Understanding the Challenges of Exterior Wood 

Moisture 

UV Sunlight and Heat 

Changes in Temperature 

Wood is affected by many factors, including moisture, which causes swelling, rotting, mold and mildew

Wood is also affected by UV sunlight and heat, which promotes shrinking, cracking, graying, fading and warping.

Wood is affected by changes in temperature, which results in expansion and damage to wood fibers.

Wood Chemical Composition 

Mildew 

Rot 

Sikkens Translucent Wood Finishes are designed to protect the woodgrain from damages caused by UV sunlight.

Mildew can result when the following conditions are present:

  • 21% moisture content
  • 21ºC (70ºF) temperature
  • 80% relative humidity
    •

    If moisture content remains above 30% and temperature is above 21ºC (70ºF), rot may begin.

    When rot is present, the only real solution is to remove and replace the damaged areas. This can be a costly undertaking and can usually be prevented with proper maintenance and visual inspections.