Stego Wrap

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Author Message (Unregistered Guest) Unregistered guest Posted on Thursday, February 17, 2011 - 03:49 pm:    Has anyone here ever used Stego Wrap as a below grade waterproofing? Their website shows details that they can with the additional Stego Mastic. I always have used it as a below slab Vapor Retarder, but never as waterproofing. Their details call it out as waterproofing and vapor retarder. Richard Hird (Unregistered Guest) Unregistered guest Posted on Thursday, February 17, 2011 - 09:32 pm:    For many years I have used a "Heavier" vapor retarder/barrier (reinforced asphaltic kraft paper - Moistop) for below slab perched water (not a true water table) problem. Because it is heavier I get a firmer material for joint taping and better resistance against perforations during slab placing. You do need to use a rebar support system that will not puncture the material. From what I have seen of Stego it probably would work the same. It appears to be as puncture resistant as Moistop, but I do not know if the taping of the joints works as well. Regardless it is not a Waterproofing system. For water table hydrostatic heads you need a below slab waterproofing material on a mud slab so that all the joints, including the joint with the vertical waterproofing, are watertight. J. Peter Jordan (Unregistered Guest) Unregistered guest Posted on Friday, February 18, 2011 - 11:08 am:    IMHO, there are better vapor retarders, but I tolerate Stego because they are a proven product; I dislike their marketing tactics. I really don't see why it would not work as waterproofing for "non-water table" applications, but I would think that the joints pose a serious problem. If they are treating the joints with a product characterized as "mastic", I would be very careful. In my experience almost any sticky, viscous material (usually black) is called "mastic." There are some mastics out there that would destroy the polyethylene. What are the chemical and physical properties of Stego's mastic? If they say that it is a proprietary formulation and don't have testing from an independent laboratory to back up their claims; keep walking. Anne Whitacre, FCSI CCS Senior Member Username: awhitacre Post Number: 1119 Registered: 07-2002 Posted on Friday, February 18, 2011 - 12:32 pm:    how many years has this "system" been in place? I like the Stego product, but I would never consider it waterproofing, no matter what the location. Its a vapor retarder, maybe a vapor barrier... but unless it resists a head of water, its not a waterproofing membrane. John Bunzick, CCS, CCCA, LEED AP Senior Member Username: bunzick Post Number: 1304 Registered: 03-2002 Posted on Tuesday, March 01, 2011 - 11:14 am:    It sounds like there is a desire for a product that is a "semi-waterproofing" membrane. That is, something better than a vapor barrier without being as full-bore as a waterproofing membrane. I had these discussions in my office a number of times, where designers were asking for something like this. Kind of like "cheap waterproofing." I really don't know what that would be. One of the problems waterproofing products face is that there really aren't any measurable standards for the performance of a waterproofing membrane in the first place. (Or at least any that are in common use.) Maybe if there was a standard that had two grades: "lots of water, but hardly any pressure" and "both water and pressure" this request could be met. I'm not holding my breath. My view is: if you want to be sure to keep water out, use a real waterproofing membrane with proven experience. Ron Beard CCS Senior Member Username: rm_beard_ccs Post Number: 375 Registered: 10-2002 Posted on Tuesday, March 01, 2011 - 01:15 pm:    Just curious. Is semi-waterproof the same as half-pregnant? "Fast is good, but accurate is better." .............Wyatt Earp Lynn Javoroski CSI CCS LEEDŽ AP SCIP Affiliate Senior Member Username: lynn_javoroski Post Number: 1211 Registered: 07-2002 Posted on Tuesday, March 01, 2011 - 01:41 pm:    Probably not...being semi-waterproof might have prevented the half-pregnancy.