We recently installed a drip edge flashing detail on a tile roof. There is quite the need for this as many times water finds it’s way behind the aluminum eaves trough and stains the fascia board. This is due to inadequate tile overhang and the ability of water to wick up and along the underside of the tile.
The solution is simple although labour intensive. Moving all the tiles out of the way is required and although most tiles are not nailed on an entire tile roof, the first row usually is. This solution has proven effective.
We were up in North Vancouver a couple weeks ago working on a tile roof. There was leakage around an attic space vent so we were going to remove all the plastic vents and replace them each with a standard and matching field tile. This is something we have done many times before and are always successful in the endeavor. But this time it was different. When I got near the vent I noticed an unusual amount of wasp activity. I’m used to seeing 1 or 2 buzzing about and it’s no big deal to me. I can still do my work without issue. But the 6 or 8 I saw this time concerned me. I decided it was best if the home owner had a professional exterminator come out and address what seemed almost certainly as a nest before I progressed further. Well he did his work in the attic not knowing what he was fighting. I was told he found no visible nest “hanging” around the attic some where. So the pros sprayed some chemical and when it gets warm the wasps are attracted to the spray and then they die. There’s probably more to it then that but that is the basics. We returned to do our work a week or so later. WELL HOLEY CRAP… LOOK WHAT WAS UNDER THE TILES. That’s the Death Star of wasp nests. Boy am I glad I made the decision to get the professional exterminators in! Crucial Roof Services.
Concrete tile roofs are supposed to be installed with a minimum 3″ “headlap”. That is the lap distance from row to row. When that 3″ lap is not maintained, and especially on a lower sloped roof, a common problem is that of wicking. The water wicks up the underside of the top tile, past the top edge of the tile below, and drips onto the underlayment. Now one tile by itself doing this is not a big concern. But when an entire face of tiles is wicking it can add up to a substantial ingress. This is what was discovered today in Burnaby. The only resolution is to increase the coverage of the surface below by installing 6″ flat stock metal all along the lap…. for every row of tilers! Thereby we are extending the tile coverage to about 4″. Amazingly this works and relieves the home owner of the daunting task of re-doing the whole roof with adequate headlaps.