Green Roof Drainage Mat Thickness

Developed by fm approvals llc fm standard 4477 is the approval standard for vegetative roof systems.

Green roof drainage mat thickness.

Protection drainage and filtration. Moisture retention and protection mat specifically designed for sloped green roofs. The nominal thickness of a green roof is the approximate total height of the soil and drainage components that constitute the green roof system excluding the roof structure insulation waterproofing and plants. 17 20 mm.

Made of non rotting fibers penetration resistant for water and nutrient retention as well as protection layer. Green roof solutions gr32 and gr52 drainage panels come in 24 x 24 interlocking squares constructed of 100 recycled high density polypropylene hdpp. It evaluates green roof performance related to fire foot traffic resistance and water leakage. Sdf mat drainage filtration layer.

Extensive green roofs are less than six inches deep and are typically 2 4 inches in depth. The sdf mat drainage filtration layer is a multi functional drainage and filter layer which prevents the roots of the plants in the xf301 sedum system from becoming waterlogged. Roofs that have potted plants or container gardens are not generally considered green roofs. In july 2011 the liveroof hybrid green roof system became the first to be fm approved according the fm standard 4477.

It is ideal for drainage and drying behind stucco and. Because dc14 is made of extruded polystyrene xps it does not absorb moisture and is not a food source for mold. The board is effective with fiber cement wood and foam backed vinyl. Compared with green roofs systems using drainage plates or granular drainage this system is the fastest to install and creates the thinnest and lightest green roof assembly.

It is made of a filtration veil and the polyamide monofilament fibre network layer. It is specified in some very low pitched extensive green roofs. The gr52 can withstand 0 352 gallons per square foot or 1 4 gallons per panel. The grs gr52 panel size is 24 x 24 x 2 125.

With drainage channels on both sides it permits easy drainage for water and allows air movement between the siding and sheathing to help keep the wall dry. Systems with drainage mats. Drainage protection filtration layer it is used for lightweight green roofs terraces and has many functions. Green roof systems of this type are drained by a multi layer fabric mat called a drainage mat that combines soil separation drainage and protection functions.

Designed for sloped green roofs. It is common practice to use the term extensive to describe green roofs that are very thin and will only support hardy drought resistant vegetation such as sedums herbs and perennials.