Roofing repair is a common, annoying necessity. With the sun’s heat, shingles (and a roof in general) will expand. This leads to nails popping out, which can leave holes for leaks. If you’re new here, leaks = bad. Read on for some basic steps on replacing a roof.
When you are repairing roof tile, consider renting a nail gun. Nail gun rental can cost around $20 a day, which can save you the time of hammering. Worth it!
Pro contractors, Georgia Pacific, released this video for specs and detailed instructions on laying sheathing and spacing for nails. This can differ depending on the spacing of your rafters. Also take into account nail length you will need to pierce through the necessary layers. According to IKO, “Roofing nails should be long enough to penetrate the roofing material and go 19 mm into OSB, solid wood, plywood or non-veneer wood decking, or through thickness of decking, whichever is less. To determine the nail length, you should consider the number of layers of shingles, shingle thicknesses, underlayment and flashings (installed on eaves, sidewalls and valleys, etc.).” Long story short, you still need to look into specifications for your particular roof.
1. Repair Your Sheathing
Begin by clearing any debris or leaves from your roof. Depending on your issue, you might need to repair or lay down new sheathing. Lay down your sheathing (also known as decking), which is usually half inch thick plywood, 8 feet long. This is standard. Obviously every roof is different and you might have to cut your sheathing to fit your roof’s measurements. Once you have your sheathing measured and cut, nail it to your roof’s rafters. Lay your sheathing in a brick pattern; this will give your roof extra strength. See Figure Below.
2. Lay Down Felt Paper
Felt paper is what sits between your shingles and your plywood sheathing. Staple your 6 inch starter strip of felt paper at the bottom of the roof, near the gutter. Leave 1 inch to overhang over the roof. This helps weather elements to drain off the roof into the gutter. Just like you will do with your shingles later, overlap the felt paper with about two inches over the piece of felt paper below it. Make sure to reinforce the tar adhesive strip on each piece of felt paper with nails.
3. Install Shingles
You can’t reshingle your roof without shingles! Figure out if you are repairing roof tile (usually clay, ceramic, or wood), asphalt shingles (also known as composite or 3 tab), or architectural shingles (also known as laminate). Lay your shingles starting at the bottom corner of the sloped roof with your starter course. Work your way to the top, overlapping the top shingles over the row beneath them. This will make it so precipitation doesn’t penetrate the roof and lead to damage. Work out from the bottom corner in a pyramid shape. Six nails along the tar strip of each shingle should be adequate for utmost performance and hold. Work from the bottom up, building from your original pyramid shape.
If you are doing roof shingle repair for an isolated part of your roof, perhaps a part where the shingles were damaged, don’t remove the old ones, just nail the new on top of them. This leaves a consistent, smooth look.
If you’re trying to do roof repair in winter, read this article for some extra tips. If not, still read it!