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The Waterproofing Problem
Water can permeate through incorrectly applied or damaged membranes and can also pass over and under a sound membrane that is not detailed correctly.
Evidence of waterproofing service failures can include:
- Damp areas and fungi growth in adjoining rooms
- Wet carpet with mould growth, fungal decay or staining
- Degradation of structural timbers and ceilings
- Strong musty odours
- Moisture droplets or staining to sub floor timbers such as bearers and joists under or adjacent to wet areas
- Rising or penetrating damp in walls adjacent to wet areas
Causes of waterproofing failure could include
- Poor bathroom design
- The use of an inappropriate or inadequate waterproofing system
- Incorrect installation or application by the waterproofing contractor
- No written instructions or training provided with the membrane system
- Lack of supervision or quality control particularly in preparation of the substrate
- Incorrect positioning of the installation of the shower screen
- Waterstops for hobless showers being too low
- Incorrect selection, installation or lack of a bond breaker
- Incompatible bond breaker or filler joint
- Sealant incompatible with waterproof membrane
- Damage to membrane after installation
- Omissions of sealant around shower screen fixings (Reference: MBA Guide to Internal Wet Area Waterproofing)
Termidry Waterproofing Service
Internal Wet Areas
The Termidry waterproofing system uses only premium grade materials supplied by proven manufacturers. The key features include:
- Approved Class Ill membranes to AS4858 for internal wet areas allowing for maximum performance and movement
- Comply with the performance requirements of the 2022 National Construction Code
- Excellent chemical resistance
- Low VOC content
Durable Solutions for Every Structure
Retaining Walls – Positive:
Bitumen based waterborne membrane is used for standard walls.
Specialised retaining wall products allowing for potential movement in walls or where exposure to UV is anticipated.
Retaining Walls – Negative:
Two-component membrane specifically designed for negative side waterproofing.
Creates an effective barrier against waterborne salts and provides a hardwearing seamless waterproof membrane.
Water Tanks:
Products have been tested as suitable for collection and storage of drinking water in accordance with AS4020.
Podium Decks, Balconies and Roof Decks:
Products used include highly flexible UV resistant membranes or high performance synthetic rubber based membranes that are designed to offer long-term UV and weather resistance to exposed areas subjected to ponding and permanent immersion.
Crack Injection:
Single component hydrophilic polyurethane in combination with specialised polyether polyols are designed to only react when in contact with water to form a flexible polyurethane seal.
What Termi H&C customers say
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