Platon P8 Basement Tanking Membrane Kit

A high quality, BBA Approved Waterproof Tanking Membrane Kit using Platon P8 Membrane supplied with a roll Platon Sealing Tape, and the recommended number of Platon Brick Plugs & Seals for fixing.

Each kit size is also supplied with a high quality (W) 10mm x (L) 160mm SDS Drill Bit.

The Platon P8 Waterproof Membrane Kit can be purchased in 10M², 20M² or 40M² sizes, use the drop-down box option below to choose your preferred kit size.

A full table of each Membrane Kit Contents is shown below in the 'Description' Tab.

  Platon P8 is supported by BBA Certification Certificate Number 01/3823.

Kit & Membrane Size

Kit & Membrane Size
Sale price £189.00 Regular price £206.05
ex. VAT
Regular price £226.80 £226.80 Sale price Regular price £247.26
inc. VAT

A high quality, BBA Approved Waterproof Tanking Membrane Kit using Platon P8 Membrane supplied with a roll Platon Sealing Tape, and the recommended number of Platon Brick Plugs & Seals for fixing.

Each kit size is also supplied with a high quality (W) 10mm x (L) 160mm SDS Drill Bit.

The Platon P8 Waterproof Membrane Kit can be purchased in 10M², 20M² or 40M² sizes, use the drop-down box option below to choose your preferred kit size.

A full table of each Membrane Kit Contents is shown below in the 'Description' Tab.

  Platon P8 is supported by BBA Certification Certificate Number 01/3823.

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Platon P8 Basement Tanking Membrane Kit

Platon P8 is a BBA Approved, 8mm Stud, Basement Waterproof Tanking Membrane.

Platon P8 Cavity Drain Membrane is manufactured from high-density polyethylene (HDPE) for use within System Platon, Isola's internally applied Waterproofing System that includes the Aqua Channel Drainage System and Aqua Pumping Systems.

Platon P8 impermeable and resistant to the usual chemicals in the building construction. Studs are formed in a regular pattern on the one face of the product. The studs are spaced at approx. 25mm centres in both directions. 

Platon P8 is CE marked in accordance with EN 13967 and EN 13984. A separate declaration gives values for several characteristics.

Platon P8 membrane is tough but pliable and can be bent round corners and projections without risk of breaking, even in very low temperatures. The product can be easily cut with a knife or scissors.

Kit Contents:

Platon P8 Tanking Membrane Kit
Kit Size Membrane Roll Size No. of Fixings No. of Waterseal Tape No. of SDS Drill Bits
10M² Kit (W) 2.0M x (L) 5M 30 x Platon Brick Plugs & Seals 1 Roll of Platon Sealing Tape
(W) 30mm x (L) 20M
1 x SDS Bit
(W) 10mm x (L) 160mm
20M² Kit (W) 2.0M x (L) 10M 50 x Platon Brick Plugs & Seals Roll of Platon Sealing Tape
(W) 30mm x (L) 20M
1 x SDS Bit
(W) 10mm x (L) 160mm
40M² Kit (W) 2.0M x (L) 20M 100 x Platon Brick Plugs & Seals Roll of Platon Sealing Tape
(W) 30mm x (L) 20M
2 x SDS Bits
(W) 10mm x (L) 160mm

Technical Data:

Membrane Material HDPE
Sheet Thickness Nominal 0.50mm
Stud Height Approx. 6.5mm
Construction Height Approx. 7mm
Unit Weight 0.45kg/m²
Deformation Under Long Term Loading Max. 20% (at 50 kN/m²)
Compressive Strength 150 kN/m²
Working Temperature -10° to +60°C
Softening Temperature +160°C
Linear Coefficient of Thermal Expansion 0.18mm/m.°C
Water Vapour Resistance 280m equivalent air layer
Air Gap Volume 4.0L/m²
Drainage Capacity Approx. 3.8L/m²
No. of Studs (Approx) 1640 per m²
Life Expectancy At Least 50 Years for Defined Applications
Colour Natural

Platon P8 is CE marked in accordance with EN 13967 and EN 13984. A separate declaration gives values for several characteristics.

Membrane Suitability:

Platon Cavity Drain Membrane can be applied to almost all sound building structures below ground, which are affected by dampness or water ingress. However, they are not recommended for installation in the following situations.

  • Where the Cavity Membrane System cannot be drained, otherwise the system will fail.

  • Fixed onto internal flat soffits unless the soffit has an existing fall or a fall can be formed at the design stage (in the case of new build construction) or created using sand & cement renders, otherwise water would pond behind the membrane and build up like a balloon. The weight of water would inevitably burst the membrane seals, which are not designed to hold water under pressure.

  • Under or on top of concrete/stone staircase treads and risers, because of the many convoluting junctions and angle details. In such circumstances, we recommend they be treated independently using an epoxy vapour barrier.

Ingressing Water:

Platon Cavity Drain Membranes are capable of dealing with (quite) large volumes of water, so ingressing water will not usually require remedial action. But if the flow rate is such that it will be able to carry silts/dissolved lime with it, then this inflow should be stemmed/controlled prior to fitting the membrane. This can be achieved as follows.

  • If ingressing water is localised then the application of Water-Stop Plugging Compound will often be sufficient.

  • If ingressing water is more general and cannot be dealt with by localised plugging, consideration should be given to applying a general coat of 3:1 render incorporating an accelerator in the mix.

When water is flowing through concrete or mortar (particularly when it is new) there is a tendency for dissolved lime to be brought into the cavity.

This lime can then come out of solution and block up cavities and drains. If this is a risk, then the source of water ingress needs to be treated in the same way as silt bearing water, as described above.

NB: Regardless of conditions at the time of inspection, BS 8102 says it must be assumed hydrostatic pressure is going to occur at some time during the lifetime of the basement. This means that some form of water removal system must always be fitted with a Platon Cavity Membrane in below ground structures.

Drainage Types:

There are two principle forms of drainage, these are natural (gravity) and mechanical (sump & pump) and can be used in conjunction with falls or drainage channels.

However, when assessing the type of drainage facility to be used and because the drainage is the key to the success of the cavity membrane system, it is important to take into consideration the following points.

Natural - (Combined Foul Chambers & Integral Gullies)

Where drainage with gravity is feasible within the bounds of the property or at a point of exit from the property, it is most important to establish that the ‘internal drainage’ is in good working order and to question whether the local drains are connected to public drains or a soakaway.

Drains can and do block up or back up causing flooding, including escape of foul waste and pungent smells.

Soakaways can also fill up during periods of heavy rain, which would lead to flooding and failure of the cavity membrane system.

In situations where the Platon membrane installer finds that the only possibility of draining the cavity membrane is into a foul / soakaway system or his client so instructs, liability for the waterproofing system should therefore be excluded in the event of blockage of the foul pipes or the soakaways filling up. We, and the products Manufacturer, always recommend the inclusion of sump and pumps.

Mechanical - (Sump & Pump)

Platinum Chemicals offer an off-the-shelf sump and pump drainage system, The Aqua Pump Range and ‘Aqua Pump