A typical commercial flat roof membrane should last on average 20 25 years before needing to be replaced.
Life expectancy of asphalt gravel flat roof.
The expected lifespan of a built up and gravel roof often called just a gravel roof is 20 to 30 years in florida with an average of 25 years.
American society of home inspectors.
The weatherproofing aspects of the gravel embedded in the roof can prevent degradation like cracking or blistering that lead to leaks or other failures over time.
They are used on the majority of homes today and are usually the option that most homeowners choose.
Asphalt shingles last 15 to 30 years.
Another option would be the rubber roofing.
The average lifespan of asphalt shingles ranges from 20 to 40 years depending on the manufacturer.
Asphalt shingles are the most common of roof shigles and they have been around since the 1920s so they are an enduring roofing material.
Flat roof life expectancy.
Which is a less expensive option on flat roofs and only lasts around 10 years.
Asphalt cover has two felt layers added with molten asphalt toping it off with a gravel coating.
The average lifespan of asphalt shingles ranges.
The material is used for roofs with a very low slope to nearly flat.
This depends on the climate quality of the installation type of membrane maintenance and roof penetration.
The asphalt coverings have two layers of felt in a combination with molten asphalt then it is topped using a coating of gravel.
On the shorter end it could need replacing in 10 years and on the longer end it could last even 50 or more years.
A rule of thumb used by some roofers is to estimate that the typical life expectancy of a built up roof will be 5 x the number of plies installed.
Asphalt shingles are inexpensive low maintenance and easy to install but tend to be less resistant to wind and strong rain than other materials.
It is not uncommon for a well installed built up roof covered with tar and gravel for protection from sunlight and properly drained to last for 40 years.
The gravel is embedded into the top coat of asphalt known as a flood coat which helps the gravel stay in place.
The average lifespan for flat roofing systems depend on the materials used.
They tend to have a lifespan of around 20 to 25 years depending the location and the structure of the rest of the property barring any major natural disasters of course.
