Expert advice
Signs window and door sealant needs replacing
How to spot failed perimeter joints and when to investigate further.
Look for cracking, gaps, loss of adhesion and water marks around window and door frames. Not every draught or leak is caused by the perimeter seal.
External sealants must suit the substrate, expected movement and exposure. A clean finish alone does not guarantee weather resistance.
Before resealing, investigate drainage, flashing and frame defects where relevant, and ensure the joint is accessible and suitable for replacement.
Related services: Shower resealing · Bath resealing · Silicone replacement · Maintenance