Flyover brackets on flat roof Afternoon all,
Question about patio design. I have a patio approx 4.5m x 6m. The adjoining roof is Kliplock, and is 1-2 degrees. When I moved in the patio sheeting was disintegrating fibreglass and the quad gutter between then roof at the patio overflowed massively. So I re-roofed in laserlite Greca (the most expensive reflective one) and put a 200mm box gutter in. Been in now for 9 years or so.
The problems I've got:
- Polycarb leaks - along the sheet overlaps. Mostly fixed with silicon under the overlaps. Not ideal but I know I would be replacing it eventually. It also appears to come through the screw holes on some sheet, irrespective of the screw tightness (and also replaced the screws to see if this would matter). I'm assuming again that again, the slight depression the screws make coupled with the lack of slope creates a opportunity for leakage.
- Heat retention. It seems like the polycarb adjoining the house and the at side traps the heat in and the lack of airflow means it's hot
I've been thinking of replacing with insulated panel, then elevating over the flat roof to allow the heat to escape, and the insulated panel would also assist in reducing the heat under this area. I've got a few concerns, hoping you could provide some thoughts on:
- Looking at flyover brackets to mount at the roof end. From what I can see they penetrate the Kliplock roof, then you seal around the penetrating using the gusset. How would they go on a flat roof?
- Would the insulated panel with this design provide much heat reduction?
- We do quite like the light coming in through the back area, and have a big concern with the insulating panel blocking the light and then the back area becomes rather dark. Any other options people could think of to improve?
Cheers,
Tom
Do all those leaking screws have the proper soft dome washers?
I am a fan of the airflow you get with using a lifted roof whether with RoofExtenda brackets or something else. A low light transmission skylite or two in the insulated panel might be worth thinking about
"A big boy did it and ran away"
Legal disclaimer denying responsibility to be inserted here.
Grecia is going to leak at the screws due to the very flat roof, its 'flat top' profile, and the slightest dint at the screw will create a pool.
Does the Kliplok flow water onto the polycarbonate, or is there a gutter at the join?
Insulated panel will reduce radiant heat significantly
There's a box gutter between the main roof and patio.
Originally Posted by TomH
3. At 4m depth, not sure there would be a large difference in light if this was solid. You could try to throw a tarp of it to test the difference.
It might be a case of trade off - leak proof, cooler underneath with slightly less light as opposed to the opposite.
2. Insulated panel definitly significantly less heat transfer however you may be able to achieve something simular with that "open" space with roof blanket under a tin re-sheet
1. usually something like Dektite is used for roof penertrations.
Thanks. Good idea about the tarp - I will test. Thought about blanket under sheet, but then I would still have to finish the underside. Insulated panel also has a much better span, so I could actually remove nearly all of the battens and supporting beams. I saw the Decktites - no issue with these with the almost flat Kliplok?
Posting Permissions
LinkBack URL
About LinkBacks
Reply With Quote