A couple months ago we replaced our sidewalk FuturaStone with stamped concrete, so now we can actually see the drips and puddles that have probably been there for 20 years.
Nearly every morning, when the overnight temperature hits the dew point, we have puddles under the gutters at the same two places. I finally climbed up on a ladder for a look at what I thought would be leaky gutters.
The problem appears to be a flaw in our roof construction. Hawaii building code tends to be less stringent than the Mainland because there's no freeze/thaw cycle, and I'm sure that [-]Castle & Cooke[/-] an occasional monolithic MegaCorp builder is tempted to cut a corner or two when they're cranking them out by the hundreds.
I've posted photos below. It looks like our roof rafters have been cut off vertically and the fascia boards nailed flat on them (so they're vertical too). A 1"x2" has been nailed to the top of the outer face of the fascia and the gutters have been mounted right under the lip of the 1"x2". The roof sheathing probably stops right behind the 1"x2" and the paper (on top of the sheathing) comes out to the outside edge of the 1"x2". The composition shingles only stick out about an inch beyond the paper and the 1"x2" over the gutters.
It looks like water condenses on the roof (on the shingles or the photovoltaic panels) and drains down to the edge of the shingles. Instead of dropping off the edge of the shingles into the gutter, however, at these two spots they seem to work their way back up under the shingles (capillary action? holes in the shingles?) to the paper. From there the moisture seems to flow down the face of the 1"x2", turn under its bottom edge to flow to the fascia board, down the fascia board, turn under its bottom edge, and drip onto the sidewalk.
Some mold has grown onto the 1"x2" but the wood is pretty well sealed with paint and it still feels solid. It probably dries every day (the shingles easily hit 100 degrees or hotter), cools overnight, and then gets wet an hour or two before sunrise. The water doesn't seem to get far enough back up the eaves to cause problems with the walls (we've had this stretch of wall open and we'd have seen water damage), so I think the only reason I care about the water flow is because we see the sidewalk puddles.
Aside from the ugly, is there a hidden problem? Is this area supposed to have drip-edge flashing on the 1"x2" to make the water go into the gutter? I could stuff a foot or two of drip edge between the 1"x2" and the paper, and hopefully that would make the water hit the gutter. Any other solutions?
Nearly every morning, when the overnight temperature hits the dew point, we have puddles under the gutters at the same two places. I finally climbed up on a ladder for a look at what I thought would be leaky gutters.
The problem appears to be a flaw in our roof construction. Hawaii building code tends to be less stringent than the Mainland because there's no freeze/thaw cycle, and I'm sure that [-]Castle & Cooke[/-] an occasional monolithic MegaCorp builder is tempted to cut a corner or two when they're cranking them out by the hundreds.
I've posted photos below. It looks like our roof rafters have been cut off vertically and the fascia boards nailed flat on them (so they're vertical too). A 1"x2" has been nailed to the top of the outer face of the fascia and the gutters have been mounted right under the lip of the 1"x2". The roof sheathing probably stops right behind the 1"x2" and the paper (on top of the sheathing) comes out to the outside edge of the 1"x2". The composition shingles only stick out about an inch beyond the paper and the 1"x2" over the gutters.
It looks like water condenses on the roof (on the shingles or the photovoltaic panels) and drains down to the edge of the shingles. Instead of dropping off the edge of the shingles into the gutter, however, at these two spots they seem to work their way back up under the shingles (capillary action? holes in the shingles?) to the paper. From there the moisture seems to flow down the face of the 1"x2", turn under its bottom edge to flow to the fascia board, down the fascia board, turn under its bottom edge, and drip onto the sidewalk.
Some mold has grown onto the 1"x2" but the wood is pretty well sealed with paint and it still feels solid. It probably dries every day (the shingles easily hit 100 degrees or hotter), cools overnight, and then gets wet an hour or two before sunrise. The water doesn't seem to get far enough back up the eaves to cause problems with the walls (we've had this stretch of wall open and we'd have seen water damage), so I think the only reason I care about the water flow is because we see the sidewalk puddles.
Aside from the ugly, is there a hidden problem? Is this area supposed to have drip-edge flashing on the 1"x2" to make the water go into the gutter? I could stuff a foot or two of drip edge between the 1"x2" and the paper, and hopefully that would make the water hit the gutter. Any other solutions?
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