Substructure Waterproofing

IKO Permatec Substructure Waterproofing system provides a “protected membrane” system which usually incorporates a drainage board. IKO Permatec ECOwrap is fully bonded to the “POSITIVE” side of the structure, usually concrete and covered with an IKO Plasdrain drainage board and then structural concrete, backfill etc to suit performance criteria. Note: IKO Permatec cannot be used on the “NEGATIVE” side of the structure (eg. the inside of basements etc).

IKO Permatec ECOwrap provides a flexible fully bonded monolithic waterproofing system to flat or vertical substrate surfaces. Details (upstands, abutments and penetrations etc) are fully bonded into the IKO Permatec system ensuring total security.

Substrate Waterproofing designs often include the vertical surface of external walls of underground car parks and storage areas. A vertical drainage board is recommended to provide drainage and protection for the vertical waterproofing. A drainage system should be incorporated at the base of the wall to allow for the free flow of any water built up in the ground.

  1. Concrete deck primed with Permatec Primer
  2. 2 coats of Permatec Anti-Root incorporating Permaflash-R reinforcement
  3. Permaguard-F protection layer
  4. Drainage mat
  5. Backfill
20 Year System Guarantee

Substrate preparation
The surface of the substrate (usually concrete) should be suitably prepared to accept the Permatec fully bonded system. Joints, cracks or interfaces between different substrate materials should be detailed in accordance with Permatec Standard Drawings and Masterspec 4414AP specification.

Using a suitable spreader or squeegee, the first coat of hot Permatec Anti-root compound is applied to the prepared substrate at a nominal coat thickness of 3mm. The Permaflash-R polyester reinforcement is brushed into the Permatec Anti-root compound whilst it is still hot. All laps in the Permaflash-R should be at least 75mm wide and fully sealed with the Permatec compound. The second coat is applied in the same manner ensuring complete coverage of Permaflash-R at the nominal coating thickness of 3mm. The second coat of Permatec Anti-Root must be protected.

Permaguard-F sand surfaced bitumen membrane is the standard protection layer. It is applied directly to the second coat of Permatec whilst it is still hot and tacky. It is used on the vertical or horizontal area which is to be subsequently covered with a range of system components such as protection/ drainage layers. The Permaguard-F protection layer should be rolled into the hot Permatec as quickly as possible. Laps in Permaguard-F to be minimum 75mm and sealed using hot Permatec compound.

Extraordinary loadings may require an additional protection layer of Permaguard-M slate surfaced bitumen membrane, applied by controlled torch application. Contact Apshaltech Ltd for details.

Permaguard-HDPB (Heavy Duty) or Permaguard-PB protection boards can be used to provide additional protection to the waterproofing system. They are installed butt-jointed to the second coat of Permatec compound. Joints are taped over with 75mm reinforced adhesive tape.

In the event that a rainwater outlet detail in the waterproofing system is required. Use Permatec Standard Drawing details or contact Apshaltech Technical Services for advice.

System components
A standard Permatec system will include a range of system components including: protection/drainage layer prior to the installation of the backfill material or loading coat material (concrete etc).

Substructure Waterproofing Masterspec Documents

Substructure Waterproofing Technical Documents

Substructure Waterproofing System

Fabric Apartments, Onehunga

Fabric Apartments, Onehunga