Note, properly installed, a Kerdi install does NOT have weep holes, since the surface membrane is sealed to the drain.no moisture ever gets beneath it. My guess, and it is only that, is that they've chosen to switch to a less expensive source. I've not heard of any failures with the Kerdi stuff. The ProVaMat drain has a screw in application that allows for proper weeping and greater support it als has a square drain, our contractors are changing the provamat system at a rate of 8-1.
I would eliminate this by putting concrete in this area to keep the center cup from making direct contact with the drain body, it also gave me confidence the drain cup would not collapse under the weight of a person showering. The schluter cup once place in the drain body will seal to the body surface when pressure is applied form installation, this allows moisture to build around the drain insert and will create a stagnant pool that will draw mildew.
The provamat drain does allow for weeping right into the drain line.Īs I am sure you know weeping occurs when condensation and hydrostatic pressure builds in the thinset and will weep around the sides of the drain. The floating application of the Schluter drain always made me worry that one large person in the shower could stand on the drain center and collapse the whole thing then I would face a lawsuit, we also had reports of them failing,they do not allow proper weeping. I sold and installed the Schluter drain for four years, the ProVamat drain is better in all ways, it is easier to work with and better designed, we do not however have it in brushed nickel.
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