AboutMichael J. Owen Expertise Pretty much anything about roofing, particularly asphalt shingle and metal. Replacing damaged sheathing/plywood etc.
Questions about venting attic spaces.
Experience Twenty years of repair, new roof, roof overs and truss work. Still enjoy "getting on the roof".
Organizations None
Publications Just had my late mothers book published. A murder mystery set in England.
Education/Credentials High school, College graduate in England. Now living in Panama, Central America after living in the U.S. for 25 years .
Awards and Honors None
Past/Present Clients Way too many to list in England, California, Bahamas, Florida and Georgia.
Question Is a California weave valley good in Wisconsin and are metal underliners necessary? I was told that this method is better and that metal valleys heat up too much and actually ruin the shingles.
Answer Hi Mary. I have always insisted that woven valleys are far better than cut shingles if installed correctly. I have had cut lines leak and having to re-seal every two to three years.
As far as a metal flashing goes, I do not think it affects the shingles as it is only usually 16 - 20 inches wide. One thing to watch for is any build up of debris such as leaves twigs etc. as this will cause mold and possible rain water back up the valley.
There is a web site explaining how to correctly shingle a valley but I do not have access to it at the moment as I am away from my personal computer. You could type in "How to shingle a valley" and there should be about a million sites.
Hope this helps.
