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Painting Exterior Wood

 
 
 
Exterior Wood
 
  • Wood is considered an unstable surface for painting because changes in humidity and temperature can expand and contract the wood, and create an uneven surface or cracks in the paint.
  • It is critically important that the paints and primers you choose offer some degree of flexibility to also expand and contract.
  • Paints and primers formulated with acrylic resins are excellent choices for wood surfaces because they offer coating flexibility.
  • Surface preparation is very important when painting exterior wood surfaces; for instance, all openings where moisture can get into the wood—such as gaps, holes and cracks in individual boards or between boards—must be closed off. Adjoining surfaces such as windows, doors and trim need to be caulked. Certain types of wood (e.g. cedar, pine or fir) are known to “bleed” and therefore need to be properly Primed before applying a top coat, using an oil based or acrylic primer formulated to block stains.

 
 
 
 
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