Building Management Hawaii December/January 2014 - (Page 28)
Challenges of waterproofing buildings
below-grade and at sea level.
By Richard Malmgren
eeping a two-story basement dry in Waikiki can be a
challenge. Depending upon the daily tide level and
specific location, the water table is often less than five
feet deep; consequently, most Waikiki basements will
experience water infiltration through the perimeter walls
and often through the slabs.
The exterior walls of this featured building
were originally waterproofed using bentonite clay.
Possessing good impermeability due to its expansive
nature in a hydrated state, leaks can nonetheless occur
for various reasons.
At this project, water infiltrated through below-grade
concrete walls at both cold joints (the interface between
two different concrete pours) and shrinkage cracks, as
well as through the wall/slab interface. Infiltrating water
sometimes conveyed bentonite to the inside surface of the
walls, depositing tell-tale streaks on the wall face.
Wishing to curtail future water infiltration, the
owner's design architect engaged a waterproofing
December 2013 - January 2014
Table of Contents for the Digital Edition of Building Management Hawaii December/January 2014
Signs & Safety How Do I Get Out Of Here?
Signs Of A Safe Building
A Sign From The Feds
Water Savings Coming Clean With Recycled Water
Water & Energy: Two-For-One Savings
Solar Hawaii’s Leaders In Solar
Waterproofing Cementious Coating Vs. Polyurethane Foam
The $1 Million Mistake
Seal The Deal
Resin Injections Save Basement
Waste Management Keeping The Trash Industry Clean
Assistance Animals Making Room For Rover
Green Cleaning Be Green: Resources & Tips
Building Management Hawaii December/January 2014