Don’t site it across prevailing winds unless there are a few holes in it, otherwise turbulence will smack over the top and down on you with great force. Glass is commonly used as a balustrade and wind buffer on roof terraces as it provides uninterrupted views. Instead, choose permeable trelliswork, hit-and-miss cedar battens arranged horizontally, or perforated sailcloth that filters the wind so only a subtle breeze is felt on the leeward (downwind) side. Unless there is protection from surrounding buildings, solid windbreaks aren’t a good idea as they block out the view, plus the wind stress on fixings is high. Many plants can cope with it, but you might need some shelter if you want to enjoy the space all year round. Provide feed in spring and autumn, and periodically check for weeds.Wind is a common problem on roof gardens. Water after installation, and continue to water twice a week during dry spells until new growth becomes visible. Similar to laying turf, ensure the matting pieces fit snugly together to prevent edges from drying out. Trim your sedum matting to the required size and lay it over the growing medium. For sedums, this medium should be light, well-draining, and low in nutrients – suitable options can be found online. Spread a 2 cm layer of growing medium onto the fleece. Place a layer of protective sedum fleece atop the waterproof membrane to prevent sedum roots from harming the roof. This allows water to drain underneath the frame. At the roof's lowest edge, ensure the membrane overlaps the roof felting, and fix the final frame panel on top of it. Install a waterproof membrane inside the frame, securing it to the frame walls with a staple gun. Attach the side and top panels to the roof using galvanized screws, leaving the lowest-edge panel off until after the waterproof membrane is applied. This frame will contain the growing medium and sedum matting. Conversely, if the slope is too steep, rainwater will run off before plants can absorb it.Ĭonstruct a 3 cm deep tanalized timber frame to fit your shed roof. If the roof is excessively flat, proper drainage becomes an issue, potentially causing plant rot. Opt for a shed with a reinforced roof if you're purchasing a new one.Įnsure the roof has a slope between 1 and 5 degrees from the horizontal. How to install a sedum green roof on a shedĭespite the relatively lightweight nature of sedum green roofs, reinforcing the roof before installation is advisable to support the added weight (both the matting and growing medium become heavier when wet). This makes them lightweight enough to be cultivated on garden sheds. While green roofs on structures like houses, garages, and offices require specialized design due to weight, waterproofing, and drainage considerations, sedum matting employs low-growing, drought-tolerant succulents that necessitate only a thin layer of growing medium. Beyond introducing greenery to neglected corners of our gardens, such as bike shelters and sheds, green roofs absorb rainwater and provide a vital food source for pollinators. In essence, a green roof entails covering a roof with plants, which are cultivated in a growing medium placed over a waterproof membrane. Installing a simple sedum matting on your shed's roof is a straightforward task that brings numerous benefits to your garden. Want to enhance the appearance of your shed while boosting your garden's biodiversity? A green roof might be just what you need.
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