Life Expectancy Of Built Up 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.

Life expectancy of built up roof.

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. Materials and workmanship as well as the weather elements in your location determine the lifespan of a roof. Maximizing the lifespan of a built up roof is accomplished by regular inspection and repair and by keeping debris off the roof to prevent degradation of the surface. Those tree branches are going to be a problem as the shade keeps the shingles from drying out properly which can result in rot and undesirable growths.

More plies means a longer life and a rule of thumb is 5 years for each ply. The roof is normally ballasted by a layer of smooth river stone. Installation costs and lifetime value. Life expectancy of built up roofs 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.

Average lifespan bur roofs typically last from 20 to 30 years. The average lifespan of asphalt shingles ranges from 20 to 40 years depending on the manufacturer although many warranties only guarantee between 15 and 25 years. What roofing system has the longest lifespan. Fiberglass shingles are more.

The material is used for roofs with a very low slope to nearly flat. According to the study metal is expected to last somewhere between 30 45 years after installation. Built up roofs have between 3 and 5 layers of roofing paper called plies mopped with hot asphalt between each ply. Depending on the climate and the specific materials used built up roofing has an average life expectancy of 15 to 30 years but some constructions can last up to 40 years.

You can expect a 4 ply built up roof to last from 17 to 25 years with an average of 20 years. Sprayed polyurethane foam also referred to as spf probably has the longest roofing system lifespan. While many types of roofs last longer than 15 years some can hold up well for 50. The warranty periods given in the table are for typical manufacturer s material warranties.

In general built up roofing tends to fare better in warmer climates than in cold regions.