Browse Forums General Discussion Re: Weep holes on ground level after outdoor tiling 5Jan 22, 2016 6:46 am 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: Weep holes on ground level after outdoor tiling 9Jan 22, 2016 2:17 pm 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: Weep holes on ground level after outdoor tiling 11Jul 13, 2021 7:28 pm Hello, we are facing the same issue now, the ground floor has elevated above our weep holes but all the weep holes are under cover and water getting in is minimum unless there is a huge downpour and our gutters overflow. Just wondering what was the solution you did to avoid the water getting into the weep holes. Any advice will be helpful Thanks Re: Weep holes on ground level after outdoor tiling 12Jul 13, 2021 7:44 pm It's a 5 year old thread, extremely unlikely that the OP is still around. You can download the Building Code of Australia which is part 2 of the National Construction Code free of charge. The regs are in there. For compliance,your gutters must be able to drain during a 1:20 year rain event and I very much doubt that you have experienced multiple 1:20 ARIs. What State are you in? 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: Weep holes on ground level after outdoor tiling 13Jul 13, 2021 8:53 pm The floor has been tiled and it's risen above the weephole base. The builder said it's under cover so not to worry, but I am not convinced. I stay in NSW.. Thank you do much for getting back. Builder asked to close the weep holes and open up a new one above it.. so it still allows ventilation and not allow water to get in through weepholes in an event of flooding.. this kind of makes sense but I have no idea what else to do. Thoughts please. Thank you again Re: Weep holes on ground level after outdoor tiling 14Jul 13, 2021 10:46 pm He doesn't sound like a builder to me given that he doesn't understand the purpose of having weep holes. Weep holes are not there for ventilation, they are there to allow water to drain from the wall cavity should there ever be water ingress from above. Advising to close the weep holes and opening others above them is 'advice extraordinaire'. Weep holes are installed immediately above the Damp Proof Course and the prime purpose of the DPC is to stop rising damp. "NCC-BCA V2 Class 1 & 10 3.3.5.8 Damp-proof course (b)The location of a damp-proof course or flashing serving as a damp-proof course, must be not less than... (i)150 mm above the adjacent ground level; or (ii)75 mm above the finished surface level of adjacent paved, concreted or landscaped areas that slope away from the wall; or (iii)50mm above finished paved, concreted or paved areas complying with [i]3.1.3.3(b) (ii) and protected from the direct effects of the weather by a carport, verandah or the like; or (iv)in low rainfall intensity areas— (A)15 mm above finished paved, concreted or landscaped areas; or (B)0 mm above finished paved, concreted or landscaped areas if the damp-proof course is protected from the direct effects of the weather by a carport, verandah or the like".[/i] Given that you are in NSW, you most probably are not in a low rainfall intensity area. A low intensity rainfall area has a 1:20 Average Recurrence Interval of 125mm or less per hour based on an average rainfall intensity of 2.08 mm per minute over a 5 minute duration. What area are you in? If the tiling is above the DPC, it is still not compliant even if you are in a low intensity rainfall area. It also very much sounds like your roof stormwater drainage is not compliant.. If you know your roof space area (roof plan area as seen from above or on a plan), the roof slope (standard is 22.5 degrees) the gutter's cross sectional area (available on the manufacturer's website product specification page) and either your area's1:20 Average Recurrence Interval or, if used instead, your area's Intensity Frequency Duration and the size and number of downpipes used, I can give you some guidance as to your roof drainage compliance or lack of if you want to know. Posting a sketch of the roof area showing lengths and downpipe positions would be excellent and a great help. 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: Weep holes on ground level after outdoor tiling 15Jul 14, 2021 9:39 am Hello Thank you for your reply. We just did a major renovation and went with the builder. Unfortunately we agreed to the tiling without doing our homework. The roof extends to around 1.8m outward (from the wall with the weep hole) and provides the undercover patio. We are in the process of adding an extra downpipe and enlarging the storm water pipes. Hopefully this will keep the gutters from overflowing and prevent water from getting into the covered areas. The gutter overflowed once in March during the flood in NSW - havent seen it overflow since then. We are in north shore. For now that's the best way we can think of to safeguard from water from touching those walls. We dont have the budget to do anything else. we may consider knock down and rebuild in 5 years time but till then we need to do the best we can. Any other tips will be helpful as well. Thanks again Re: Weep holes on ground level after outdoor tiling 16Jul 14, 2021 1:07 pm Thamz We just did a major renovation and went with the builder. Unfortunately we agreed to the tiling without doing our homework. I wrongly assumed that it was a new house. I should have asked. If it wasn't going to be compliant, they should have explained why and not done the work or else looked for an alternative. Is there any slope on the tiling? Thamz The gutter overflowed once in March during the flood in NSW - havent seen it overflow since then. We are in north shore. You are not in a low rainfall intensity area. The 'under cover' regulations are vague because there is no formula that factors applicable widths and heights for wind driven rain but the minimum 50mm gap under cover regulation is set in stone. Eaves gutter compliance needs only to be applicable to a bare minimum 1:20 ARI. The storm you experienced possibly/probably qualified as a 1:20 ARI. Thamz We are in the process of adding an extra downpipe and enlarging the storm water pipes. For now that's the best way we can think of to safeguard from water from touching those walls. We dont have the budget to do anything else. we may consider knock down and rebuild in 5 years time but till then we need to do the best we can. Was the overflowing water isolated to one area? Downpipes are installed in an elongated W pattern, the low points (bottom of the gutter's slope) being where the downpipes are fitted and the gutter slope's high points determining the roof areas that drain to each downpipe. If you fit an extra downpipe, it will be fitted between a downpipe and one of the two high points that service that downpipe. If a gutter overflows on both side of a high point, one downpipe won't do the trick. Digging up and replacing stormwater pipes with larger pipes is an expensive undertaking. For minimal cost, you could simply buy a small rainwater tank of about 1,200 L (good condition used ones come up all the time on GumTree) and plumb one or two of our Gutter Pumpers to the gutter to divert excess water during heavy rain from overflow areas to the tank. This way, the downpipes are not altered and the cost savings would be considerable. A small outlet valve fitted to the bottom of the tank would then divert a limited discharge flow rate through a small pipe (poly or similar) to the stormwater system, usually to the bottom of the downpipe. This is called a detention system. The tank's bottom outlet valve would have the tank immediately draining plus it will drain faster as the tank fills due to the increasing hydraulic head. The above doesn't fix the weep hole issue but it will prevent overflows and is quick and easy to do. As for the weep holes, well...the work is not compliant. 3in1 Supadiverta. Rainwater Harvesting Best Practice using syphonic drainage. Cleaner Neater Smarter Cheaper Supa Gutter Pumper. A low cost syphonic eaves gutter overflow solution. it depends on the natural ground level, if they excavated their boundary wall needed to be built as a retaining wall. If you filled, which sounds like the case then you… 1 7075 I know foam has been around since the 90's and CSR started manufacturing Hebel in 1989, so it's definitely possible 5 5423 You are correct. Just read through all the ncc rules and 75mm is the minimum requirement for me. 4 11155 |