Joist Decay
Top
The untreated pine wood on this Pergola patio cover was rotting and decaying. Untreated pine lumber is not suitable for outdoor use. Even treated pine that is properly stained can eventually decay. Cedar or composite woods are the best choice for exposure to the elements in our harsh Midwest climate here in Omaha and Elkhorn NE.
Why Pergola Material and Stain Choice Matters
Pergolas take constant sun, moisture, and seasonal temperature changes. Using the right wood type and the right stain system helps prevent premature rot, cracking, and peeling. Proper preparation and allowing new wood to dry before staining are key steps for long-term protection and a consistent finish.
- Notice the decay of the untreated pine pergola
- The original pergola was weak due to its poor design
- The new cedar pergola was built almost identically except for the cross-braces which more than tripled its strength
- New wood should be allowed to dry up to a year to allow for full penetration of the stain
- Always use an OIL-BASED stain to reduce the risk of future peeling
- Oil-based stains cannot be applied over latex-based stains
Our Pergola Building and Staining Approach
Inspect the Existing Structure and Identify Rot or Weak Points
Recommend Materials and Design Improvements for Strength
Build or Repair with Proper Joinery and Bracing
Prep Surfaces for Even Absorption and Long-Term Performance
Apply the Right Stain System for Your Wood Type and Maintenance Plan
If you are looking to have a Pergola sunshade designed, built, repaired or stained call Scott's Painting & Staining Inc. today for a free design consultation and estimate. We can offer various solutions for all budgets, and will let you know which option is the best long-term solution based on your budget and maintenance plans!
Visit our Pergola Staining Services page for a complete list of Pergola, Deck and Fence Staining Services.
Rotted Pine Wood Pergola
Pergola Redesigned Cross Brace
Rebuilt Pergola in Decay Resistant Cedar
Cross Brace
Cedar Pergola
Pergola Building and Staining FAQs
Why is untreated pine a bad choice for an outdoor pergola?▼
Untreated pine is not designed for long-term outdoor exposure and can absorb moisture quickly, which increases the risk of rot and decay. In Omaha’s Midwest climate, pergolas need materials and protection systems built for the elements.
Is cedar a better pergola material than pine?▼
Yes. Cedar is naturally more resistant to moisture and decay than untreated pine, and it performs well outdoors when properly built and maintained. We can recommend the best material for your budget and goals.
How long should new wood dry before staining?▼
New wood often needs time to dry so stain can penetrate properly. Depending on the wood and exposure, drying time can vary, and we can advise what is best for your specific pergola before staining.
Why do you recommend oil-based stains for pergolas?▼
Oil-based stains are designed to penetrate into the wood and typically perform well outdoors. They can provide durable protection and reduce the risk of peeling when the correct stain system is used for the surface and prior coatings.
Can oil-based stain be applied over a latex-based stain?▼
Generally, no. If a pergola has a latex-based stain or coating, the surface usually needs the correct prep and compatibility checks before switching stain types. We can evaluate the existing finish and recommend the safest approach.