We need to replace a residential roof with 3D curves in the next 12 months. The house was constructed in 1923, and is described as a dutch cottage. The house is a flat-toped A-Frame, with curved dormers, like that of a perky breast. The lot has moderate shade. I live about 40 miles from the house, but will try to post a photo in the next week or so.
To date, cedar shingles have been used. The curved areas require that wood shingles be steamed or soaked to prevent breakage. The current cedar roof is 25-30 years old. I believe the shingles were special ordered from Canada, but could be mistaken.
We have contacted a local roofer, but have no way to really know if he and his crew are up for this journey. He has commented that we may want to consider other materials (e.g. metal), as the quality of cedar has declined, and the job requires so much craft, that a re-shingle every 15 years is not particularly desirable.
Does the quality of cedar shingles vary? If so, who sells the shingles that will last the longest?
Can we extend the life of cedar via use of coatings?
Do you know of any companies/consultants that specialize in such roofs?
Do metal roofs require significant modifications to the structure?