Living Roofs
Through our partner company,
NEDLAW Living Roofs™, we can add a living roof application,
also known as a green roof, to most of the following systems. Living roofs are
an innovative yet time-honoured roofing solution that incorporates living plant
materials. Living roofs have proven to lower heating and cooling costs, reduce
green house gases and extend a roof’s lifespan. For more information, visit
NEDLAW
Living Roofs.
Built-up Roof Systems
Built-up roofing systems, which have been used for almost 150 years, consist of
multiple plies of reinforcing felts laid shingle fashion into continuous moppings
of hot asphalt or cold adhesives. The system is then covered with aggregate set
in an asphalt flood coat or final cold adhesive application. The plies can consist
of organic membranes or glass fiber membranes.
Modified Roof Systems
This type of roof system uses modified bitumen membranes, which are factory-rolled
products with rubberized or polymeric asphalt applied to one side at the factory.
It can be installed by mopping on hot asphalt to adhere the membrane to the
roof or, more commonly, by using a propane torch to heat the underside of the
coating. Melting to a near-liquid, the membrane is then rolled onto the roof
in a continuous operation.
EPDM Roof Systems
EPDM roofing systems, also known as single-ply systems, are factory-fabricated,
rubber-roofing membranes, which are available in several thicknesses. Primarily,
they are synthetic single-layer sheets of ethylene propylene diene monomer.
EPDM systems can be installed using a variety of methods, including loose-laid
and ballasted, fully adhered, or mechanically attached means.
Thermoplastic Roof Systems
This roofing system is similar to the EPDM system. However, its synthetic single-ply
membrane sheets are made of a number of other materials, most commonly polyvinyl
chloride (PVC) and thermoplastic polyolefin (TPO). These membranes are available
in a variety of thicknesses and colours.
Protected Membrane Roof Systems
Protected membrane roof systems generally consist of a polyester fabric sandwiched
between two layers of hot rubberized asphalt. This versatile system is suitable
for use in a wide range of applications — whether above-grade or below-grade,
horizontal or vertical. This method, which is referred to as “hot rubber”
when used on parking garages, parking decks, foundations and walkable decks,
requires a specialized oil bath kettle to heat the rubberized asphalt.