Built-up roofing systems, also known by the acronym BUR, have been in use in the United States for over 100 years.  They are composed of alternating layers of saturated felts with fortifying fabrics that each contain bitumen between each layer.  These fabrics, or layers, are called ply sheets, which are normally created in a standard size of about 36 inches in width.  The number of plies in a cross section refers to the number of plies on a roof, so four plies signifies a four ply roof membrane development. This adds strength, resistances, and overall stability to the roof.  Sometimes a base sheet, utilized as the bottom most ply, is mechanically fastened.  Typically, the completed system has either an aggregate surfacing or a granulated surface cap-sheet.  An aggregate surface roof system is generally referred to as “tar and gravel” roof systems.   Recent built-up products incorporate a rigid insulation layer as part of the built-up roofing.   BUR systems are fully adhered if applied directly to roof decks or insulation.

Are BUR systems a good choice for you? Perhaps. Their benefits include excellent waterproofing and equally impressive ultraviolet protection. They don’t require much maintenance, and they can withstand inclement weather for long periods of time. Plus, since gravels and other common materials can be used for surfacing, the maintenance cost is low.

On the other hand, there are a few cons. They frequently can take longer to install, emit hazardous fumes and vapors while being installed, the installation cost can be high, and they can be susceptible to wind and water damage.

When it’s time to protect one of your property’s most important assets, it’s critical to partner with a company that provides superior roofing service, and performed by reliable specialists. At A&H, from the initial introduction to project completion, we’re committed to making your project experience second to none.  Contact us to get started at our offices in Raleigh, Cary, Tampa and Charlotte today!


Project Name: SOUTH AREA GARAGE, BLDG’s #1 AND #2

Manufacturer: Soprema

South Area Garage (BLDG #1) consisted of two (2) different buildings, both with different scenarios. Building #1 had two (2) different elevations but both were low-sloped roofing systems. The upper roof area was a built-up modified roofing system that was installed over a tectum deck while the low section was a built-up modified roofing system installed over a plywood deck. We were too remove the existing roofing system(s) down to the existing decking and install a built-up Soprema roofing system. On the upper section, we encountered various pieces of tectum that needed to be replaced. As for the lower section, when we started removing the existing roofing system, we noticed that the decking was disintegrating due to termites. The “owner” said that the lower section wasn’t being utilized that that it was best that they just demolish this section. The upper section was still acceptable and we completed the roof per the specified specifications.

Size of Roof Area: Low-Slope: 6,200 Sq. Ft;
Project Low-Sloped Square Footage: 6,200 Square Feet
Project Steep-Sloped Square Footage: 3,000 Square Feet
Project Duration: 4-Days
Project Warranty: No Warranty was Applicable
Special Challenge: As we started getting the deck exposed, we realized that termites had overtaken and destroyed all the trusses and sheathing.
Project Photos:


Manufacturer: GAF

Tropical Elementary School was a project that had a general contractor involved as there was new construction as well as renovations. The work included installation of new roofing system and all metal components at the Multipurpose and Generator/Chiller Room and roof replacement at the Building 1 and Canopies and Covered Walkway. New tapered lightweight insulating concrete (LWIC) was installed at most the roof sections per the owner’s request to ensure proper drainage but existing areas that already had adequate slope, we did not need to install new LWIC. These sections did however have excessive repairs needed to the existing LWIC to get it back to sounds condition.

Project Square Footage: 76,000 Square Feet
Project Duration: 3-Months
Project Warranty: 20-Year No-Dollar Limit (NDL) Warranty
Special Challenge: We had to perform extensive repairs to the existing lightweight insulating concrete to get it back to it acceptable state.
Project Photos: