Low-Sloped Roofing

A roof that is nearly level or slightly pitched is called a low-slope roof. No roof should be dead level flat; it should have at least a slight slope to drain. Problems in low-slope roofs are more common and more difficult to diagnose than pitched roof problems because the path of water leakage through flat roofs is often quite hard to trace
This is why a McRae Roofing we use cutting edge technology, as well as the best trained people to solve you leak issues.

Built-up Roofing


Built-up roofs are composed of several layers of roofing felts lapped and adhered together with bituminous material and protected by a thin layer of gravel or crushed stone.
Built-up roofs vary greatly in life span, but those used in residential buildings usually last about 20+ years, depending on their quality of installation, exposure, number of plies, and the adequacy of their drainage. Because built-up roofs are composed of several layers, they can contain moisture in the form of water or water vapor between layers.
Moisture not only accelerates deterioration, it can also leak into a building. Look for cracking, blistering,  alligatoring, and wrinkling, all of which may indicate the need for roof replacement or repair. Contact McRae roofing Inc. for a further evaluation if you are in doubt.

Test: An infrared can be used to detect areas of moisture in built-up roofs. Once located, these areas can be more thoroughly checked with a moisture meter or core sample. Such tests must be performed by a trained roofing inspector and are normally used to determine areas that need replacement on very large roofs.

Single-ply membrane roofing


A single-ply membrane roof consists of plastic, modified bitumen, and synthetic rubber sheeting (EPDM)  that is laid over insulation or a wide range of substrates, usually in a single ply and often without a top coating to protect it from ultra-violet light degradation.
Single-ply roofs are installed in three basic ways: fully adhered, mechanically attached, and loose laid with ballast. If properly installed and properly maintained, a single-ply roof should last 15-20 years. Roof penetrations and seams are the most vulnerable parts of single- ply membrane roofing and should be carefully checked. The material is also susceptible to ultraviolet light deterioration.

Check carefully for surface degradation on a single ply roof and thinning top layer that has exposed the reinforcing scrim. Check also for signs of water ponding and poor drainage.

We suggest that you inspect all of you low sloped roofs at least once a year,  two times a year if possible, and hire a qualified roof technician to investigate any leaks observed as soon as possible