09/07/2026
Be careful â big companies arenât always the best.
A big logo and a big following donât guarantee good damp proofing. In fact, weâre seeing more and more posts online where the work simply isnât done correctly⊠and the customer wonât realise until the damp comes straight back.
Poor preparation. Wrong materials. No diagnostics. Plaster straight over wet substrates.
It looks fine for a few weeks â then the problems return.
And hereâs something homeowners rarely get told:
âFree surveysâ are almost never free.
If a company isnât charging for proper diagnostics, it usually means youâre paying for it somewhere else â rushed assessments, mis-selling, or being recommended work you donât actually need.
At Sealtight UK, we do things differently because damp proofing isnât guesswork.
Our approach:
Proper diagnostics â moisture mapping, salts testing, ventilation checks, and identifying the real cause.
Correct materials â not generic tanking slapped on every wall.
Full substrate preparation â removing contaminated plaster and treating salts properly.
Ventilation-first thinking â because damp is often a building behaviour issue, not just a wall issue.
Transparent, paid surveys â honest diagnostics, no mis-selling, no hidden costs.
Good damp proofing isnât fast.
Good damp proofing isnât cheap.
Good damp proofing is correct â and thatâs the difference.