Insulation-companyspecialist Rakwana
Mason · Rakwana
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Masonry along the Dehiwala and Mount Lavinia coast has to contend with salt and a high water table. Salt in the ground and in the air attacks reinforcement and causes plaster to blow at the base of walls.
Use proper cover to reinforcement and a good damp-proof course on any coastal build here. Salt reaching steel makes it expand as it corrodes, which cracks the concrete from inside. It is invisible for years and then very expensive to fix.
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Frequently asked questions
Questions about finding a tradesperson in Dehiwala-Mount Lavinia? Here are the answers homeowners ask most.
Rising damp carrying salt. As the water evaporates the salt crystallises behind the plaster and pushes it off. Replastering without addressing the damp-proof course repeats the job within a year or two.
It needs proper cover to the steel and well-compacted, correctly mixed concrete. Thin cover and porous concrete let chlorides reach the reinforcement, which is the main cause of premature structural damage near the sea.
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Indicative 2026 rates for Colombo and the suburbs, based on Snapwerks quotes and published Sri Lankan market data. Outstation districts usually run 10-20% lower on labour. Expect the top of each range during the Avurudu rush in March and April and at the start of the monsoon. Always get the scope and the price in writing before work starts.
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