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.

Life expectancy of built up roof.

The roof is normally ballasted by a layer of smooth river stone. 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. According to the study metal is expected to last somewhere between 30 45 years after installation.

In general built up roofing tends to fare better in warmer climates than in cold regions. 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. You can expect a 4 ply built up roof to last from 17 to 25 years with an average of 20 years.

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. 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. Fiberglass shingles are more. The warranty periods given in the table are for typical manufacturer s material warranties.

What roofing system has the longest lifespan. Average lifespan bur roofs typically last from 20 to 30 years. Sprayed polyurethane foam also referred to as spf probably has the longest roofing system lifespan. Installation costs and lifetime value.

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. 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. 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.

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.