Cavity brick/concrete block veneer – paint failure at base of walls

Paint failure at base of plastered and painted cavity brick/concrete block veneer walls

Causes

Cladding covered by soil/foliage

Concrete has been placed up to and against cladding

High subfloor moisture levels behind the cladding

Bottom of cladding too close to waterproof deck surface, apron flashing and absorbing moisture

Drainage from veneer cavity blocked   

Listed under: Exterior, finishes, concrete and cement, concrete blocks, masonry, brick, paint, Subfloor, cladding, decks, flashings, walls, moisture, wall cladding, cavity brick or concrete block veneer

Cause

Cladding covered by soil/foliage

Repair

  • remove soil/foliage covering cladding
  • scrape and/or sand off loose paint and clean until surface is sound; prime; fill joints with exterior grade flexible (polyester) filler; paint with a minimum two coats of paint appropriate for masonry

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Cause

Concrete has been placed up to and against cladding

Repair

  • break up and remove concrete
  • scrape and/or sand off loose paint and clean until surface is sound; prime; fill joints with exterior grade flexible (polyester) filler; paint with a minimum two coats of paint appropriate for masonry

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Cause

High subfloor moisture levels behind the cladding

Repair

  • scrape and/or sand off loose paint and clean until surface is sound; prime; fill joints with exterior grade flexible (polyester) filler; paint with a minimum two coats of paint appropriate for masonry

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Cause

Bottom of cladding too close to waterproof deck surface, apron flashing and absorbing moisture

Repair

  • engage a registered building surveyor to report on the building condition and repair options

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Cause

Drainage from veneer cavity blocked   

Repair

  • clean out drainage slots, scrape and/or sand off loose paint and clean; allow to dry; paint with a minimum two coats of paint appropriate for masonry

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