Wood Blinds and Sun Exposure: Preventing Warping

Dive into our blog for valuable insights on shutters and blinds. Stay updated on industry trends, tips, and inspiration for your window treatments.

Do wood blinds warp in the sun? This is perhaps one of the questions that you, as a homeowner, have wondered. This article will dive deep into this question, giving you the answer and so much more. From the different types of wood blinds, to the installation; this article will give you everything you need to know.

Do Wood Blinds Warp in the Sun

Types of Wood Blinds

  • 1. Real Wood Blinds:
    • These wood blinds use the finest wood available in nature including oak, cherry and basswood.
  • 2. Composite Wood Blinds:
  • 3. Faux Wood Blinds:
    • The material used here is the poly-vinyl Chloride (PVC).

Factors Affecting Warping in Wood Blinds

  1. Material Used

The material used to make the blind in relation to different conditions will determine whether it will warp or not.

  • Wood Blinds
    • Natural wood blinds withstand direct sunlight and heat better. The North American hardwood or basswood, in this case, is the best. Natural wood has a lot of moisture and therefore it goes through a long drying process. Basswood is very good because it can be dried optimally without getting brittle.
    • Wood blinds are excellent for several area windows except for high-humidity spaces like the laundry, kitchen sink and washroom windows. Moisture will negatively affect the wood in the long run.
  • Composite Wood Blinds
    • The center of these blinds are plastic and materials are added to make them sturdy. This prevents them from warping with excessive heat and sunshine.
    • The off-white or white color slats are the best because they have big resistance to warping. Avoid darker color slats. The lighter color ones facilitate less heat absorption.
    • These blinds are very good in regards to moisture, they are easy to clean and care for. One can use a moist cloth to wipe it clean and they will not be affected. They are good for high-humidity areas such as laundry, washrooms and kitchen.
  • Faux Wood Blinds
    • PVC which is a thermoplastic is used here as the core material. This PVC is known for its high durability, fiber resistance and strength to weight ratio.
  1. String Spacing for Blinds

Proper string spacing prevents warping. Strings/ ladders hold the blind slats in its position and allow us to open and close the blinds with leisure. String spacing is the distance between one string and another. Among the three types of blinds, the wood blind is the lightest. This means that wood blinds require less support and the string spacing is as wide as twenty-four inches. Wood blinds give better aesthetics as a result because several middle-strings don’t block the view. The string- spacing for faux wood blinds is 11 inches and for composite wood blinds is 14 inches.

  1. Blind Width and Installation

There are main brackets which keep the blind secure. Some window sizes require that you have one or more center-support brackets. A professional installation ensures that the right number of support brackets are fixed and are located in the right position. Without this, the end brackets will start to loosen. The head-rail sagging will transfer to the slats and the slats will start to look warped.


Proper installation, hardware and materials all contribute to helping keep your blinds warp-free.  We hope this guide has answered your questions about wood blinds warping.  What ever type of blinds you chose for you home, we offer free in-home measuring and professional installation.

Some blogs are written by authorized members of our advertising team for marketing purposes only. Some content may not correctly depict product specifications and may vary depending on product. For more information please call our sales office.

Beautiful and Great Experience

"Great quality and value for money. Installers were on time, finished the install quickly, gave us instructions on how to use. Very satisfied."

Marion P.
Covering windows in Arizona for over 25 years and counting.