Browse Forums General Discussion 1 Apr 23, 2020 10:31 pm Our garage was seriously leak after 9 months living in our new home. The builder fixed the leak by adding the white down pipe. but the gaps of the color bond roof were left open. The builder said that "There is a moulded sealer which is installed under the flashing you are looking at to stop water. You don’t seal the outside as it will not look good." Is he correct? Like ⋅ Add a comment ⋅ Pin to Ideaboard ⋅ Like ⋅ Add a comment ⋅ Pin to Ideaboard ⋅ Like ⋅ Add a comment ⋅ Pin to Ideaboard ⋅ I am worry about the leak again if no seal gaps on color bond roof. Can anyone explain to me why no need to seal the gaps? Many thanks. Re: Why no need to seal the gaps on the color bond roof? 2Apr 23, 2020 11:11 pm Hi westbourne I explained it in your other post but just in case you missed it. "You never silicon where you have indicated. Underneath the flashings the roof sheet is turned up which prevents water from being wind driven up off the end of the sheet" Gravity and the turn up prevent water getting through where you mentioned. Accessible Carpentry & Cabinets accessiblecarpentry@gmail.com accessiblecarpentry.com.au https://www.facebook.com/pages/Accessible-Carpentry-Cabinets/583314911709039 Re: Why no need to seal the gaps on the color bond roof? 3Apr 24, 2020 12:40 am chippy Hi westbourne I explained it in your other post but just in case you missed it. "You never silicon where you have indicated. Underneath the flashings the roof sheet is turned up which prevents water from being wind driven up off the end of the sheet" Gravity and the turn up prevent water getting through where you mentioned Hi Chippy, Thanks so much for your explanation. Re: Why no need to seal the gaps on the color bond roof? 4Apr 24, 2020 9:58 am London to a brick, that downpipe was already there but look where it would have discharged to prior to them fitting the spreader after the fact! 'If' the downpipe wasn't there, then the excess water would have overflowed from the upper gutter in sheet form and then communicated with the strong winds on the day your garage had the 'waterfall' feature inside the garage. If the wind direction was towards the top of the roof's slope, most of the water (if) overflowing from the upper gutter would have been blown away from the garage roof. The 'experts' who the builder sent out to examine for cause as detailed in your first thread on this subject were in the builder's pocket and you were treated like a mushroom! 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: Why no need to seal the gaps on the color bond roof? 5Apr 25, 2020 5:32 am westbourne have you checked there is actually a moulded sealer installed between the roofing sheets and the flashing? I reckon Rawson Homes is just fobbing you off you with BS and there is none installed. It appears this is their standard approach with customers for such such issues. 2 months ago the picture they provided you from the NSW Guide did not show any moulded sealer, nor did they mention it. Other more experienced forum members have advised such sealers are not necessary if the roofing Sheet and flashing interface is constructed properly. Moulded sealers can help, and are suggested in Standards handbook 39, however they are not mandated by the National Construction code and it’s referenced standards. Re: Why no need to seal the gaps on the color bond roof? 6Apr 25, 2020 11:08 pm Thank you very much for your advice. I have emailed Rawson Homes to peace of my mind to seal the roof for hurricane safety. Cheers Re: Why no need to seal the gaps on the color bond roof? 7Apr 25, 2020 11:12 pm Norfolk @westbourne have you checked there is actually a moulded sealer installed between the roofing sheets and the flashing? I reckon Rawson Homes is just fobbing you off you with BS and there is none installed. It appears this is their standard approach with customers for such such issues. 2 months ago the picture they provided you from the NSW Guide did not show any moulded sealer, nor did they mention it. Other more experienced forum members have advised such sealers are not necessary if the roofing Sheet and flashing interface is constructed properly. Moulded sealers can help, and are suggested in Standards handbook 39, however they are not mandated by the National Construction code and it’s referenced standards. I do not know how to check if there is a moulded sealer installed between the roofing sheets and flashing. Can you please tell me how to check it? Thanks. Re: Why no need to seal the gaps on the color bond roof? 8Apr 25, 2020 11:15 pm SaveH2O London to a brick, that downpipe was already there but look where it would have discharged to prior to them fitting the spreader after the fact! 