How To Install Corrugated Metal Roofing Over Shingles. An asphalt shingle roof which costs $3 to $7 per square foot installed. Repeat on the other side of the roof.
Snap lines on either side and install the caps. Under the shingles, at the edge, the flashing would, should, get nailed down and slightly bent down and nail under the corrugated metal. It attaches in the same way as your eave edging, except that you use roofing screws to face screw the rake flashing.
Table of Contents
 Use A Nail Gun Or Nail And Hammer To Secure The Felt To The Plywood Underneath The Shingles.
Begin laying the metal sheets from the bottom to the top of the roof. Metal roofing installation costs $6 to $12 per square foot installed vs. A panel hemming tool, to fold the downward end of each metal panel and hook it under the offset flashing.
Install The Rake Edging Over The Underlayment.
If you currently have an asphalt roof and need to replace it, you may have an option of installing a metal roof over shingles. Spacing is also half an inch for this. Use a one ¼ roofing nails to attach your metal edging.
The New Row Should Overlap The First Row By Several Inches, As Well As Overlapping On The Sides.
Apply caulk or roofing sealant seam tape at each junction to properly seal the roof. The gable flashing must overlap the flashing of the drip edge flashing at the edge. Begin the next row of panels by caulking across the top of the existing panels.
Because Asphalt Shingles Are Routinely Exposed 5 In., Rip Down The First Strip (The Starter Course) So That It Is 5 In.
Then lay it over the original (old) first course so that the strip is flush against. Their job is on the line and anything against code, or common sense, could come back and bite them on the butt. This is what it looks like when you install a steel shingle roof system over an existing asphalt shingle roof.
For Gable Roofs, Place The Metal Sheet At One Corner Of The Roof, Overhanging The Edge By 2 Inches.
It may help to attach a string along the eaves to serve as a layout guideline for the overhang. Installing a metal roof over shingles. This framework has three big advantages.