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We were working in Vancouver today and the task was a pan flashing maintenance. Through our work, we modified the detail to be more accommodating. Let me explain. You’ll notice we used 3 lead cover sheets on the right hand side of the skylight. Previous to our work, there were small “sliver” tiles placed in the pan flashing to continue the horizontal row of tiles to the curb (vertical wall) of the skylight. These sliver tiles were in fact counter productive. They were blocking up the pan flashing and acting as dams to collect and stop the debris the rain was washing down the roof.
By not reinstalling these sliver tiles we have now “opened up” the capacity of the pan flashing and the probability of it getting blocked with more debris in the future is now greatly reduced. Waterproofing integrity is still at 100% even without the sliver tiles. We have had nothing but success using this strategy.
We were treating an old APP torch down roof in Vancouver today. Aluminum paint is applied to provide UV protection. Without this protection the roof will degrade at a faster rate then usual. But man… when you paint that stuff on, it is hard to look at! It’s so reflective I wound up squinting all day long. I like to put two coats on so I have gone out and bought a new pair of sunglasses for tomorrow. Hope people don’t think I’m getting an attitude!
Today’s work took us into Vancouver Roofing Company territory. Actually it should be a scaffolding company territory because we were working off a swing stage on the side of a building 9 floors up. WCB would have been proud of us. It was still roofing work we were performing even though we weren’t technically on a roof. More suitably described, in this case, as waterproofing because we were fixing leaks in a membrane gutter. Now we do a lot of rubber gutter repairs. But most EPDM gutters are not as inaccessible as this one was. Like I said… never boring.
We were working on a roofing project in Vancouver when I looked over and saw a worthy blog topic. Ventilation. Adequate ventilation is so important to a roof system and the building structure in general. This roof was clearly installed according to a consultant’s specifications. It was beautiful. 7 black plastic shingle vents, side by side, doing their job providing air flow accommodations for the ceiling space. And there were flat roof vents too! I was in love. Now I wonder why Strata didn’t choose to upgrade the acrylic dome skylights to a more efficient thermal glass unit? I imagine their budget was exhausted on the roof. It was definitely money well spent. Trust Crucial to install your next Vancouver roofing system and we’ll make sure it’s performing to its utmost capabilities too.
EPDM membrane bridgingStaying with the topic of EPDM membrane hidden gutter systems I would like to touch on the topic of membrane bridging. This evolving deficiency occurs on almost all rubber gutter systems. It is due primarily to the fact that the gutter itself was merely loose-laid into the trough and not chemically adhered to the wooden substrate with a bonding agent. Through the lifecycle of the rubber, it dries and shrinks and becomes in non-contact with the underlying deck. This shrinking action results in the pulling-away from the wooden deck and a bridging of the membrane.
The bridging primarily affects the desired water flow of the system to the drain. When a membrane bridges, it causes a rise in the level of the rubber and sometimes builds an obstacle that the water cannot bypass to get to the drain. The end result is a gutter that constantly holds water. This is not an extreme issue of concern if the gutter is installed according to today’s accepted practices. Where this becomes an issue is if the initial installer’s workmanship is failing. Standing water plus poor installation details commonly result in an accelerated fascia board and soffit rot problem.
Extreme cases of membrane shrinkage result in water overflow down the fascia boards instead of the intended flow through the drains and downspouts. Membrane shrinkage can also cause poorly sealed seams to tear apart and become water ingress locations.
Resolution of such bridging problems can be brought about by adding additional drains at critical points or cutting out the extreme bridge locations and patching the resulting cut/hole with appropriate and compatible rubber products applied with accepted and proper means.
If you notice standing water, fascia board and/or soffit damage and are concerned about the cause, contact Crucial Roof Services for a free consultation and estimate.