- Reinforced Bitumen Membranes, RBMs
- Structural Deck
- Ethylene Propylene Diene Monomer, EPDM
- Glass Reinforced Plastic, GPR
- Single Ply
There are several choices that are durable and affordable, which makes them more cost effective.
Reinforced Bitumen Membranes
Better known by the acronym RBMs, this type of roof involves putting down two to three layers of a waterproof and/or flexible material, like felt, and bonding them with hot bitumen. The bond it creates is a waterproof membrane. However, it needs a protective layer of either shingles or gravel to prevent the membrane from sun damage and from blowing away.
Asphalt, which is bonded with felt paper, is one of the oldest types of flat roofs. The material is held down with either nails or asphalt cement and it is an effective roofing material within its lifespan. However, asphalt degrades quicker than most of the modern materials used on flat roofs today.
Single ply membranes are very durable and are made from flexible polymers like PVC. The membrane is held down by mechanical fasteners. This involves using long plastic tubes with short screws that are driven through the membrane to the roof’s structural deck.
There are many considerations for choosing a roofing material and an affordable roofing company in York can help you choose the best material for your needs.