Life Expectancy Of Built Up Roof

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.

Life expectancy of built up roof.

A built up roof can last up to 25 years and is the least expensive of the four flat roof products mentioned here. Fiberglass shingles are more. What roofing system has the longest lifespan. According to the study metal is expected to last somewhere between 30 45 years after installation.

A cedar shingle roof like this one can last up to 40 years if it s taken care of properly. 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. In general built up roofing tends to fare better in warmer climates than in cold regions. 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.

You can expect a 4 ply built up roof to last from 17 to 25 years with an average of 20 years. 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. Installation costs and lifetime value. This lifespan makes built up roofing comparable to composition asphalt shingles which last between 15 and 30 years depending on their quality.

While many types of roofs last longer than 15 years some can hold up well for 50. Average lifespan bur roofs typically last from 20 to 30 years. Built up roofs have between 3 and 5 layers of roofing paper called plies mopped with hot asphalt between each ply. Sprayed polyurethane foam also referred to as spf probably has the longest roofing system lifespan.

More plies means a longer life and a rule of thumb is 5 years for each ply. The material is used for roofs with a very low slope to nearly flat. 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 roof is normally ballasted by a layer of smooth river stone.

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.