Garage Roof Replacement: 3 Mistakes to Avoid

roof trusses during construction
  • 48-60 hours
  • Intermediate
  • 2,500-6,000

A garage roof replacement isn’t an easy project to tackle, and it will take some time to complete.

If you do not hire a contractor to help you, you will need to avoid some common mistakes to ensure your final result is structurally sound. Consider the following as you plan and work on replacing your garage roof.

1. Underestimating Asphalt Shingles

person installing roofing

Asphalt shingles are heavy and need to be entirely ripped off the roof. You will also need a dumpster to cart it away. Depending on how many layers are on the roof, it will require both a lot of work and a lot of carting.

It might not sound so bad when you start, but climbing up and down the ladders to pull off the shingles is strenuous work.

Be prepared for a very long job. The more people you can talk into helping you with the garage roof replacement, the better. It would be especially helpful if you can find people who have done it before.

2. Failing to Check the Timbers

Once your roof is clear of the asphalt shingles or whatever covering it had, you will need to check the roofing timbers and replace any that look suspect.

In most cases, the roofing timber should be fine as it is usually the actual roofing sheets that need replacing. However, if in doubt about any particular timber, it is best to replace it now.

3. Doing the Job Without the Right Tools

Men installing roofing

Once the roof is cleared, it's time for the garage roof replacement to be attached.

If you don’t have the proper tools to do the job, you can rent them. It will cut the time and work down tremendously.

Pay attention to keeping the replacements straight, especially if you are replacing with shingles.

Each shingle needs to be nailed into place and has to be straight. Attaching them with an air gun is a lot faster than a hammer and nails.

If you’re doing the garage roof replacement with roof sheeting, it is a lot easier, but you will require at least two people to get the sheets into place.

Remember, if you do not have a head for heights, this is not a job for you to tackle. You will be standing on open trusses, some of which are way up in the air.

If you are using roof sheeting, make sure the overlap is adequate and you use roofing nails with covers every two to three bumps along.

The nails go on top of the bumps, not in the grooves. The water runs along the grooves, so the nails must be out of the reach of the water. Once the roof is in place, you can attach the gutters.