Patio joints loose, cracking or washing out
Why are my patio joints washing out?
Weather exposure, movement and poor joint materials cause patio joints to erode over time. Once joint material begins to break down, water penetrates the gaps and accelerates deterioration.
What causes patio joint failure
Common causes include:
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Freeze–thaw cycles
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Poor drainage
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Weak original mix
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Movement in the sub-base
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Incorrect installation
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Even well installed sand/cement joints eventually degrade under weather exposure.
Could it be a deeper structural issue?
Sometimes loose slabs are caused by bedding or sub-base failure rather than just joint erosion. If slabs are rocking or uneven, the issue may extend beyond the surface jointing.
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Proper assessment prevents temporary repairs.
Why patio problems worsen over time
Open joints allow more water to penetrate beneath slabs. As movement increases, joint gaps widen and slab stability reduces.
What issues failed patio joints can cause
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Loose or rocking slabs
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Weed growth
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Water pooling
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Surface staining
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Trip hazards
How we repair patio joints properly
We remove failed material and carry out professional patio repointing and repairs suited to the patio type and exposure level.
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Where necessary, we carry out targeted stabilisation of affected areas.
Frequently asked questions
Can patio joints just be topped up?
Surface topping rarely lasts. Failed material must be removed properly.
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Does this mean I need a new patio?
Not usually. Many patios can be restored without full replacement.
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