Browse Forums Building Standards; Getting It Right! 1 Jul 04, 2015 11:33 pm Hi all, Need some advice as to whether my roof is properly installed as I am puzzled why, when I look up at the roof, I see daylight seeping in thru certain sections? The photos below show sections of the roof with daylight seeming to seep through when I look up: http://i1274.photobucket.com/albums/y437/Hootie1/Misc/Screen%20Shot%202015-07-04%20at%209.25.38%20pm_zps8h2vjhcq.png Closeup: http://i1274.photobucket.com/albums/y437/Hootie1/Misc/Screen%20Shot%202015-07-04%20at%209.25.50%20pm_zpsqk5xoziv.png Correct me if I'm wrong, but if flashings are installed in these areas (assuming these areas are where two roof sheets join), shouldn't the flashings sufficiently block out any gaps? My worry is not so much the light coming in but wind and water leaks when raining? Any advice would be appreciated. Our Build Thread: The "Extended" Marina by Visionone Homes Our Inspirations: Frank Lloyd Wright | Houzz Re: Colorbond roof - Light thru roof?? 2Jul 05, 2015 9:27 am That looks fairly common. For a ridge, the flashing is just the ridge cap over the top, and doesn't block the air gap past the corrugations. To be more water-tight you can get ridge capping profiled to the roofing sheet shape, but most don't use it. You can also get foam rubber inserts that fit between the capping and the sheets to seal it up as well. For the ridge, another technique to reduce the risk of water entry is to bend up the bottom edge of the sheet under the cap. But for most roofs with a reasonably steep pitch it doesn't seem to be too much of an issue. Tile roofs have a similar gap between each tile. If you are in an area with common strong wind-driven rain though, it may warrant wanting to seal it up. An advantage of having the gaps there is that it does allow roof space ventilation, to let some hot air out and allow moisture to be released. Re: Colorbond roof - Light thru roof?? 3Jul 05, 2015 9:59 am If you are in a BAL 12.5 area or higher the gap is unacceptable and does not comply with the BAL 12.5 requirements. Sheets should be weathered as per previous post. The valleys of the corrugation get bent upwards to prevent capillary action of water. Re: Colorbond roof - Light thru roof?? 4Jul 06, 2015 11:42 am oneJohn That looks fairly common. Strongly disagree insofar as the middle circle goes. Any roofer who creates a gap that big is not doing his job properly, and has obviosuly cut the sheet too short. If the gap is big enough to let that much light in, you could end up with sparrows or insect nests in there, not to mention sideways rain. FAIL. Re: Colorbond roof - Light thru roof?? 6Jul 06, 2015 8:04 pm Hootie Hi all, Need some advice as to whether my roof is properly installed as I am puzzled why, when I look up at the roof, I see daylight seeping in thru certain sections? The photos below show sections of the roof with daylight seeming to seep through when I look up: http://i1274.photobucket.com/albums/y437/Hootie1/Misc/Screen%20Shot%202015-07-04%20at%209.25.38%20pm_zps8h2vjhcq.png Closeup: http://i1274.photobucket.com/albums/y437/Hootie1/Misc/Screen%20Shot%202015-07-04%20at%209.25.50%20pm_zpsqk5xoziv.png Correct me if I'm wrong, but if flashings are installed in these areas (assuming these areas are where two roof sheets join), shouldn't the flashings sufficiently block out any gaps? My worry is not so much the light coming in but wind and water leaks when raining? Any advice would be appreciated. What type of building is the roof on? A house? No sissalation I see. Re: Colorbond roof - Light thru roof?? 7Jul 07, 2015 8:25 pm Thanks for the comments and advice guys. I've got my SS onto the issue and he will get back to us. The roof is on a house. I couldn't get photos from the top at the moments, but at the height which I managed to get up to, I found a few more issues which I would also like you advice. The first photo is viewing from the front of the house. The pitched roof joins to a flat room behind the pier and we seem to feel that the install needs to be cleaner?: http://i1274.photobucket.com/albums/y437/Hootie1/Misc/Screen%20Shot%202015-07-07%20at%206.14.26%20pm_zpse3jpwuu4.png Issues we spotted - 1) Top circle - flashing install need to be neater? 2) Middle circle - There is a huge gap between where the corrugated roof sheets ends and the flat roof sheet... 