Lots of reasons: they last longer (some say as long as 100 years!). The snow slides off from them much more easily than a shingle roof. They look nicer, and increase resale value.
Shingles are more energy efficient than metal roofing. Metal roofing has no insulating properties so you would need extra insulation to make up for it. Plus they get hotter in the Summer.
A metal roof will last longer than an asphalt roof. The cost range for a metal roof is about $350.00 to $650.00 per square of metal. However, each tile of asphalt roof would cost around $20 plus installation.
Depending on your location, if the metal roof is going to be more durable and sturdier than your existing roof, you will need a permit. Also if the metal roof is going to heavier than your existing roof, it will require a permit.
Yes you can. You will want to cut back any shingles that over hang the edges. Then put 1x4 slats on 19.2" centers parallel to the ridge of the roof make sure to hit the rafters when you nail down the slats. Do not use treated slats as they will react to the metal. Then screw down the metal the the slats.
yes it should be removed. the new metal roof acts as its own drip edge
The rusting of the metal, the baseball hitting the roof is a PHYSICAL change
A metal roof is roofing material made out of some sort of metal. Most commonly steel but also available in copper, aluminum, and zinc.
how far apart should screws be placed ina metal roof
Standing seam metal roofs are more challenging to repair The first drawback is the difficulty of repairing a standing seam metal roof. Despite their durability, standing seam metal roofs can nonetheless experience damage to their panels. 2. A standing seam metal roof may experience oil canning. Your standing seam metal roof will eventually display signs of oil canning, which initially appear as "bubbling" and then as wavy lines on the metal panels. 3. The standing seam metal roof's noise level The noise level of a standing seam metal roof is the next drawback (and one of the most often requested questions). This isn't a metal roof functionality issue, just like with oil canning. 4. The cost of a standing seam metal roof The cost of a standing seam metal roof is the final drawback (and the one that homeowners are most concerned about). As an illustration, let's contrast the price of a standing seam metal roof with the price of the most popular type of asphalt shingle (architectural) roof. It is my pleasure to answer your question, and I hope that this information provides you with some useful information.
Which metal are you asking about??=Lead coated copper should last over 300 years=
No, the roof is made from tiles, wood and metal.
If installed correctly then yes you can on most systems. This depends on the spacing of your purlins, the type of metal used, the panel style used, the thickness of metal used, and the slope of the roof.