Green Shed Roof Drainage

This guide shows you how to fit a green roof to a shed.

Green shed roof drainage.

Make a green roof on a shed. Building a green roof on your shed is a way to add interest to the shed and produce a new area to cultivate. However there is a need to get what rain that is not stored of the roof. This improves the drainage of the green roof which helps reduce soil erosion and aerate plants.

A shed that is located in an area that drains poorly can have problems including muddy ground or the shed sinking into eroding soil. For this shed i used nominally flat roof. If you want to fit a green roof to your house or garage it is always recommended that you take specialist advice as drainage and specific protective layers may be required that are usually out of the skills of most common gardeners. Depending on regional precipitation rates and the water retention goals for your specific project green roof solutions has a full range of products to meet your needs.

Step 5 cut a piece of weed matting large enough to cover the roof and the inside of the frame. A shallow roof pitch wont allow water to drain away. When saturated these layers can weigh in at more than 100kg per square metre or 20lbs per square foot. This can be especially bad if the shed doesn t have a gutter system and rain water flows directly off the roof and onto the ground.

For plants to flourish on a green roof they will need moisture and drainage which means soil and a sturdy framework to keep it in place. Building a drainage system in the ground near the shed can help remove excess. The slope of a green shed roof needs to be a balance between being too steep or too shallow. You are going to be adding significant extra weight onto the shed roof so you need to know that the structure is strong enough to support it.

Lay it over the gravel and attach to the frame using tacks. On modern lightweight green roofs plastic drainage sheets or boards are the preferred drainage materials. Plastic drainage layers may be rigid open mesh structures that allow unrestricted drainage of water or they may have a cup style egg carton design that enables water to be stored at the base of the profile see image below. Step 1 check if it is load bearing.

How to vertical drain a green roof. Green roofs are made up of several layers typically a waterproof root barrier layer to protect the roof a drainage layer water retention mat then the growing medium and vegetation. The green roof guide gives all the details about to drain a green roof laterally. There are a number of factors to consider before adding a green roof to your shed not the least of which is whether your shed will be strong enough.

This gave a 1 40 slope which was enough to encourage water to drain. Make a green roof on a shed. Grs drainage products typically fit into a green roof system above the grs root barrier and below the grs filter fabric.