'If' the downpipe wasn't there, then the excess water would have overflowed from the upper gutter in sheet form and then communicated with the strong winds on the day your garage had the 'waterfall' feature inside the garage. If the wind direction was towards the top of the roof's slope, most of the water (if) overflowing from the upper gutter would have been blown away from the garage roof. The 'experts' who the builder sent out to examine for cause as detailed in your first thread on this subject were in the builder's pocket and you were treated like a mushroom! Thank you very much for your advice. I have emailed Rawson Homes to peace of my mind to seal the roof for hurricane safety. Cheers Re: Why no need to seal the gaps on the color bond roof? 9Apr 26, 2020 12:05 am westbourne SaveH2O wasn't saying that you need to get the roof siliconed up for hurricane safety. He was simply stating that your issues were as a result of the inadequate downpipe measures, most likely the lack of spreader. I appreciate that you are cautious because of your earlier experience but as long as the builder has followed standard construction standards and turned up the end of those sheets there is absolutely no need to silicone along that flashing line. Accessible Carpentry & Cabinets accessiblecarpentry@gmail.com accessiblecarpentry.com.au https://www.facebook.com/pages/Accessible-Carpentry-Cabinets/583314911709039 Re: Why no need to seal the gaps on the color bond roof? 10Apr 26, 2020 7:06 am westbourne, you already have a thread discussing this subject which has information that includes climatic records that show the weather conditions on the day your garage flooded were within the roofing design performance requirements despite the builder's claim that the weather exceeded those requirements. I have linked the original thread below for the benefit of readers not familiar with same. viewtopic.php?f=1&t=98103 I fully understand you apprehension given that Rawson Homes has advised you that you can expect the same to happen again in similar weather but that 'advice' in my opinion was testament to reluctance by the builder to admit fault. Given that the upper roof drainage diverting to the lower garage roof has since been modified, it is poor form for Rawson Homes to not explain to you the reason for that modification. The two threads also highlight another common industry failing in that building surveyors accept the plumber's Certificate Of Compliance as proof of compliance without having any requirement to check for compliance and this regulatory deficiency isn't restricted to plumbing. It must be remembered that building surveyors and site supervisors will rarely if ever be appropriately qualified to properly supervise workmanship and/or check compliance for all trades. I will also state again in this thread as per advice given in your first thread that the NCC's Performance Requirements have hierarchy over the Standards and are the minimum requirement. 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: Why no need to seal the gaps on the color bond roof? 11Apr 26, 2020 6:05 pm chippy @westbourne SaveH2O wasn't saying that you need to get the roof siliconed up for hurricane safety. He was simply stating that your issues were as a result of the inadequate downpipe measures, most likely the lack of spreader. I appreciate that you are cautious because of your earlier experience but as long as the builder has followed standard construction standards and turned up the end of those sheets there is absolutely no need to silicone along that flashing line. Don't you think it may leak again in a heavy thunder storm if the roof is not completely sealed? Re: Why no need to seal the gaps on the color bond roof? 12Apr 26, 2020 6:37 pm No I don't think it will leak. The whole reason you had the leak was the lack of spreader from the upper roof. The volume and pressure of water that would have come down that pipe right at the top of the flashings would have had far more force behind it than any wind driven event and will be the sole reason behind the leak. Now that they have installed the spreader the rest of the roof and flashings can perform as they were meant to. As long as the rest of the roof envelope followed the design drawings I posted on your other thread you will be alright. Accessible Carpentry & Cabinets accessiblecarpentry@gmail.com accessiblecarpentry.com.au https://www.facebook.com/pages/Accessible-Carpentry-Cabinets/583314911709039 I would probably definitely consider contrasting out garage door (e.g. light ash would look great) and make downpipes and fascia same colour as your walls, not as your… 1 3573 I need to replace the worn mohair seal on my sliding window, but I can't get access to the end to slide the old one out & push the new one in. I could probably rip the old… 0 5199 4 14301 |