A built-up roof (BUR), sometimes called a tar-and-gravel roof, is a tried-and-true style of flat roof. Here, alternating layers of roofing felt (usually fiberglass) and hot-applied asphalt are combined to create a long-lasting roof system.

Rocks on roofs, especially on flat or low-slope roofs, serve multiple protective functions that are often overlooked. Here’s a deeper dive into how they help: Shielding Against UV Rays: One of the primary functions of rocks on roofs is to protect the roofing material from harmful UV radiation.

Discover why rocks and gravel are used on flat roofs. Explore their benefits, including protection from UV rays, added weight for stability, and improved drainage. Understand the essential reasons for this roofing choice.

Jun 6, 2024 · Rocks on a roof, especially flat ones, provide protection against weather, UV rays, and can improve drainage, besides holding down the roofing material. There are several reasons why someone might choose to put rocks or gravel on their roof…

Jan 2, 2021 · Built-up roofs or BURs (also called a tar and gravel roof) is a well-established and popular style of flat roof that is made up of alternating layers of roofing felt or fiberglass and asphalt that is applied with heat, which combines to make a long-lasting sturdy roofing system.

Sep 19, 2019 · These small stones are worth more than their weight in the protection they offer for underlying roofing materials and the barrier they provide to external elements like ultraviolet rays and harsh weather elements. Both factors can extend the life of your flat commercial roof and delay repair or replacement.

Sep 16, 2024 · Rocks on flat roofs provide UV protection, improve thermal insulation, prevent punctures, and enhance drainage. Gravel vs. stones: Gravel is cost-effective and provides good drainage, while stones offer aesthetic value but are more expensive.

Jan 20, 1989 · I assume you’re not talking about rocks meaning boulders, but rather the layer of small stones you see not just on gas stations but on many flat roofs. Ideally the stones are river gravel, which has smooth edges and won’t cut into the roof when somebody walks around on it.

Jul 6, 2023 · A built-up roof (BUR), often known as a tar-and-gravel roof, is a tried-and-true flat roof type. To build a long-lasting roof system, alternating layers of roofing felt (typically fiberglass) and hot-applied asphalt are used.

Building roofs often have gravel because it helps protect the roof membranes from UV rays, extreme temperatures, other harsh weather conditions, and physical damage. Gravel is also much heavier than other materials and provides an extra layer of insulation which helps keep the roof’s surface cool in hot weather.