have been mistakenly drawn with the roof sloping the wrong way. This does however lead me to now think that the gutter has been overflowing ever since the house was built and not just since the pergola was added! Nick82 I am thinking that an extra downpipe fitted between the door and window might work. It would be a bit hard to fit as it involves cutting the deck to get it through but under the deck it could angle across and connect to the existing downpipe at the end. You need additional drainage, there is no way out of it. If you have the room under the deck to divert a new downpipe to the other downpipe, then the downpipe would need to be a 90mm round PVC and the 100mm x 50mm downpipe at the end would also need to be changed to a 90mm round PVC so that the two pipes can couple. How far is it from the end of the pergola (near the door) to both downpipes? The fact that the pergola doesn't drain to the gutter changes the best positioning of a new downpipe quite a bit. How much and whereabouts does the gutter overflow? I was assuming that you had the pergola roof also going into the gutter but given that this isn't the case, changing one of the downpipes to a 90mm round might be enough although in situations like this where the downpipes are fitted at the end of the walls, the gutters nearly always overflow halfway between the downpipes. How far apart are the two downpipes? 3in1 Supadiverta. Rainwater Harvesting Best Practice using syphonic drainage. Cleaner Neater Smarter Cheaper Supa Gutter Pumper. A low cost syphonic eaves gutter overflow solution. Re: How to fix overflowing gutter with new Pergola 11Feb 27, 2013 9:41 am Is it possible that the rain is being pushed through the sheets and under the flushing?? Nick where do you have issues with water coming through? Is it in the middle or the whole way. Sorry if you have already answered this. Re: How to fix overflowing gutter with new Pergola 12Feb 27, 2013 9:48 am I would need to measure the house but to give you an idea in that photo the mid point of the house would be around just to the left of the door as you look at the photo, so the downpipe pictured covers the whole area of the pergola, and the other downpipe covers an equivalent area of roof not shown in the photo. So in a nutshell the Pergola covers roughly 40% of the length of the house. I like the idea of the product you showed me, this could hopefully be the answer I am looking for. Either that or install a conventional downpipe. Also I entertained the idea of installing a rainwater tank under the deck some time back when we had strict water restrictions in place, but lost interest when the restrictions were relaxed. I am thinking to do this again now as I can use this downpipe to divert into the tank. Re: How to fix overflowing gutter with new Pergola 13Feb 27, 2013 9:50 am B STAR Is it possible that the rain is being pushed through the sheets and under the flushing?? Nick where do you have issues with water coming through? Is it in the middle or the whole way. Sorry if you have already answered this. The water is leaking through between a small gap between the gutter and the fascia ~1mm. SO in heavy rain I get water streaming onto the deck. I also have noticed some water staining on the eaves which brought me to realise that water was getting into the roof cavity. Re: How to fix overflowing gutter with new Pergola 14Feb 27, 2013 11:14 am Nick82 the mid point of the house would be around just to the left of the door as you look at the photo This means that you could possibly fit something to the left of the pergola. Unfortunately, I cannot see that side but another drain doesn't necessarily have to be close to the middle as there is no high point. Overflows also often appear larger in volume than they actually are as they come over in sheet form. Nick82 I like the idea of the product you showed me, this could hopefully be the answer I am looking for. Either that or install a conventional downpipe. A plumber would probably charge $400+ to install a new downpipe, change another downpipe to a 90mm round and then connect the two downpipes unless A.C.T. plumbers work at cheap rates. You could fit the other product yourself and it would cost about $20. You can also divert that water to a tank. Nick82 Also I entertained the idea of installing a rainwater tank under the deck some time back when we had strict water restrictions in place, but lost interest when the restrictions were relaxed. I am thinking to do this again now as I can use this downpipe to divert into the tank. I can't see the available space under the deck but going by the lay of the background fence, there doesn't appear to be a lot of room. Were you considering bladder tanks? Bladder tanks are expensive and the water quality needs to be good unless there is a quick turnaround of the water stored. If you decide to do anything in this area, ask for advice in Eco Living. There is a lot of information to pass on that would save you heaps. I will PM some basics. 3in1 Supadiverta. Rainwater Harvesting Best Practice using syphonic drainage. Cleaner Neater Smarter Cheaper Supa Gutter Pumper. A low cost syphonic eaves gutter overflow solution. Re: How to fix overflowing gutter with new Pergola 15Feb 27, 2013 12:58 pm There is approx 1 metre in height under the deck, I investigated slim tanks that would fit at the time. I am thinking I will take you up on your offer using your product. Do you think that this will be successful and do you think it will work better than a standard downpipe? The problem with installing the downpipe to the left of the door is that there is a hot water unit between there and the downpipe at that end, and I would prefer to hide some of it under the deck. Also I think that locating it between the door and the window is closest to the problem and therefore will be the most effective. Re: How to fix overflowing gutter with new Pergola 16Feb 27, 2013 1:47 pm It is not a downpipe replacement, it supplements the downpipe during major rain events, only works during heavy rain and drains as fast as 3 garden taps. No point paying hundreds of dollars when you don't have to. Just PM a mailing address. EDIT: The product discussed was the Supa Gutter Pumper. https://gutterpumper.com.au/ 3in1 Supadiverta. Rainwater Harvesting Best Practice using syphonic drainage. Cleaner Neater Smarter Cheaper Supa Gutter Pumper. A low cost syphonic eaves gutter overflow solution. Re: How to fix overflowing gutter with new Pergola 17Mar 01, 2013 4:09 pm Hi Nick, If there is room to run the 20mm pipe down the wall to the left of the door, then this would be the best place to fit it. The greater roof area drains to this area of gutter and the device will pull water from both sides of the gutter. This will assist both downpipes. You should also look at running the pipe down the RHS side of that wall section as this should also allow you to drill a small hole (about 28mm diameter) through a decking board for the pipe. Access and fitting will also be much easier. 3in1 Supadiverta. Rainwater Harvesting Best Practice using syphonic drainage. Cleaner Neater Smarter Cheaper Supa Gutter Pumper. A low cost syphonic eaves gutter overflow solution. Re: How to fix overflowing gutter with new Pergola 19May 29, 2018 3:26 pm Nick82 Thanks for the tips, I plan to install it between the door and the window, as that is the most central location where it can be connected to the downpipe. Hi Nick, Just wondering if you have solve the problem? My old house has a similar problem and I am looking for solutions as well. Regards Tom Re: How to fix overflowing gutter with new Pergola 20Jun 04, 2018 1:37 pm Hi Tom, Yes I can happily say it has fixed the problem using a gutter pumper. However you need to regularly clean the inlet in the gutter as it clogs up with leaves easily which blocks the flow. If you also use some gutter guard then I would say this would fix it from blocking up. Is there a building permit? RU in Victoria? What is the value of the building contract? 1 7072 No, I even have sections of narrowness where the tiles won't slide up any further. 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