How to Repair an Asphalt Shingle Roof

      Remove nails               Replace shingle             Nail in place

Replacing a damaged shingle:

  1. Use a flat pry bar under the shingle to break the seal.
  2. Remove the roofing nails that are holding it in place.
  3. Slide out the old shingle.
  4. Nail a new one in place, making sure the nails are covered by the shingles above.
  5. Replace any nails you removed from the shingles above the damaged one.
  6. Reseal the shingle tabs with roofing cement and coat any roofing nails.

      Remove nails             Take out old vent           Attach new vent

Replacing a damaged roof flange:

  1. Remove the shingles around the vent.
  2. Pull out any nails that are holding the flange in place.
  3. Slide the old flange up over the pipe.
  4. Nail a new flange in place.
  5. Reattach the shingles around it.
  6. Bend the lead casing over the inside of the vent pipe to keep water from running between the pipe and flange.
  7. Flanges are also available with a rubber gasket that seals around the outside of the pipe.

                  Remove rust                                 Paint flashing

Repairing roof valleys:

Be sure to clean roof valleys regularly. If the valleys are rusty, clean them with a wire brush and apply rust inhibiting paint.


As they age asphalt shingles can become more brittle and less flexible. That means that if they’re blown up by strong wind, they may break instead of snapping back afterward. Each of these tabs is actually only a third of a complete single and if possible it’s best to replace the whole thing instead of just one tab.

To do this you’ll need to lift up the tabs of the damage shingle and the once above it so that you can remove the nails. Once the damage shingle is free you can replace it with the new one of the similar color and style. Don’t forget to replace the nails from the course above when you nail in the new shingle and cover any nails or nail holes with the glove of roofing cement.

It’s not a bad idea to stick the tabs down with a little of this sticky stuff. Roof jacks around plumbing vents can simply ware out overtime but sometimes they get a little help from neighborhood squirrels who like to sharpen they’re teeth on the lead lees. Replacement is the best solution here and that begins with removing the shingles that lap over the vent base so that you could take off the damage vent and replace it with the new one of the same size.

Nail down the upper side of the vent base and replace the shingle above it, if the shingle is damage you’ll have to notch a new one to take it’s place. The valleys were two planes of the roof meat, often catch leaves and debris and when they do the flow of water is slow down that can create a damage effect and force the water back up under the shingles. So it’s important to keep this area clear sometimes this valleys are covered with metals and if they loss they’re coating they’re beginning to rust and a leak wont be far behind.

A scraper or wire brush will remove the rust but you’ll also want to clean the middle so that you can recoat it with a rusted inhibiting pain to protect the metal taken old care to match the shingles that go a long way in making the roof look better from the street.


  1. what was the name of the poly product used in repairing concrete (side walks -driveways were cement has chipped out) as shown on your show sometime ago look like it was easy to use just brush it in till it is smooth and than moisten and it sets up perfect and blends well –thank you Ld

  2. I really like your video. I watched a similar video where the installer layered to vent jackets over one another. I really like your way better. It look like its done professionally. Thanks again

  3. Curling shingles happens from poor roof ventilation or a dry asphalt shingle base.
    Metal roofing contractors specialize in the installation of metal roofs; asphalt shingles
    are installed best by roofing contractors
    that specialize in shingling and so on and so forth with wood, tile, clay and slate.
    As such this leaves little room to negotiate for discounts.

  4. This is great information if you only need to repair the surface materials. It is best to get a professional roofer’s inspection to ensure there is not more serious damage with the roof decking.

  5. Hail damage in some cases is not immediately apparent and may become more evident in the months to follow. Often a buckled shingle is mistaken for wear an tear when in fact it is the result of severe weather. In such cases, the shingle(s) will continue to shift and
    deteriorate over the next few weeks and months to follow. In many of these situations homeowners have already been denied by their
    insurance companies because they may have called their insurance company to soon. You should contact your local roofing company to inspect your roof and property and if any damage exists you can schedule a re-inspection with your insurance company and get the denied claim reversed and approved no matter how old or new your existing roof may be. DO NOT attempt to evaluate the damage yourself as most homeowners cannot differentiate hail damage from normal deterioration. Hope this helps…

  6. The first and easiest way to evaluate your roof’s condition is to grab a flashlight and head up to your attic. Make sure you grab a flashlight with a bright beam so you don’t miss any damage and always be sure to be safe as you perform these kinds of inspections. Once you have performed an interior roof check, it is also a good idea to take a look at your roof from the outside. Interior roof checks are essential because they will help you identify roof damage that has already reached the interior of your roofing structure.

    Exterior roof checks, however, are money-savers because they can help you to identify “roof damage” before it actually becomes real roof damage


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