Installing roofing, no matter who is doing it, requires that the roof be either newly constructed or cleaned of all old materials and roofing nails or screws. The nails can either be pulled out or hammered flush with the surface, but they must not interfere in any way with the new roof’s lying perfectly flat. Before the job of installing metal can begin, the roof must have been checked for weak or rotten areas, in case a new sub roof must be put in place.
If the original roof was single layer off asphalt shingles, installing may not require their removal, the can be installed over them on a frame of one-by fours set at two foot intervals from the crown of the roof to its edges. If, however, the old materials are removed, installing metal roofing to replace them will require rolls of 30-pound roofing felt to be used as a seal for the new roof’s underlayment.
Laying Down Your Metal Roofing
After the first of the panels is in place, the second will be positioned to overlap it by two or three inches, or in the case of ribbed by the width of at least one rib. For the roofing which has “humps” along one of its edges, installing so that the second sheet sits over the hum of the first will ensure that neither water nor snow can creep below the seam.
At the lower edge of the ends of the panel along the edge of the roof itself, there will have to be a strip of metal edging run around the entire perimeter of the roof. Doing this when installing metal roofing will not only provide a professional finish to your roofline; it will seal the edges of the Roofing against birds and insects looking for a place to call home. If your metal roofing is of the humped type, your finished roof will also benefit from the application of a foam rubber strip glued into its gap to a depth of at least three feet, to really discourage unwanted guests.
Installing this also demands that the area along the roof’s crown, where the metal roofing panels meet, be sealed and finished with a metal cap screwed in place to add further protection against water and wind damage.