0

Green Roofs (Flat)

Knowledge of green roof construction methods and the benefits of incorporating them in building design is steadily becoming more widespread in the UK.

Unlike pitched green roofs, flat green roofs can either take the form of extensive (consisting of a thin layer of turf or sedum matting), or intensive (characterised by a greater soil depth that can even accommodate shrubs and trees).

Flat Green Roofs Video Hero

How to Build a Flat Green Roof

Rooftop gardens are types of flat green roofs that provide valuable secluded green space in urban settings.

The build-up of a flat green roof will vary depending upon the intended use. Please contact our technical department on 01403 210204 or submit an enquiry for more information.

A standard roofing membrane and insulation layer is laid onto the underlying roof structure, then a studded, perforated drainage membrane such as Oldroyd Xv 20 GreenXtra is used in addition to provide a drainage layer with reservoir capability. A filtrating drainage layer is laid down before adding the required soil loading and plantings, as shown in the diagram above.

In situations where the roofing membrane does not offer adequate root resistance, a Safeguard Root Barrier layer may need to be included between the roofing membrane and the Oldroyd Xv 20 GreenXtra drainage layer.

Other examples of typical green roof build-ups can be found in our library of CAD drawings.

For rooftop gardens, concrete decking is often used to provide a suitable load-bearing construction, whereas substantial reinforcement is not usually required for a lightweight flat turf roof.

Biodiverse Roofs

Biodiverse roofs are flat green roofs which have been specifically designed with particular biodiversity objectives in mind – see our biodiverse roofs page for details.

Fixing Guide

Download the Oldroyd Flat Green Roof Application Guidelines

A guide to installing flat green roofs can be downloaded free of charge in PDF format by clicking on the image to the right.

The guide shows how Oldroyd Xv 20 GreenXtra can be used in conjunction with a primary waterproofing system to create a flat green roof.

Technical Support

If you would like more information on designing or specifying green roofs, please call our technical department on 01403 210204 or submit an enquiry.

Get it Done

Oldroyd Turf Roof Hook Brackets for securing turf on pitched green roofs.
£16.60
Oldroyd Turf Roof Plugs Fixings for Oldroyd Xv Green membrane to create pitched green roofs (also known as turf roofs or sod roofs).
£29.99
£{* exTotalPrice *} £{* totalPrice *}
All Articles
Advice
Case Studies
News
NOPE! brown rat image Advice
How to Get Rid of Rodents: Black Rats, Brown Rats & Mice

Brown Rats, Black Rats & House Mice are invading UK homes. Use this guide to detect, prevent and remove rodents from your home.

Read more
How to Get Rid of Slugs Hero Image Advice
How to Get Rid of Slugs in the Garden: Natural, Organic & Effective Control

Learn why slugs keep coming back, how common prevention and pest control techniques work and which control methods to use for best results.

Read more
A man sneezes in the park, with a cloud of pollen near Advice
Hay Fever Relief UK: Symptoms & Indoor Air Relief

If you suffer from hay fever (allergic rhinitis), spring means a runny nose, itchy eyes and sneezing. Here's the guide to hay fever relief.

Read more
NOPE Slug Killer Disc Pellets Product Info Card Image News
Out Now: NOPE! Slug Killer Disc Pellets

Defend flowers, fruit and veg in your organic garden with new NOPE! Slug Killer Disc Pellets.

Read more
NOPE Rat Killer Grain Bait and Bait Station Product Info Card Image News
Out Now: NOPE! Rat Killer Grain Bait & Rodent Bait Station Range

Our highly effective rodent control system pairs super-strength brodifacoum grain sachets with a lockable and tamper-resistant bait station.

Read more
YDC and Safeguard Working Together - Leeds Basement 2 Case Study
Domestic Property Basement Renovation Part 1 – Drybase Tanking System

With Tibby Singh and YDC Basements, Safeguard waterproofed a basement at an end of terrace home in Leeds using Drybase Tanking System.

Read more
Ferring Pillbox Brush Application Case Study
1940s Concrete Pillbox, West Sussex — High-Performance Waterproofing with Stormdry Masonry Protection Cream

Built in Summer 1940, the Type 26 pillbox is a 6 ft by 6 ft cube just big enough to house 4 soldiers and their guns. The 1 m thick concrete walls were built to withstand a direct hit from a naval warship. 98 tons of concrete went into creating the pillbox. In the 1980s, the whole exterior was covered…

Read more
Swindon House Featured Image Case Study
Domestic Bungalow, Swindon - Cleaning and Preventing Mould

When Emerald Damp Specialists stepped inside a severely damp bungalow in Swindon, they knew they had to help. Along with 70 other companies and over 150 volunteers who donated their time and expertise, Emerald Damp Specialists resolved the extreme damp and mould problems at the property free-of-charge. For this project, ensuring that a valued member of the community had a…

Read more
Join our newsletter

Subscribe to get information about products and offers.