PermaSEAL PRO 25P Green Roof Membrane

Green Roof Drainage Membrane with 25mm water storage cavities

PermaSEAL PRO 25P is a high quality HDPE green roof drainage and water storage membrane. It operates as both a green roof drainage layer and a large volume water storage membrane in extensive and intensive green roof applications. It is also suitable for use in other walkable surfaces.

Drainage for green roofs is critical to avoid saturation of the sedum, grass and other roots above. Our recycled HDPE membrane is perforated to allow water to pass through to the drainage space below. The 25mm cavities store a large volume of water to help maintain a healthy green roof. PermaSEAL PRO 25P is available in both board and roll out versions:

• Roll out versions - membrane incorporates a bonded high quality geotextile filter layer. This prevents slip and compression into storage cups as well as protecting against soil obstruction. Also, saves time in installation as you don’t need a loose laid geotextile.
• Board versions: the 1m x 2m drainage board version is a more manageable size and weight, but is supplied without a bonded geotextile element. This makes it ideal for smaller DIY projects

Available sizes

• 1m x 2m Board (coming soon)
• 1m x 10m Roll
• 2m x 10m Roll

Uses of PermaSEAL PRO 25P

PermaSEAL PRO 25P Green Roof is used as a water storage and drainage layer in conjunction with a primary waterproof coating above decks, flat roofs and pitched roofs. As the membrane is perforated, it is also suitable for inverted warm roof application.

Note: The 1m x 2m green roof drainage boards are ideal for bin stores, bike sheds or even a garden home office. The boards can be cut and placed easily on the structure.

Benefits

• Long Lasting - PermaSEAL PRO 25P Green Roof is guaranteed against deterioration for 30 years. It has a life expectancy equal to the design life of the structure (DIN 9001:2000).
• High resistance - PermaSEAL PRO 25P is manufactured from recycled HDPE which is highly resistant to water, alkalis, saline solutions and organic acid. It is not affected by minerals, bacteria, fungi, and other small organisms.

Installing 25P as part of a Green Roof System

The structure must have a suitable primary waterproofing layer like MP 2C that can be applied directly to concrete roof deck or screed. Next, roll out or position the 25P membrane across the length of the structure. A slip layer like PermaSEAL PRO Green Roof Root Barrier may be required in some systems.

Overlap the ends of two rolls of membrane, connecting the cavities. PermaSEAL Jointing Tape is available for additional protection.

For more information, read our green roof construction guide.

Other products in the PermaSEAL PRO green roof range

• PermaSEAL PRO 8 Green Roof Drainage Membrane
• PermaSEAL PRO 20P Green Roof Drainage & Storage Membrane
• PermaSEAL PRO 40P Green Roof Drainage & Storage Membrane
• PermaSEAL PRO 60P Green Roof Drainage & Storage Membrane
• PermaSEAL PRO 11 Geodrain Drainage Membrane
• PermaSEAL PRO MP 2C – primary waterproofing of vertical and horizontal surfaces, applied directly to the concrete roof deck or screed.
• PermaSEAL PRO Green Roof Protection Fleece 300
• PermaSEAL PRO Green Roof Root Barrier

PermaSEAL PRO Green Roof Systems

Make your next green roof project a success with Permagard’s range of professional products. Our PermaSEAL PRO 25P membrane functions as part of a wider green roof system. Please contact our technical department if you have any questions about your specification. Call us on 0117 982 3282.

Find out more about our PRO green roof systems and download a brochure or browse our professional range of products.