Concrete blocks
Showing results 1-12 of 31
Rust stains on concrete/concrete block foundation walls
-
Poor quality concrete absorbing water that rusts the reinforcing, which in turns causes the concrete to spall or crack, allowing in more water
-
The reinforcing was installed too close to the outer surface of the concrete
-
The building is close to the sea and the concrete is of poorer quality
-
The concrete is low strength
-
Moisture is rising up from the ground
Rust stains on inside of foundation walls
-
Poor quality concrete absorbing water which rusts the reinforcing, which in turns causes concrete to spall or crack allowing in more water
-
Reinforcing installed too close to the outer surface of the concrete
-
Low strength concrete
Moisture entry through retaining foundation walls
-
Ground moisture has moved through a retaining wall as it is unlikely the wall will have been waterproofed, and there is: no perforated drainage pipe at the base of the wall for ground water removal no drainage gravel above the drain, resulting in the drainage pipe becoming blocked with silt no filter fabric between drainage gravel and the drain, resulting in the drainage pipe becoming blocked with silt the drainage behind the wall has stopped working due to the pipe being blocked or the drainage gravel becoming filled with fine soil material
Concrete/concrete block – plaster finish sounds drummy
-
Loss of bond between plaster and masonry
Concrete/concrete block – stains
-
External moisture entry through a wall (above ground)
-
Ground moisture moving through the wall that is below ground
-
Efflorescence
-
Piping leak
Concrete/concrete block – interior flaking paint
-
External moisture entry through wall (above ground)
-
Ground moisture moving through a basement wall
-
Efflorescence
-
Leaking pipe within wall
-
Leak around windows or doors
Lightweight aerated concrete panels/blocks – joint cracking
-
Movement causing loss of adhesive bond
Lightweight aerated concrete panels/blocks – chalking paint
-
Weathering, UV light exposure – chalking will be more visible with darker colours
Lightweight aerated concrete panels/blocks – fading paint
-
Weathering UV light exposure – darker colours are more prone to fading
Lightweight aerated concrete – peeling or flaking paint
-
Weathering UV light exposure – darker colours are more prone to fading
-
Loss of adhesion due to excess moisture in substrate
-
Poor initial substrate preparation
-
Oil-based (alkyd) paint applied over water-based (acrylic) paint
-
Surface was damp or dirty when painted previously
-
Dark colours
-
Paint coating at end of serviceable life
Lightweight aerated concrete – bubbling or blistering paint
-
Loss of adhesion due to excess moisture in substrate
-
Poor initial substrate preparation
-
Oil-based (alkyd) paint applied over water-based (latex) paint
-
Surface was damp or dirty when painted previously
-
Dark colours increasing surface temperatures
-
Water-based paint coat exposed to moisture before paint has fully dried
Lightweight aerated concrete – paint failure at base of walls
-
Cladding covered by soil/foliage
-
Concrete has been placed up to and against cladding
-
Bottom of cladding too close to waterproof deck surface, apron flashing and absorbing moisture