luscious green roof on a garden shed

DIY Green Roof Guide

The online resource for building small scale green roofs on garden sheds, garages, house extensions and other small construction or retrofitting projects

a green roof on a new house extension

New Builds

A step by step guide to creating a SAFE and LEAK FREE green roof on a new small scale construction project. Learn from the vastly experienced authors how to accomplish it yourself or provide guidance to your contractors

a small green roof on an electrical substation


Even the smallest of roof spaces can provide a small haven of beauty and a wildlife oasis. The retrofitting section advice can be used on garden sheds, cycle & bin shelters, the fundamentals remain the same!

edge details of a garden shed green roof


From suggested screw sizes through edge details to drainage suggestions, John & Dusty take you through the process using text, photos, illustrations and videos

edge details of a garden shed green roof

Planting Ideas

Plant suggestions focussed on native species that can provide the maximum biodiversity. Separate lists for the UK, Eastern USA & Canada, Mid-West USA

Before You Start

Your Green Roof Installation

If you are involved in a new build try not to follow conventional green roof logic. This tends toward  the lightest solution possible. This is a built environment profession approach and can lead to green roofs that are not resilient, especially during periods of hot weather. This can cause disappointment in the years to come, especially in periods of extended drought.  Any approach is possible but we have found a good depth of substrate under a blanket, turf or a seed/plug approach is vital.

Our Green Roof Training, Advice & Guide

Therefore consider what you want to achieve with your green roof installation and then decide on the structure you need. This is particularly important if you have delegated to an architect or designer. In the majority of cases the default approach for most design professionals is to go as light as possible. YOU dictate to the architect the load you want. YOU are the client.

If you are retrofitting you may be limited due to weight considerations. This may mean you may have to go for something lighter. In some situations such as sheds and some extensions, strengthening of the structure is very feasible.  You, however,  may consider this too much work and cost. Our advice is to seriously consider strengthening. You are going to live or someone else is going to live with the green roof for years to come. Why not do it well from the start to get maximum benefit and satisfaction from it in the long run.

Finally a green roof is not a building product. It is not inanimate. It is a living thing that changes with the seasons and the vagaries of our current climate changes! This is not a negative, though it can be perceived to be. It is a positive. Enjoy the visual changes through the seasons and the climate in a given year.

The guide will help you make the decisions you need to make.

Good luck and enjoy.

Get Started Now or Find Out More!

Gain immediate lifetime access for only £11.50 or an annual subscription of £5.50 per year. Or merely browse the public areas of the website and find out more about the whys and hows of designing and building small green roofs before you join. 

Spring 2024 Special

The first 30 new registrations for the Lifetime Membership option can get £2.50 off the usual price by using the discount code 20E3E039F7  at the checkout. That means only paying £9.00 in total to gain permanent access the full guide. So grab a discounted membership now before they all go.