It is only a matter of time until other problems develop. In addition, if the cost of repair is going to exceed 20% of the cost of a new roof, and if the age of the roof is more than half of the expected service life of the material with which it is constructed, you should probably replace it.
How long should a flat roof last for?
How many years does a flat roof last? Most traditional flat roofs are made from either mineral felt or asphalt and will have a maximum life span of between ten and 15 years. Unfortunately though they have a bad reputation due to their propensity to leak or become damaged through pooling water.
What is the average cost to replace a flat roof?
Flat Roof Replacement Cost
Replacing a flat roof costs $3,131 and $9,915 or $6,388 on average. Materials and labor add up to $4 to $13 per square foot. Expect to pay $4,000 to $13,000 for a 1,000 square foot flat roof depending on the material type and need for vents, drains and extra underlayment.
How do you extend the life of a flat roof?
Maintaining and Extending the life of your existing flat roof
- Apply a Polyglass Coating. Applying a Polyglass coating to a roof that is 10 – 15 years old can extend the life of the roof by up to 10 years and increase energy savings. …
- Benefits of a Polyglass Coating. …
- Conduct Frequent Inspections. …
- Maintain Drainage System.
How often should you recoat a flat roof?
Recoating a flat roof should be performed every five years.
The recoating process helps to lengthen the roof’s lifespan. Furthermore, recoating at least twice a decade maintains the rooftop’s heat reflection properties. The process is also important to ensure the roof remains waterproof.
Why are flat roofs so expensive?
Greater Chance of Leaks — Again, the problem with flat roofs is that they’re flat. Even though most are designed with a slight slope, they’re not great at shedding a lot of rain or snow. … For this reason, flat roofs tend to cost more overall than pitched roofs.
How much does a 1600 sq ft roof cost?
The average roof replacement cost is $4,200-6,600 on a 1,600 sq. ft. ranch house using asphalt roof shingles. However, if you use premium materials such as metal, wood shingles, clay tile, etc, the cost of your roof will be at least $9,500 – 16,000.
Are flat roofs more expensive to replace?
Compared to the cost of asphalt shingles, most contractors charge 20-35% more to install a flat or low slope roof. This is because its actually difficult to install a flat roof correctly so that it remains leak free. Out of the total installation cost on a new flat roof, around 70% will be the cost of labor!
How do you maintain a flat roof on a house?
Tips for Maintaining a Flat Roof
- Have it checked periodically. Many home and business owners neglect to inspect their roofs as often as they should. …
- Keep it clean. …
- Trim back nearby trees. …
- Deal with leaks promptly. …
- Watch the weight. …
- Make sure you have a good drainage system in place.
How many layers should a flat roof have?
Most flat roofs have two to four layers excluding a reflective coating.
Do you need stones on a flat roof?
Gravel and pea shingle have two primary purposes on a flat roof; they provide a ‘loading coat’ and they afford UV protection. As ballast, the gravel will help anchor the material underneath and lower the risk of it being blown off in high winds.
What is best covering for flat roof?
Quite possibly the best flat roofing membrane, EPDM is a relatively low-cost flat roof material that offers a number of significant advantages. Clean, straightforward installation, incredible strength, a long lifespan, and a smart finish combine to make EPDM membranes a difficult one to beat.
What is the lifespan of an EPDM roof?
EPDM roof membranes remain stable over time and can have a life expectancy of over 50 years. ** Made from synthetic rubber, EPDM roofing membranes have two primary ingredients, ethylene and propylene, which are derived from oil and natural gas.