Cold Applied Liquid Waterproofing Membrane for Basement Foundation
Looking at finalizing the specifications for my basement foundation. Have looked at many of the details and articles here and elsewhere are will add capillary break between footing and foundation along with adequate drainage pipes, crushed stone, fabric at the foundation (likely outside and inside) with sump system and pumps. Continuous insulation inside the basement.
As for waterproofing, I want to specify a cold applied liquid waterproofing membrane before a dimple drainage mat. I’ve seen Tremco Tuff-N-Dri mentioned here a few times as one having a tested hydrostatic head resistance. The upgraded version Tuff-N-Dri XTS has been tested to 12 ft of hydrostatic head, which would be the one I would use.
I then came across WR Meadows Mel-Rol LM in my research. They specify 48 psi which is 110 ft of hydrostatic head. Great! I thought. Then I started think, how can a similar asphalt based polymer modified liquid applied membrane have ten times the hydrostatic head resistance compared to the Tremco product? Is this too good to be true? The test for Tremco is ASTM D- 5385 which is the proper test. Mel-Rol cites ASTM D751 which is the test for a water resistant fabric. Mel-Rol also claims zero VOC which I find quite odd as the SDS lists asphalt and oil base stock as the main components.
I guess my questions are, has anyone used Mel-ROL LM before and is their claim of hydrostatic head resistance almost 10X of Tremco Tuff-N-Dri XTS too good to be true?
The product sheets and specs are attached.
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