Metal, a light colored to rfcleet the suns rays. Have it put down with screws. You may have two problems that will increase the price. Almost all shingle roofs have solid sheeting. Metal should have strip sheeting like you find under cedar shingles. If you put metal over solid sheeting it will sweat and rot in a short time. The other problem, what pitch roof do you have. Any thing flatter than a 4-12 I would not consider Metal. 5-12 and up is better. Installed correctly a metal roof will out last a shingle roof at least 2 times, and maybe 4. As an example I own two houses, one had metal, the other shingles. The metal roof was installed in 1938, the shingle roof was installed in 1947, 1962, 1989 and if I am lucky last 2 more years.References : see above
Metal, a light colored to rfcleet the suns rays. Have it put down with screws. You may have two problems that will increase the price. Almost all shingle roofs have solid sheeting. Metal should have strip sheeting like you find under cedar shingles. If you put metal over solid sheeting it will sweat and rot in a short time. The other problem, what pitch roof do you have. Any thing flatter than a 4-12 I would not consider Metal. 5-12 and up is better. Installed correctly a metal roof will out last a shingle roof at least 2 times, and maybe 4. As an example I own two houses, one had metal, the other shingles. The metal roof was installed in 1938, the shingle roof was installed in 1947, 1962, 1989 and if I am lucky last 2 more years.References : see above