How much does it cost to have roofing repairs done?
Apart from a total roof replacement, what are the most common roof repairs? Generally, these would include new shingles over an existing installation (though some areas have regulations or limits on the number of times this is allowed), "patch" work which replaces the plywood and shingles in a small area of the total roof, and resealing seams with cement. There may also be the need for replacing metal "flashing", seals around skylights or chimneys, and even some work where gutters are concerned.
For the purpose of this discussion we will consider the most common of all roof repairs - the replacing of plywood, shingles and flashing when a leak has developed. The average amount of work required usually covers a 10'x10' area. While some homeowners try to make a temporary patch over a leak by using roofing cement, this isn't the most effective approach.
The average materials and prices for this project would include:
- Materials: the average sheet of roofing quality plywood that measures 5/8" thickness is roughly $20. For the project in question, there would be the need for four sheets at a total of approximately $80. A standard square of shingles, which is all that is needed for 100 square feet of roof repair averages at $100 each. There is also the need for roofing nails, which are usually fired from an air-powered nail gun. The standard roll of 1 1/4" galvanized nails costs $65. Lastly, there is the need for roof cement, which is going to cost approximately $22 per gallon.
- Labor: although a roof repair project requires only basic tools, there is more than just basic carpentry for many jobs. For example, if a roof leak has developed because of a structural issue, the average homeowner may not realize this underlying problem. Additionally, if there happens to be chimneys, flashing, skylights or valleys involved in the project, the work is much more complex. This is the reason that most homeowners will hire a carpenter or roofing professional for the work. This will tend to cost between $45 and $75 per hour, depending on the work and the location. Most repair jobs can take two full business days to complete.
Enhancement and improvement costs
- Running all new shingles: mentioned a bit earlier in the discussion, many homeowners opt to run a second or even third course of shingles over existing shingles to manage leaks. According to HomeInspectorLocator.com the cost to install standard asphalt shingles over existing shingles or shakes is going to be around $1.25 to $2 per square foot.
- Skylights: when a skylight develops a leak, it is a bit more costly to tackle the roofing repair. This is because the entire surface area surrounding the light has to be cleared of shingles, a new flashing has to be installed surrounding the fixture, and then the new shingles are installed. Most roofing experts put a price of around $450 for materials and labor on this relatively small area.
- Roof sealant: applying sealant is a great option for preventing future leaks. This typically costs $850-$1000 for a standard roof.
Additional considerations and costs
Underlayment is a waterproofing membrane always recommended to prevent the ingress of moisture and other elements. It also provides weather-proofing until the roof is installed. This can be found at approximately $61 per square or more depeding on its brand and quality. It is required depending on the type of roofing material and slope. Check local codes for requirements.