Glass blocks
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Glass block cracking in mortar joints
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There is insufficient allowance for structural movement around the glass block panel
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Wall has inadequate strengthening to withstand the imposed structural loading
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The panel is not able to resist the imposed wind loading
Glass block leaking at joints
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Poor quality mortar
Glass block crumbling mortar
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Mortar dried too rapidly during installation
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Poor quality mortar
Glass block cracks
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Impact damage
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There was insufficient allowance for structural movement around the glass block panel
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The wall has inadequate strengthening to withstand the imposed structural loading
Glass block stains
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Alkaline run-off from cement mortar such as an external wall or where the glass block wall is part of a shower