3) 2nd circle from bottom - Roof sheet edge needs to be secured? 4) Bottom circle - Gutter dented.... The gap in the roof sheet in 2) could have led to water leaking into the garage ceiling board?: http://i1274.photobucket.com/albums/y437/Hootie1/Misc/Screen%20Shot%202015-07-07%20at%206.14.37%20pm_zpsifm9agpx.png Then there is this...is it normal to have the ridge capping screwed onto the corrugated sheet in this manner?: http://i1274.photobucket.com/albums/y437/Hootie1/Misc/Screen%20Shot%202015-07-07%20at%206.14.11%20pm_zpsylt61olk.png As usual your advice and comments are appreciated. Our Build Thread: The "Extended" Marina by Visionone Homes Our Inspirations: Frank Lloyd Wright | Houzz Re: Colorbond roof - More roof issues... 8Jul 07, 2015 9:35 pm Where is the sissalation? Condensation forms on the underside of tin and drips down the roof battens onto the ceiling. Was sissalation in your building specs for under colourbond roof? Re: Colorbond roof - More roof issues... 9Jul 07, 2015 9:48 pm goody59 Where is the sissalation? Condensation forms on the underside of tin and drips down the roof battens onto the ceiling. Was sissalation in your building specs for under colourbond roof? Hi goody59, Is sissalation like Anticon insulation? I know what you were saying about condensation, but this was not in our building specs. We do not have such a barrier like that as well in our current house. Our Build Thread: The "Extended" Marina by Visionone Homes Our Inspirations: Frank Lloyd Wright | Houzz Re: Colorbond roof - More roof issues... 10Jul 07, 2015 9:51 pm Hootie goody59 Where is the sissalation? Condensation forms on the underside of tin and drips down the roof battens onto the ceiling. Was sissalation in your building specs for under colourbond roof? Hi goody59, Is sissalation like Anticon insulation? I know what you were saying about condensation, but this was not in our building specs. We do not have such a barrier like that as well in our current house. Sissalation is a building paper/foil stuff put under the roof sheets. Re: Colorbond roof - More roof issues... 11Jul 07, 2015 10:00 pm goody59 Sissalation is a building paper/foil stuff put under the roof sheets. No sissalation wasn't mentioned in our building specs. From what I've seen of some of the other builds in WA, they do not have them too, so perhaps only required in some regions? Our Build Thread: The "Extended" Marina by Visionone Homes Our Inspirations: Frank Lloyd Wright | Houzz Re: Colorbond roof - More roof issues... 13Jul 08, 2015 8:35 pm It is a regional thing, In Adelaide most of the builders don't include any sort of roof sarking, and many no wall sarking either. In the first picture, some light can be expected in the joins, and in a photo can it can appear worse than it is, because its in contrast to the dark underside of the roof. The middle one does look quite odd though - you should never be able to look up and see the sky through it, and the light should be quite indirect. The top of the sheets should be in contact with the ridge cap, and there should be significant overlap. In the 2nd one, (1) looks a bit unclear to me. It seems like the flashing was pre-bent, but they've bent it back to make it fit somehow, perhaps something to do with the bend in the vertical sheet. Assuming there's a good overlap there, it shouldn't be a water issue, but worth taking up with the builders. From the picture, number (2) looks like a major problem. All parts of the roof must drain down to a gutter, and there should be no gaps big enough for a bird to get in. Is there some flashing there under the sheet to drain the water to the gutter? Also, the water that runs up against the back of the pier needs to be drained somewhere. Is there a box gutter in there for that? I don't think the last photo is clear enough to see what the issue is there. Re: Colorbond roof - More roof issues... 14Jul 09, 2015 11:23 am Thanks guys, great discussion and points made. At least I learnt what sissalation is now Cheers of the comments oneJohn, they are helpful. The SS is on it. He said that there was still some minor work done to the roof so I'll leave it to him for now and see what happens later. He has all the points and photos in the email to follow up and let us know. I'm hoping that these issues will be resolved because the roof is not something that is visible nor easy to inspect but I am guessing that before handover, I might have to climb up there and have a look around to see if I can spot anything else, just so that we can be assured that the job is done. Our Build Thread: The "Extended" Marina by Visionone Homes Our Inspirations: Frank Lloyd Wright | Houzz Re: Colorbond roof - More roof issues... 