Factory Priming -- The Best Way to Protect Your Exterior Wood Shutters

Published: September 17, 2020

By the Estate Millwork Design Team | Craftsmen since 1997

Preparation

Exterior wood shutters take a beating from the elements, that's why we take special care with our factory finishes to make sure that your shutters will have a long life of trouble free use. After each custom shutter is completed, it is machine sanded, and then hand sanded to prepare the surface for the final finish. After inspection and hand sanding, the shutters are blown off with high pressure compressed air and moved to our environmentally controlled paint rooms.

Priming

Most exterior wood shutters are made from cedar, and depending upon the species that is being used, cedars have a high level of tannic acid that is ideal for preventing fungus, mould and insect activity, but can be create difficulties in painted finishes. As such, we use a specially formulated oil based primer that has stain blocking features. The primer is designed to be absorbed into the wood grain and to give an excellent surface for the finish coats of paint.

Scuffing

After the shutter has been primed, the primer's action will slightly raise the grain of the wood as it is absorbed into the dry wood fibers. The next step in our process is to lightly scuff sand all surfaces of the shutter to remove the raised grain, and to provide a flat smooth surface for the optimal adhesion of the top coat. After the scuffing, the shutters are again cleaned with high pressure air before moving into the painting process.

Note: For customers who are ordering shutters factory primed, but who plan on applying the top coat on-site, Estate Millwork does not scuff sand the shutters prior to shipping. This allows the shutter to remain sealed for transit, and protects the wood from absorbing moisture which will cause problems later in the life of the shutter. It is a simple matter for the customer to quickly scuff the primer prior to painting. Each primed shutter will be carefully wrapped prior to shipment.

Frequently Asked Questions

What is the best wood for exterior shutters?

Spanish Cedar, Cypress, and Western Red Cedar are top choices for exterior shutters due to their natural resistance to moisture, rot, and insects. Mahogany and Teak are premium alternatives offering exceptional durability and rich coloring. The best choice depends on your climate, budget, and desired aesthetic.

How long do custom wood shutters last?

With proper finishing and maintenance, custom wood shutters can last 20 years or more. Hardwood shutters built with mortise and tenon joinery are structurally superior to composite or vinyl alternatives, and they can be refinished multiple times to extend their lifespan even further.

Can wood shutters be used in humid climates?

Yes. Species like Spanish Cedar and Cypress have natural oils that resist moisture absorption and fungal growth. Proper sealing with a marine-grade exterior finish provides additional protection. Estate Millwork kiln-dries all lumber to optimal moisture content before milling to minimize warping.

What is the difference between louvered and raised panel shutters?

Louvered shutters feature angled slats that allow airflow and light control, making them ideal for ventilation. Raised panel shutters have a solid panel with a beveled center, offering a more traditional, formal appearance. Both styles are available in custom sizes and multiple wood species.

Expert Tips for Choosing and Maintaining Wood Shutters

Always measure the exact window opening before ordering. Custom shutters are built to your specifications, and accurate measurements ensure a perfect fit without costly adjustments.
Consider your home's architectural style when selecting a shutter design. Louvered shutters complement Colonial and Coastal homes, while raised panel shutters pair well with Federal and Georgian architecture.
Apply a high-quality exterior primer and paint or UV-resistant clear coat within two weeks of installation for unfinished shutters. This seals the wood against moisture and UV damage from day one.
Inspect your shutters annually for signs of finish wear, especially on south-facing and west-facing elevations that receive the most sun exposure. Touch up any bare spots promptly to prevent moisture intrusion.