Life Expectancy Of Built Up Roof

More plies means a longer life and a rule of thumb is 5 years for each ply.

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

The warranty periods given in the table are for typical manufacturer s material warranties. 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. Average lifespan bur roofs typically last from 20 to 30 years. Installation costs and lifetime value.

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. Materials and workmanship as well as the weather elements in your location determine the lifespan of a roof. 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.

The material is used for roofs with a very low slope to nearly flat. Built up roofs have between 3 and 5 layers of roofing paper called plies mopped with hot asphalt between each ply. 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. This lifespan makes built up roofing comparable to composition asphalt shingles which last between 15 and 30 years depending on their quality.

A cedar shingle roof like this one can last up to 40 years if it s taken care of properly. The roof is normally ballasted by a layer of smooth river stone. While many types of roofs last longer than 15 years some can hold up well for 50. 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.

Fiberglass shingles are more.