15Jul 28, 2015 2:52 pm Hard to see on the photos, but there is a lot of light coming through, if sheets are not back-folded properly you will have wind driven rain leaking straight in, i would definitely recommend installing presstite under flashing, condensation is another issue. I would NEVER build a colorbond house to someone without Anticon, i dont care what the code says in your region, but colorbond is very noisy even when its laid over Anticon, let alone over the roof battens. Good luck sleeping in that house. Builders dont put it as a standard but clients dont want to pay extra, but that is one hell of an upgrade you should of done. Re: Colorbond roof - More roof issues... 16Sep 07, 2015 5:49 pm veseli Hard to see on the photos, but there is a lot of light coming through, if sheets are not back-folded properly you will have wind driven rain leaking straight in, i would definitely recommend installing presstite under flashing, condensation is another issue. I would NEVER build a colorbond house to someone without Anticon, i dont care what the code says in your region, but colorbond is very noisy even when its laid over Anticon, let alone over the roof battens. Good luck sleeping in that house. Builders dont put it as a standard but clients dont want to pay extra, but that is one hell of an upgrade you should of done. Thanks for the comments veseli. Our current house also has colorbond without anticon and we find that it is fine, so maybe we are used to it. Our Build Thread: The "Extended" Marina by Visionone Homes Our Inspirations: Frank Lloyd Wright | Houzz Re: Colorbond roof - More roof issues... 17Sep 20, 2015 7:42 am Hootie I'm so glad you said that - it is something I didn't know of and was a bit worried that we'd made a huge mistake. This building thing is a bit of a minefield! Re: Colorbond roof - More roof issues... 18Sep 20, 2015 8:27 am Hi Hootie Sorry for coming in late one this..I hope the gaps have been rectified , but anticon (sisalation & Insulation) is pretty much mandatory on homes these days in WA..did you have an energy rating done on your new house, if so what is the rating? The reason I am asking is that lately I've seen some energy reports that are completely fictitious and I can assure you the council Building Surveyors and Building Commission would be very interested in such cases. If your designer or builder hasn't provided you with a energy report contact your Council ASAP, get a copy and have it properly checked. BTW NON-COMPLIANCE later on may effect you warranty, insurances, property re-sale ,etc,etc Designer,Engineer (Civil,Const & Envir),Builder,Concrete & Masonry Contract.Struct Repairs Re: Colorbond roof - More roof issues... 19Sep 20, 2015 8:57 am Hi, SBG - how could the reports be fabricated? Aren't they required to gain building permits? Re: Colorbond roof - More roof issues... 20Sep 20, 2015 9:43 am MalSannie Hi, SBG - how could the reports be fabricated? That's a good question I am dealing with one now where 1. The designer copied and pasted the report from another project..ie. Double glazing, wall insulation,etc,etc? 2. An independent Building Surveyor certified it as correct? 3. The client bought the unit off the plans, expecting double glazing, insulation,etc. 4. The project has been been built without double glazing etc. 5. The builder is now refusing to spend $50K/unit to rectify this problem 6. Further more, the owner wants to sell with a 6+ star rating, their investment is now worth less? 7. Possible out come messy litigation, years in the courts... no one wins. MalSannie Aren't they required to gain building permits? They are required but who checks them for accuracy, let alone implements fixes? The average punter gets rolled..but rich people will sue and bankrupt the developers/builders. Designer,Engineer (Civil,Const & Envir),Builder,Concrete & Masonry Contract.Struct Repairs Your house roof does not show rusting other than some surface rust on the flashings. 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