The most common thermosetting roof membrane is EPDM. EPDM is primarily composed of two compounds, ethylene and propylene, which are derived from petroleum and are natural. Thermosetting membranes incorporate the main polymers that are chemically cross-linked or vulcanized. Vulcanized membranes may also be referred to as “cured”.
A characteristic of true thermostable polymers is that, once they cure, they can only be attached to similar materials with adhesives. EPDM is primarily composed of two compounds, ethylene and propylene, which are derived from petroleum and natural gas. The widths of EPDM membrane sheets range from 7.5 to 50 feet wide and are usually 45 mm and 60 mm thick. The joints are sealed with liquid adhesives or specially formulated tapes.
The membranes are usually black, but white ones are available and can be installed fully bonded, mechanically joined (with ribbon bars) or weighted. Most EPDM membranes don't receive surfaces. Butyl rubber waterproofing membranes consist of factory-made reinforced butyl rubber sheets. The sheets are usually 60 mm, 90 mm or 120 mm thick (1.5 mm, 2.3 mm or 3.0 mm) thick.).
It is recommended to use reinforced butyl rubber membranes that are at least 90 mil (2.3 mm) thick for green roof assemblies. Do not install butyl rubber waterproofing membranes when the ambient temperature is below 40°F. Butyl rubber membranes should only be used in conjunction with the adhesives and tapes recommended by the membrane manufacturer.
The subfloor under the metal roof can be any of the many synthetic subfloors for roofs.
I prefer to use a permeable one (i.e. Deckarmour or BreathX), as it has a minimal additional cost and allows the trapped water to dry out a little.The bottom layer does not need to be self-adhesive. A good idea is to use a strip that peels off and sticks at high temperature (for example, Grace HT) around the roof valley. Choose a thicker membrane for better puncture resistance. In the case of single-layer membranes, 60 mm should be considered as the minimum thickness to be used in a green roof application. Green roofs are a great option for customers and a sustainable option that improves our world.
FiberTite's green roof technology is based on sustainable features that help manage stormwater, energy use and pollution. The popularity of energy efficient roofs is growing around the world thanks to their ability to manage environmental challenges. Polymer-modified bitumen waterproofing membranes can be installed using one of three techniques that depend on the composition of the modifier used. Solution The restoration of Manitoga's two green roofs combines historic consideration with proven technologies and innovations.
Extensive green roofs, which use sedum vegetation (such as succulents), are the most commonly used on flat roofs, as they are lightweight and require little maintenance. This includes many common applications that use single-layer membranes, such as TPO, EPDM and PVC, as well as other high-quality applications, such as systems applied with hot or cold fluid and constructed roofs (BUR). Elastomeric waterproofing membranes for fluid application consist of polyurethane elastomers with a high solid content in liquid form. A PMMA roofing membrane can be used for new construction, replacing or coating an existing roofing system.
Elevate single-layer EPDM and TPO roofing membranes offer a reliable and durable solution for this type of application. The protective layer and root barrier must be able to protect the waterproofing membrane during subsequent construction and resist root penetration, respectively. Waterproofing membranes accumulated with coal tar are composed of alternating layers of coal tar and reinforcing sheets. Electron field vector mapping uses direct current and water (with a surfactant) to check for gaps in the roof membrane.
However, a green roof assembly (GRA) is not simply a roof assembly covered with plants or gardens. For more elaborate green roof designs with vegetation or if you want to extend roof warranties, consider using the thicker membranes available in that product line. The main membrane roof systems that have been installed under green roofs are explained below. In my research, I discovered that root barriers installed on green roofs are usually made of plastic and that polyethylene and high-density polyethylene are the most commonly used materials.
They are robust, easy to install and maintain, and offer the perfect combination for extensive green roof applications.
