Life Expectancy Of Built Up Roof

This lifespan makes built up roofing comparable to composition asphalt shingles which last between 15 and 30 years depending on their quality.

Life expectancy of built up roof.

A cedar shingle roof like this one can last up to 40 years if it s taken care of properly. Sprayed polyurethane foam also referred to as spf probably has the longest roofing system lifespan. Built up roofs have between 3 and 5 layers of roofing paper called plies mopped with hot asphalt between each ply. 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. 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. Average lifespan bur roofs typically last from 20 to 30 years.

Fiberglass shingles are more. 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. The roof is normally ballasted by a layer of smooth river stone. 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.

A built up roof can last up to 25 years and is the least expensive of the four flat roof products mentioned here. The material is used for roofs with a very low slope to nearly flat. 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. 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 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. The warranty periods given in the table are for typical manufacturer s material warranties. According to the study metal is expected to last somewhere between 30 45 years after installation. What roofing system has the longest lifespan.

While many types of roofs last longer than 15 years some can hold up well for 50.