Scratches and small cracks

Small holes

Large holes


Good to know about weatherproofing

When to replace seals?

Why to replace seals?

Choosing the correct seal

Checklist for weatherproofing

The most common mistakes in weatherproofing

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When to replace seals?

You should check the weatherstrips' condition annually when you wash the windows or at minimum once every five years. The seals should usually be changed between 5-40 times during the windows'/doors' lifetime, depending on the quality and material of the seals. When you replace the weatherstrips you should check the strips' durability - there are concrete differences between materials and quality. 

Durability of materials (RK Seals)

  • PU-Seal (so called dust seal / foam seal) – 0,5-2 years
  • EPDM-Seal (most common consumer seal) – 4-8 years
  • Silicone Seal (track or omega seals) – approx. 15-20 years
  • TPE -seal (environmentally friendly, track seals) – 12-15 years

Hints on when to replace weatherstrips

  • dust and soot in seals (leak or too narrow seal)
  • water and snow between windows (leak or too narrow seal) 
  • ice or vapour inside outer window (inner seal too narrow or old) 
  • vapour in inner glass (no seal in outer window, high air moisture percentage, curtain or lots of flowers in front of window, weak deaeration or no replacement air valve)