Moisture vapor transmission causing bubbles and delamination
Why it happens here
Riverport sits close to the Fraser River, and the water table plus year-round humidity pushes moisture vapor up through concrete slabs. Older buildings often have no vapor barrier under the slab, so the problem is worse. Any coating that cannot tolerate that vapor will fail.
Our approach
We take moisture meter readings at multiple points before quoting, and we specify a moisture-tolerant primer or a breathable system when readings run high. In severe cases we recommend a vapor barrier before any coating goes down. It costs more upfront and saves a full redo later.