PermaSEAL 8 GeoWrap 1m x 20m External Geodrain Membrane

One Metre External Waterproofing Membrane - 1m x 20m

PermaSEAL 8 GeoWrap is an ultra-convenient external geodrain drainage membrane, supplied in one-metre high rolls. The membrane is made up of an 8mm studded cavity drain membrane with a high-quality geotextile filter fabric bonded to the stud face. This creates an 8mm cavity that effectively controls water entering freely from the surrounding terrain, depressurises it and channels the water down into the drainage system. In most cases this would be a French drain or drainage system installed at the lower part of the wall.

Using the highest quality materials and manufacturing processes, PermaSEAL 8 GeoWrap delivers long-term performance in any external application.

Available as:

Our PermaSEAL 8 GeoWrap is available as a single 1m x 20m membrane roll or as an External Membrane Kit that contains all the components you need to install except the drill and a hammer:

• 1 x PermaSEAL 8 GeoWrap 1m x 20m (20m²)
• 1 x PermaSEAL Brick Plugs with Sealing Washers Box of 25
• 1 x 10mm SDS Drill Bit
• 20 x PermaSEAL Capping Strips 1m lengths

If you require a taller roll, we supply our PermaSEAL Geodrain Membrane in two metre high rolls that can be installed like wallpaper or wrapped around the building.

Benefits

At Permagard, we pride ourselves on meeting the evolving needs of our customers. With PermaSEAL 8 GeoWrap, we’ve listened and developed a product to help you get the job done. PermaSEAL 8 GeoWrap has been designed to provide ultra convenience for the installer. The unique height of one metre allows it to be wrapped around the foundations in one continuous band, meaning limited joints, if any, are required.

The membrane is supplied as a 0.97m plastic roll with a 1m geotextile. This allows for the geotextile to be fixed over the top of the roll behind a capping strip to ensure no backfill falls down into the membrane cavity from above.

PermaSEAL 8 GeoWrap utilises the same high specification Typar geotextile as our other professional Geodrain membranes in the PermaSEAL® range. This market-leading geotextile allows water movement into the cavity from the surrounding terrain but prevents fines and sediments from blocking it. Therefore, you can be confident in the performance of PermaSEAL 8 GeoWrap for years to come. 

Why are PermaSEAL® Geodrains Market Leading?

It's all in the manufacturing process. PermaSEAL External Geodrain membranes are manufactured in two phases, firstly the membranes are extruded then the geotextile is applied. This gives PermaSEAL’s membrane a true cavity, unlike other manufacturers who apply the geotextile in the extrusion process, which creates a nominal cavity. PermaSEAL’s geodrain membranes have a true and defined, free-flowing cavity as pictured below.

Uses

PermaSEAL 8 GeoWrap is suitable for external structural waterproofing of foundations and various landscaping jobs. Any external retaining wall that needs an effective way of draining water away to prevent the build-up of pressure can incorporate PermaSEAL 8 GeoWrap.

• Remedial external foundation waterproofing - provides structural protection and effective external drainage of foundations up to one metre.
• Landscaping retaining walls - sunken gardens (read our guide to waterproofing and drainage of hidden gardens), behind sleeper walls and in large planters.

Installation

In external foundation or retaining masonry wall waterproofing applications, PermaSEAL 8 GeoWrap must always be used in combination with a primary waterproofing system, such as PermaSEAL PRO MP 2C or PermaSEAL Self Adhesive Tanking Membrane. Once dry, follow the below steps:

1. Stand the PermaSEAL 8 GeoWrap up against the foundation with the geotextile overhang at the top of the roll.
2. Make sure the top of the membrane is level with your predetermined ground level line before unrolling the membrane to one metre. Now stop to create fixings.
3. Pull back the geotextile at the top corner of the membrane and drill a 10mm hole, 70mm deep, into the masonry.
4. Now remove any dust from the hole and hammer home a PermaSEAL Brick Plug, until the rubber seal is compressed.
5. Replace the geotextile fabric and repeat this process every one metre along the length of the membrane.
6. Once the membrane is fixed, install PermaSEAL Capping Strip along the top of the membrane over the geotextile overlap to close the system.

Landscaping of wooden structures, follow the below installation steps:

1. Stand the PermaSEAL 8 GeoWrap up against the wooden structure with the geotextile overhang at the top of the roll.
2. Ensuring the top of the membrane is level with your predetermined ground level line, unroll the membrane to 1 metre and now stop to create fixings.
3. Every 250mm pull back the geotextile at the top of the membrane and between the studs hammer a galvanised clout nail into the surface.
4. Replace the geotextile fabric and repeat this process along the length of the membrane.
5. Once the membrane is fixed, install PermaSEAL Capping Strip along the top of the membrane over the geotextile overlap to close the system.

Once fixed in place, back filling can commence. It is important to back fill by hand or light machinery, making sure not to damage the membrane by placing unnecessary downward pressure on it. A good drainage material is preferred to soil, when possible.

PermaSEAL - Complete Solutions. Made Possible.

Our PermaSEAL external waterproofing system is trusted by professionals. You can use our PermaSEAL 8 GeoWrap and other Geodrain membranes and related products safe in the knowledge that they meet the highest quality levels. For more details on applications for this unique product contact our technical team on 0117 982 3282.

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