Laserfiche WebLink
Green roofs serve as wildlife habitats through their ability to act as a food source <br /> for birds and butterflies as well as being a space for bird and insect nesting habitats, <br /> which leads to an increase in biodiversity. Biodiversity improves the productivity of an <br /> ecosystem which brings many health benefits such as reducing allergies and asthma.5 <br /> The roofs can also serve as an educational/demonstrative space about both plants and <br /> correct green roof practice. This is especially important at Elk River where this green <br /> roof will be the first public green roof in the city where it can serve as an example for <br /> others interested in sustainable alternatives. <br /> Are there different types of green roofs? <br /> There are two types of green roofs: Intensive and Extensive. Intensive green <br /> roofs have a large plant palette and have a 12 cm-35 cm substrate. These types of <br /> green roofs have a "parklike" appearance and are high maintenance. Extensive green <br /> roofs have a more limited plant palette, composed of drought resistant plants (e.g. <br /> sedums), and has a 10 cm substrate. These green roofs require less maintenance and <br /> have limited public access .' <br /> Intensive Green Roof Extensive Green Roof <br /> 1 " <br /> kj <br /> R+ <br /> r, <br /> :xtits Ns ' <br /> ;,"NOW <br /> nn i <br /> (http://recovergreenroofs.com/project-breakdown/)(http://www.greenrooftechnology.com/green-roof-blog/extensive_verses_intensive_-_what_wouldyouu_choose) <br /> What are the parts of our green roof? <br /> There are multiple components of a green roof that contribute to the roof working <br /> properly and efficiently. The first part of a green roof is the waterproof membrane that <br /> prevents waters from leaking into the roof and also prevents roots of the plants from <br /> growing into the roof itself. This can be heavy-duty pond liner or polyvinyl chloride <br /> material. A liquid waterproofing process could also be used, which is the best option for <br /> ensuring waterproofing and root resistance. After the waterproof layer comes the <br /> drainage and storage layer. This is a perforated or dimpled plastic sheet that stores <br /> rainwater for the vegetation. This layer also assists in preventing roots from entering the <br /> waterproof membrane. A filter fabric is added next, which keeps small particles from <br /> 4 <br />