Waterproofing is a broad term in the construction world.  The distinctions of above-grade and below-grade pretty well sum up the offerings out there.  But when considering chemical grout’s place in the waterproofing world, we primarily stick to below-grade applications. 

An understanding of what chemical grouts can and can’t do is a very valuable tool for any waterproofing or concrete repair contractor.  On many job sites, several systems are being applied across a variety of trades against costly and ambitious deadlines.  Most well-established manufacturers have all of the physical property testing, warranties, case studies, and approved applicator programs to get the job done.  Unfortunately, no manufacturer warrants against human error. 

What happens when an HVAC contractor or an electrician takes it upon themselves to drill a “little” hole for their penetration?  What happens when backfill operators “barely touch” an installed membrane system?  Or what happens when another contractor just “pushes or pulls a bit” to make a penetration detail work?  What often happens is very costly to the client and/or general contractor in both time and money.  Enter chemical grouts. 

In a hydrostatic condition, the smallest of failures can cause huge water infiltration issues.  Chemical grouts can be utilized in below-grade hydrostatic conditions, while providing a positive side repair applied from the negative side.  In all estimations, these conditions can be a nightmare for even the best waterproofing contractors.  As localized repair of the compromised membrane is achieved, often the hydrostatic pressures relocate, causing seemingly new leaks in other areas (when in actuality, it is the same small failure causing the bigger problem). 

Some advanced below-grade manufacturers are going the route of specifying pre-installed injection tube systems such as the Spetec ITS Kit in which leaks can be quarantined to specific areas of repair.  Chemical grouts such as Spetec AG200, Spetec PUR H100, Spetec PUR F400, and Spetec PUR H40 can then be injected into cracks, cold joints, and through injection tube systems. 

So, although some contractors may not associate chemical grouts with new construction waterproofing, these solutions definitely have their place to be at the pre-bid and design tables when discussing the waterproofing design.  To schedule an experienced technician for your next design meeting, please contact us today. 

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