What is waterproofing?
At the pointy end.
TPO and PVC sheets will resist oxidation for around 20 years, electrical lap and seam testing is required.
When the sheets are only partially bonded these membranes are prone to punctures followed by water entrapment that cause extensive damage to buildings and infrastructure.
Application error is a big issue with this type of waterproofing system in general.
A waterproofing product is defined by the material's ability to hold water.
Generally two part polyurethanes will resist water and oxidation, lasting for around 20 years.
polyester membranes are a rigid type using polyester resin and fibreglass mesh as the reinforcement.
The polyester is a two part system based on a resin formed from an acid anhydride, and with a peroxide catalyst to cause the resin to harden.
This is the same ubiquitous resin used for rapid production of fibreglass pools, car parts, yotts, tanks AND SO MUCH MORE.
Polyester forms a hard and impermeable seamless surface which is chemically inert.
The biggest advantage of this arrangement of waterproof product is repairability.
There is no need for replacement when installed correctly.
What is water - resistance
A water resistant product defined in its entirety, repels water to some degree for a short amount of time, anywhere from 1 year up to 10 years.
Water resistant products are plagued with a myriad of technical issues and curing difficulties outside of a controlled environment.
Tests in a laboratory or workshop differ from construction site application.
Solvent based polyurethane single part semi elastic coatings that "must be applied in an ideal environment", will not cure in high humidity for up to 7 days.
There is difficulty whe removal is required upon failure of polyurethane products
Various amounts of petrochemical plasticised compounds that are used in these products are non biodegradable.
Roughly 80% end up in landfill within a decade.
Water based acrylic - water based latex rubber emulsions - water based cement and acrylic emulsions, water based emulsion substitute for waterproofing that are only good on walls and do not stay water resistant when exposed to pooling water.
Bonding to various substrates including to its self is a challenge as there is no real interlaminar adhesion.
Fillers and aggregates used for bonding are not waterproof.
Oxidation of these products before a solid 10 years can be reached may change your opinion of them as less desirable for use in any circumstance where water and oxygen immersion is present.
Even though three quarters is inevitably removed for disposal.
The waterproofing paint compound industry SCOURGE is bent on selling the lesser water resistant products with the label waterproofing.