David Kirkpatrick
08-29-2011, 03:23 PM
My camp roof is currently being shingled with architectural shingles and drip edge. There are many sections where water is goes from the drip edge onto the shadow board and fascia. In a few places it's a waterfall and streams along the fascia but I can't tell if it's wicking up into the soffit area.
I think the issue is due to improper placement of the shingles on the drip edge i.e not extended past the drip edge enough. After poking around the net quite a bit I found many roofing forums, business sites and this site that discuss drip edge and the placement of shingles over the drip edge, for example, Certainteed Shingle Applicators Manual, GAF, Asphalt Roofing Manufacturers Association and this site.
The general consensus seems to be that shingles should extend over the drip edge by 1/4 to 3/4 of and inch depending on the roof pitch and area of the country. The camp is in the western mountains area of Maine, Oquossoc/Rangeley and I figured 1/2 shingle overhang would be right for the area. The contractors implementation was quite short of 1/2 and I feel an issue so I'm posting to ask about it and how to resolve the issue.
The possibilities are:
1/ Contractor takes out the lower course and reinstalls them to 1/2 over the drip edge.
2/ insert a second drip edge 1/4 to 1/2 away from the existing drip edge.
3/ insert a 3-6 inch section of single shingle between the drip edge top and the existing shingle to get the 1/2 inch past the drip edge.
I'm not about the options so asking for advice.
I'll add that the contractor obviously thinks the way it was done is fine. I asked a local roofer how he did the roofs he has done. He said he did not extend shingle over the drip edge. He said his farther always extended 1/4 inch. While in town today I stopped where a contractor was doing a roof and he said the roof he was doing got a 1/4 inch overhand over the drip edge and that's the way he does all roofs.
Below (I hope) are pictures of the roof with some explanations:
Rain off the drip edge:
http://www.kedawei.com/use/rain2.jpg
Edge alignment:
http://www.kedawei.com/use/alignment 1.jpg
http://www.kedawei.com/use/alignment 4.jpg
http://www.kedawei.com/use/alignment 5.jpg
Bow in the drip edge. The drip edge was high over much of the front porch. I could bang down some of the length but one section would not go down. There is either a high spot under it or it was started cocked and pulled in later causing it to lift. The drip edge in 1/2 of the front section is very tight to the shadow board behind the drip edge. The contractor said he had his ladder leaning against the drip edge when it was installed which might have caused the issue.
http://www.kedawei.com/use/bow 1.jpg
The stained areas are from prior years. The existing roof had cedar shingles under the first course and were worn or split letting rain get right to the shadow and fascia.
I know it's a lot of pictures but for many prior posts I've read there is generally a lack of pictures so...
I have another question about workmanship I'll post in another thread as this one is lengthy as is.
Any comments about the issue and how to resolve it properly would be appreciated.
David
I think the issue is due to improper placement of the shingles on the drip edge i.e not extended past the drip edge enough. After poking around the net quite a bit I found many roofing forums, business sites and this site that discuss drip edge and the placement of shingles over the drip edge, for example, Certainteed Shingle Applicators Manual, GAF, Asphalt Roofing Manufacturers Association and this site.
The general consensus seems to be that shingles should extend over the drip edge by 1/4 to 3/4 of and inch depending on the roof pitch and area of the country. The camp is in the western mountains area of Maine, Oquossoc/Rangeley and I figured 1/2 shingle overhang would be right for the area. The contractors implementation was quite short of 1/2 and I feel an issue so I'm posting to ask about it and how to resolve the issue.
The possibilities are:
1/ Contractor takes out the lower course and reinstalls them to 1/2 over the drip edge.
2/ insert a second drip edge 1/4 to 1/2 away from the existing drip edge.
3/ insert a 3-6 inch section of single shingle between the drip edge top and the existing shingle to get the 1/2 inch past the drip edge.
I'm not about the options so asking for advice.
I'll add that the contractor obviously thinks the way it was done is fine. I asked a local roofer how he did the roofs he has done. He said he did not extend shingle over the drip edge. He said his farther always extended 1/4 inch. While in town today I stopped where a contractor was doing a roof and he said the roof he was doing got a 1/4 inch overhand over the drip edge and that's the way he does all roofs.
Below (I hope) are pictures of the roof with some explanations:
Rain off the drip edge:
http://www.kedawei.com/use/rain2.jpg
Edge alignment:
http://www.kedawei.com/use/alignment 1.jpg
http://www.kedawei.com/use/alignment 4.jpg
http://www.kedawei.com/use/alignment 5.jpg
Bow in the drip edge. The drip edge was high over much of the front porch. I could bang down some of the length but one section would not go down. There is either a high spot under it or it was started cocked and pulled in later causing it to lift. The drip edge in 1/2 of the front section is very tight to the shadow board behind the drip edge. The contractor said he had his ladder leaning against the drip edge when it was installed which might have caused the issue.
http://www.kedawei.com/use/bow 1.jpg
The stained areas are from prior years. The existing roof had cedar shingles under the first course and were worn or split letting rain get right to the shadow and fascia.
I know it's a lot of pictures but for many prior posts I've read there is generally a lack of pictures so...
I have another question about workmanship I'll post in another thread as this one is lengthy as is.
Any comments about the issue and how to resolve it properly would be appreciated.
David