Green pitched roof installation

The main difference between the two is the location of the insulation. To create a warm pitched roof, insulation such as Kingspan Kooltherm K Pitched Roof Board , should be fitted between and over the rafters.

As this requires fitting insulation above the rafters the roof covering will have to be removed in order to fit the insulation. This roof type will require a breathable membrane, like Kingspan nilvent, to be fitted above the insulation. The construction build up for this can be seen on our online U-value calculator.

In this case we would suggest fitting Kooltherm K Pitched Roof Board between the rafters and Kooltherm K Insulated Plasterboard to the inside face of the rafters. Usually this construction is a ventilated roof which will have sarking felt. The sheer forces are just too extreme.

Depending on the steepness and the length of the run, a structural parapet may not be sufficient to contain the force of the green roof. Care must be exercised in the design and the construction of these stops to minimize penetrations in the waterproofing system. Designers wanted a lush, tilting lawn that curved up on two sides, and could withstand public access. To keep the vegetation and growing media from sliding off the roof, they used GardNet from American Hydrotech, a product originally developed for the U.

Military during the first Gulf War in The product is basically a rigid, dimpled EPS foam board with each dimple or tooth measuring a full three inches tall. The trays serve as excellent soil retention, and they solve water retention issues as well. If the roof is fairly steep, the trays must be secured to the roof deck, but they have some advantages no other system offers. The vegetation can easily be moved or rearranged.

The 1, sq. The 15, sq. When the story condominium was completed in , it could claim the steepest sloping green roof in the United States. Once again, Gardnet was used to stabilize the soil. Solution 3: For Steep Slopes: When roof pitches exceed 26o , engineering becomes extreme.

Sheer forces are so great that eave and parapet reinforcement is no longer adequate. Installers must use some other system to hold the growth media and plants in place that transfers the load onto the structural roof deck. At least four companies market soil-retention products specifically for steeply sloped green roofs. They work by dividing the roof area into smaller cells, usually about a foot square, which are structurally anchored onto the roof deck.

Perhaps the most well-know is GardNet, sold by American Hydrotech. The Boston project has sections of its green roof approaching 45 degrees The five-inch-high tiles are then filled or covered with growing medium. Like GardNet, Georaster has been used successfully on slopes up to 45o. This product was used on the barrel roof of the Testa Produce building in Chicago, Ill. The 4-inch thick growing medium covers 7, sq.

But because of the unique shape, the weight on one side of the roof counteracts the weight on the other. Laying a green roof, flat or pitched to improve thermal insulation, alleviate flooding and reduce noise. Don't want to do this job yourself? Let us help you find a tradesman local to you. A Green Roof is a roof, flat or pitched, which is covered with living vegetation of some kind.

This vegetation is laid over a waterproof covering to keep the water from entering the property. Intensive Green Roofs: These are roofs which require fairly intensive maintenance. The soil is deeper than an extensive roof and the vegetation is usually larger or more intense.

Intensive Green Roofs can hold larger plants and small trees etc and are usually for larger buildings and, again usually, allow for access, walks etc. A good use for an Intensive Green Roof is a herb garden. Extensive Green Roofs: Extensive roofs require the minimum of maintenance and are laid on a much thinner layer of soil. The plants used are usually of the Sedum species which are very hardy with water storing leaves. DIY Green Roofs can be surprising easy to create. A rubber sheet is laid on the roof first.

Then edging strips are laid to stop any soil or vegetation washing into the gutter or onto the ground in bad weather. The vegetation mat used here is a recycled CFC free mat profiled with integrated clay minerals and plant feeding elements which act as slow release fertilisers.

The mat offers structural protection as well as filtering out pollutants. Non-rotting, needled fleece mat, made of recycled fibres. The system solution shown relates to the green roof build-up in particular. The roof construction itself is only shown schematically and must be planned and executed according to specialist rules for waterproofed roofs. Technical Data Build-up height ca. Systems for Pitched Green Roofs.