November 1, 2016
A pergola or gazebo is often one of the most valued features in a backyard. It creates shade, defines outdoor living space, and adds long-term visual appeal to your home. Like any outdoor structure, however, pergolas are exposed to sun, rain, wind, and seasonal temperature changes that can affect their appearance and performance over time.
With regular maintenance and the right restoration approach, a pergola can stay strong, attractive, and functional for many years. Below, we break down how to properly maintain your pergola, when restoration is needed, and how to tackle each step with confidence.
Maintaining a Pergola
Routine maintenance is the most effective way to protect your pergola from weather-related wear and extend its lifespan.
Traditionally, pergolas are built from durable woods like cedar, which naturally resist rot, insects, and moisture. Even so, outdoor exposure can gradually affect the surface and structure. Regular cleaning, sealing, and inspection help preserve both appearance and integrity.
How to Clean a Pergola
Cleaning your pergola removes dirt, pollen, mildew, and debris that can trap moisture and accelerate aging.
For most wooden pergolas:
- Use mild soap and warm water
- Scrub gently with a soft-bristle brush
- Rinse with a garden hose
Avoid using pressure washers on wood, as high pressure can damage the grain and force moisture deep into the boards.
Vinyl- or composite-coated pergolas typically require less maintenance, but mild soap and water are still recommended for periodic cleaning.
How to Apply a Waterproof Sealer to a Wooden Pergola
Applying a waterproof sealer helps protect wood from moisture, UV exposure, and surface wear.
Cedar, in particular, contains natural oils that resist decay and insects, but sealing the surface helps preserve its color and slow weathering. Clear or lightly tinted sealers allow the wood grain to remain visible while improving weather resistance.
Key tips:
- Apply sealer to clean, dry wood
- Choose a product rated for exterior wood use
- Reapply every 2–4 years depending on climate and exposure
As wood ages, it naturally changes color and develops a more rustic appearance. Sealing helps slow this process while maintaining a fresh look.
Additional Tips for Ongoing Pergola Care
How to Choose the Right Sealer
The best sealer depends on your climate, wood type, and the finish you want to maintain.
When selecting a product:
- Ask your pergola manufacturer or supplier for recommendations
- Look for UV protection and moisture resistance
- Avoid heavy film-forming finishes that can peel over time
Proper sealing helps prevent cracking, warping, and premature surface damage, while making long-term maintenance easier.
Painting a Pergola the Right Way
Acrylic exterior paint is a durable, weather-resistant option if you prefer a painted finish.
Best practices include:
- Painting during dry, low-humidity conditions
- Allowing each coat to fully dry before applying the next
- Avoiding painting immediately after rain or washing
Applying paint too soon in damp conditions can trap moisture, leading to cracking or peeling over time.
Removing Dirt and Old Paint
Begin restoration by clearing loose debris and flaking finishes.
- Use a stiff brush to remove dry buildup
- Avoid aggressive scrubbing that damages the wood grain
- Lightly sand to smooth splinters and uneven areas
Work slowly to prevent deep scratches that affect the wood’s appearance.
Treating Mildew and Stains
Mildew should be addressed as soon as it appears to prevent long-term damage.
- Use a mild bleach-and-water solution
- Scrub gently and rinse thoroughly
- Replace corroded fasteners that may stain the wood
After cleaning, clear debris from joints and grooves where moisture collects.
Washing Before Refinishing
Before applying paint or sealer, rinse the pergola thoroughly with water.
- Allow the structure to dry completely
- Never apply finishes to damp wood
- Inspect beams, joints, and fasteners as it dries
Proper drying ensures better adhesion and longer-lasting results.
Finishing After Restoration
Protect restored pergolas with layered finishes.
Recommended approach:
- Apply one or two coats of exterior acrylic paint (if painting)
- Finish with a compatible water sealer
- Follow manufacturer drying times closely
This helps protect against moisture, insects, and UV exposure while restoring visual appeal.
