Built-Up Roofing

In the early 1940s, a new type of roofing membrane was developed in Europe which consisted of layers and layers and layers and more layers of different compounds used to produce an extremely tough and long-lasting roof. The method is still used today, although it has evolved into a system that can be applied inside or out, called “built-up roofing”.
The built-up roofing system consists of multiple layers, each applied one on top of another

There are two main types of built-up roofing. The first type is called “single-ply built up”, which doesn’t refer to a single kind of material, but rather how the membrane is manufactured. All built-up systems use multiple layers of different materials that are built up on top of each other. The individual layers of built-up roofing membranes, both built up and single ply built up, maybe applied inside or outside the building envelope.
“Single-ply built up” membrane is also called “modified bitumen”. It can be made from a variety of minerals, such as coal, limestone, dolospar(R), and talc.

Built-Up Roofing
Built-up roofing

The second built-up system is called “two-ply built-up” or more commonly for use inside the building envelope “built-up roofing”. This membrane uses a different material, asphalt.

Not all built-up systems are built the same, however. The type of material used for insulation and decking depends on what is being built, where it is being built, the climate it will be built in, whether or not parts of the building envelope are exposed to water or weather, and how long the building needs to last.

Regardless of what built-up roofing material is used, whether built up or built-up roofing, all are relatively simple methods to install. Asphalt built-up systems are built in place using separate pieces of rubberized asphalt for each layer while built-up systems are built in place using individual hot or cold-applied materials that are built up layer by layer.

Built-up systems built on the exterior of a building envelope cannot be used in an area where drainage is an issue. They must have a way for water to drain off the roof, usually built with channels or grooves engineered into the membrane itself to allow water exit so it doesn’t pool on the roof. If built-up systems are built with drainage issues, they will be prone to pending water and leakage; if built over waterproofing membranes built-up roofing must include a way for any water that leaks down through built-up roofing to drain freely away from the building.
Built-up systems built inside do not have this limitation, since built-up systems built inside do not rely on gravity to drain water away. This type of built-up roofing is used in both commercial and industrial roofs; it can be built to stand up against any weather condition found inside or out.
As you can see, built-up roofing is a very versatile material that serves many purposes depending on the built-up roofing system built.

built-up roofing client
built-up roofing

What is a built-up roof used for?

A built-up roof is built to last, which means it can be used for many things. They are the roofing material of choice when other roofing options aren’t possible because built-up roofs can be built in places other membranes could not survive; built-up roofs are built to withstand severe weather conditions both inside and out while built-up roofs are also built to stand up against chemicals or leaks.

How long does a built-up roof last?

The built-up roofing membrane itself lasts for decades; built-up roofing membranes aren’t usually the first thing to fail on built-up roofs. Built-up roofs typically fail due to a lack of maintenance or improper built-up roof maintenance that leads to leaks, tears, or missing pieces.

Cost for Built-Up Roof?

Built-up roofs built for commercial buildings will cost more than built-up roofs built as a do-it-yourself project; built-up roofs built inside typically come with a higher price tag than those built outside.

Who installs a Built-Up Roof?

The answer to this question depends on who built the built-up roof, to begin with. Some built-up roofs built do-it-yourself; others were installed by a contractor.

BUR roofing client
BUR Roofing

How is built-up roofing different than built-up roofs?

Built-up roofs and built-up roofing are not the same things: built-up roofs refer to the entire system of built-up roofing built to protect a building envelope, built-up roofing is the actual built-up roof membrane. The built-up roofing is typically built on top of an additional layer that protects against leakage or other types of built-up roofing failure.

How does a built-up roof work?

Built-up roofs built-in layers; adding each new layer adds protection. Built-up roofs built with built-up roofing membranes use hot or cold-applied built-up materials built up in layers to protect the building envelope from the elements above.

What is a built-up metal roof?

Built-up metal roofs are built using heavy gauge steel, copper, or aluminum that’s corrugated for strength and built.

So that covers our article about Built-Up Roofing, for more information you may visit our website at Commercial Roofing Chicago