Veteran Owned - Professional Service

What is efflorescence (efflo) and why is it more common on my front porch or back patio?

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The salts within the stones wick to the top when moisture exposure is constant. This white film is called efflorescence or “efflo”. Typically, when a home is built, the front porch or back patio is a concrete slab. If the homeowner decides to add a pool or paver patio, the paver contractor installs thin set pavers over the concrete slab to match the thick pavers elsewhere. The pavers laying directly on sand and soil naturally allow moisture to evaporate much faster. But the thin set of pavers sitting on concrete cannot dry out as quickly as the thick pavers because the moisture gets trapped in between. This constant exposure to moisture provides the perfect recipe for more efflorescence.