New Projects
Be aware that complex structures and/or foundations present numerous waterproofing challenges for any new construction waterproofing project. Waterproofing membranes (particularly sheet membranes) can be difficult to conform and bond to structures and/or foundations with non-uniform corners, transitions, or changes in elevation or slope.
A dewatering system can be used temporarily during construction or as a permanent component of the waterproofing solution. Water and moisture are allowed to flow through the concrete in the presence of the dewater system, and the system collects and moves the water away from the structure. Permanent dewatering systems can be used for low-risk projects or in conjunction with waterproof concrete or pre-applied waterproof membranes for higher-risk projects. They are not recommended for environments with soil contamination because they do not prevent gas vapours from entering the structure.
Restoration/Replacement Projects
Restoration/replacement waterproofing projects can be more difficult due to a variety of structural issues as well as the condition of the substrate and/or previously applied waterproofing systems. Waterproofing is applied to substrate surfaces to protect them from structural deterioration caused by water, chemicals, and soil. The waterproofing material used must also be capable of performing if the substrate becomes unstable or minor imperfections occur.
The most difficult task is locating a waterproofing material that is compatible with the existing substrate. Some substrates are naturally prone to imperfection, which should be considered before designing a waterproofing system. Waterproofing membranes applied over substrates prone to cracking from any source must be elastic and resealable. Cracks in masonry or other waterproofed components with multiple construction joints can occur.
