Low Pitch Roof Systems

Low Pitch Roof Systems

Changing the roof on your home is a major decision, but you should also consider its effects on other parts of your home. Low pitched roof systems are a good option for homes with long rafters and low ingress points for rainwater. However, if you’re planning on making a significant change to the roof, you must seek permission from your local planning authority first.

Single-ply roofing

Single-ply low pitched slate roofing systems have a number of advantages. First of all, they are easy to maintain and monitor. This is a major benefit compared to traditional gravel or asphalt systems. Another benefit is that single-ply roofs tend to have better seals because of their standardized, large membrane sheets. The reinforcing fabric also contributes to the durability of single-ply roof systems.

There are several types of single-ply roofs, and each has its own strengths and weaknesses. For example, TPO is the most common type of single-ply roof system for commercial applications. It is the most cost-effective option among heat-weldable materials and is highly reflective, helping to reduce air conditioning bills. EPDM is a modern version of traditional black rubber roofs and is considered a synthetic rubber. It is also able to reflect ultraviolet rays, enabling a cool roof.

In addition to being economical, single-ply low pitch roofing systems also come with disadvantages. Poor installation or maintenance can reduce their lifespan. For example, improper installation can cause blistering, ridges and lapping areas, and can lead to wind damage. Therefore, it is important to compare single-ply roofing quotes and the deliverables of different companies to make the right decision for your home.

Hydrostatic roofing

If you have a low-slope roof, you should consider a hydrostatic roofing system. This type of roofing system is suitable for roofs that have a slope of between 1/4:12 and 3:12. Hydrostatic roofing systems are structural, meaning that they can withstand hydrostatic pressure. These systems are usually used on large buildings. Some systems are designed to shed water very quickly. In these cases, you should consider installing a water barrier membrane underneath the metal cladding.

APP MB roofing systems have two main components: a base sheet and a cap sheet. The cap sheet is either heat-welded to the base sheet or mechanically attached. Some manufacturers also manufacture systems that use a factory-applied adhesive on the underside of the cap sheet.

Traditional hydrostatic water barrier systems require a solid substrate and metals that can be soldered. They are also labor-intensive and require careful workmanship. Generally, these systems are recommended only when the roof is old or requires structural restoration.


When a building needs additional insulation, a cover board can be a great option. These boards are usually made of a high-density polyisocyanurate (HIPS) core with fiberglass faces. They provide a surface for the membrane to adhere to, ensuring the final roof system remains leak-free.

There are many types of cover boards, each with specific features and properties. They can act as thermal barriers, fire barriers, and vapor retarders. While some products are made of glass fibers or mineral wool, others are made of expanded polystyrene (EPS) or beadboard. Both types of materials have their pros and cons.

One type of low pitched roofing system coverboard is perlite-based, and this material can be used to cover a variety of roof types. A high-density perlite cover board, for example, can be placed over a shingle roof in a re-roofing process. These products are generally one-half inch thick and are a more dense product than their Type 1 and 2 counterparts. One manufacturer of such a product is Johns Manville, which markets the Fesco(r) Board.

SBS modified bitumen

SBS modified bitumen is a highly durable waterproofing membrane that is resistant to mechanical damage and punctures. The SBS blend has exceptional tensile strength and dimensional stability. It is also highly flexible and can accommodate building movement. Its versatility allows it to be applied in several ways: torch-applied, mechanically fixed, or adhered. Because of these benefits, it is a great choice for low pitched roof systems.

Another advantage of SBS modified bitumen is that it can be applied in two or three layers, which can reduce the risk of leaks. These systems also tend to be more durable than TPO single-ply roofs, which typically carry 20-year warranties. However, TPO manufacturers are on their sixth formulation iteration and still have not solved many performance issues. By comparison, SBS-modified asphalt materials have been proven to outlast TPOs for decades.

Another advantage of SBS-modified bitumen is its ability to withstand UV rays. These are excellent properties for cooling roofs.

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