Home Stretch Membrane is designed and recommended for typical below-grade waterproofing over a variety of approved substrates, but the sheet membrane waterproofing system can be continued on above-grade walls on a very limited basis. 

The approval criteria for continuing the Home Stretch Membrane sheet waterproofing system from below grade to top of above-grade wall(s) include the following: 

1. The approved above-grade wall substrate shall be only Insulated Concrete Forms (ICF), not concrete or traditional framing with sheathing.
2. The 30-day UV exposure limit on Home Stretch Membrane must be strictly followed. For an extended UV exposure limit up to 24 months, the UV2-40 (Formerly Aluma Flash Plus) sheet air barrier system is available for your review and consideration.

The Polyguard below-grade waterproofing systems require a vertical concrete substrate (i.e. foundation wall) to have a maximum moisture content of 10%, and a horizontal concrete substrate (i.e. footer) to have a maximum moisture content of 5%. 

This requirement is to ensure proper adhesion/bond, while also preventing the Polyguard Stretch Flex (fluid-applied) membrane from developing surface blisters due to sunlight heating the substrate wall and/or footer and cause latent moisture to move within the concrete.