How to Stain Cedar Shakes: Products, Spraying and Upkeep

Cedar shakes look stunning when new, but left bare they turn silver-gray within a year or two, and eventually go dark and blotchy with mildew. Knowing how to stain cedar shakes properly protects the wood from UV and moisture and keeps that warm, textured look. The key difference from staining smooth siding is texture: shakes have deep grooves, uneven butt edges and overlapping courses, so technique matters as much as the product.

Here is the short version. Clean and brighten the wood so the stain can soak in, let it dry to a low moisture content, choose a penetrating semi-transparent or semi-solid stain, spray it on with a pump sprayer or airless sprayer, and back-brush immediately so it works into the texture and the bottom edge of every shake. Expect to restain every three to five years for semi-transparent finishes and every five to eight years for solid stains, depending on sun exposure.

The sections below cover restoring weathered shakes, choosing a stain, the spraying method that works on rough surfaces, and a realistic maintenance schedule.

How to Stain Cedar Shakes: Planning the Job

Start by checking the weather. You need at least two or three dry days in a row: one to let cleaned shakes dry, and one for application and curing. Ideal conditions are 50 to 90°F, low wind and no direct midday sun on the wall you are working. Stain that dries too fast in hot sun leaves lap marks, and wind drifts spray onto windows, cars and neighbors.

Next, inspect the siding. Replace split or rotted shakes, reset popped nails with stainless or hot-dipped galvanized fasteners, and repair flashing around windows and doors. Stain will not save wood that is already decaying. Trim back shrubs at least a foot from the wall so you can reach the lower courses and spray without overspray on plants.

Tools and Materials

• Wood cleaner or oxygen-bleach-based deck and siding cleaner
• Wood brightener (oxalic acid based) to restore color after cleaning
• Garden hose with a spray nozzle, or a pressure washer used gently at low pressure with a wide fan tip
• A pump sprayer for small areas, or an airless sprayer for a whole house
• Stain brushes, 4 to 5 inches wide, for back-brushing
• Drop cloths, painter’s plastic and tape for windows, trim and plants
• A moisture meter for wood
• Chemical-resistant gloves, goggles and a respirator rated for the products you use
• Extension ladder, ladder standoff or scaffolding

Restoring Gray, Weathered Shakes

Restaining cedar shakes that have gone gray takes more prep than staining new wood. The gray layer is UV-damaged wood fibers, and stain applied over it will fail early. Removing that layer brings back the natural color and gives the new finish something solid to grip.

1. Wet the plants and the wall. Soak nearby landscaping with plain water and cover it with breathable drop cloths.
2. Apply cleaner. Spray the cleaner from the bottom up to prevent streaks, and keep it wet for the dwell time on the label, usually 10 to 15 minutes. Do not let it dry on the wood.
3. Agitate and rinse. Scrub stubborn mildew with a soft brush, then rinse from the top down. If you use a pressure washer, keep pressure low, hold the tip 12 inches or more away and spray down the shakes, never upward under the courses. Too much pressure raises fuzz and forces water behind the siding.
4. Brighten. Apply the brightener, let it work, and rinse. Brightener neutralizes cleaner and restores the warm cedar tone.
5. Dry thoroughly. Wait 48 hours or more. The shakes should read about 15 percent moisture or less on a moisture meter before staining.

If the shakes already have an old solid stain or paint that is peeling, you will need to strip it or scrape loose material first. Penetrating stains will not soak through an existing film.

Choosing a Cedar Shake Stain

Cedar is naturally rot resistant but soaks up finish unevenly, so the best cedar shake stain is typically a penetrating oil-based or hybrid water-oil formula labeled for vertical siding and shakes.

• Transparent or toner stains show the most grain but offer the least UV protection. Plan to recoat every one to three years.
• Semi-transparent stains are the most common choice. They tint the wood, let grain show, and last roughly three to five years.
• Semi-solid stains hide more color variation and are useful on mixed old and new shakes.
• Solid stains behave more like paint, hiding grain and lasting longer, but they form a film that can peel and must be scraped when it fails.

Look for a product with mildewcide and UV blockers, and match the base to your climate: in damp, shaded areas mildew resistance matters most, while in desert sun UV protection is the priority. Always test on a few shakes in an inconspicuous spot and let it dry to see the true color.

Spray Technique for Textured Shakes

Spraying is the fastest way to cover the grooves and the undersides of shakes, but spraying alone leaves thin spots and drips. Back-brushing is what makes the finish last.

1. Mask carefully. Cover windows, doors, light fixtures, trim you do not want stained, and the foundation.
2. Work in small sections. Choose an area about three or four courses high and several feet wide, and start at a corner or natural break so you never stop in the middle of a wall.
3. Spray the butt edges first. Angle the tip upward slightly to hit the bottom edge of each shake, which is the thickest end grain and the first place water attacks.
4. Spray the faces. Hold the tip about 12 inches away and spray with the grain in overlapping passes.
5. Back-brush right away. While the stain is wet, brush it into the grooves and out to the edges, catching drips before they dry.
6. Keep a wet edge. Overlap into the still-wet stain of the previous section to avoid lap marks.
7. Apply a second coat if the label calls for it. Many penetrating stains specify wet-on-wet application, meaning the second coat goes on before the first dries.

A pump sprayer is perfect for a garage, a dormer or a small cottage. For a full house, an airless sprayer with a small tip saves hours, though it produces more overspray, so masking and wind conditions matter more.

How Often to Restain Cedar Shakes

Sun exposure drives the schedule more than anything else. South and west walls weather fastest, while north walls under trees may go longer but grow mildew. Inspect each spring. When water no longer beads on the surface or the color looks washed out, it is time to clean and recoat. You can usually recoat a semi-transparent finish with a light cleaning rather than a full restoration, as long as you do not let it go fully gray again.

Troubleshooting Common Problems

• Blotchy color. Uneven prep or wet wood. Clean and brighten evenly and make sure the shakes are dry.
• Sticky surface days later. Too much stain that did not penetrate. Wipe off excess with a rag while fresh and follow coverage rates.
• Peeling. A film-forming product over damp wood or over an old finish. Strip, dry and switch to a penetrating stain.
• Black spots returning. Mildew. Clean with oxygen-based cleaner and choose a stain with mildewcide.

Safety: Ladders, Old Coatings and Chemicals

Shake siding work puts you on a ladder for hours. Set extension ladders on firm, level ground at about a 1-to-4 angle, use a standoff to keep the ladder off the shakes, and keep three points of contact. Never overreach; move the ladder instead. For two stories and above, rent scaffolding or hire a pro.

On homes built before 1978, test any old paint or solid stain for lead before scraping or sanding, and use lead-safe work practices. Some older homes also have asbestos in siding, underlayment or caulk, so test suspect materials before disturbing them.

Cleaners, brighteners and stains are chemicals. Wear gloves, goggles and a respirator per the label, especially when spraying. Never mix cleaners, such as a bleach product with an acid-based brightener. Keep oil-based stain vapors away from pilot lights and open flames. Oily rags can spontaneously combust, so lay them flat outdoors to dry or store them in a sealed metal can filled with water.

Cost and When to Call a Pro

A DIY job usually costs a few hundred dollars in cleaner, brightener and stain for an average house, plus sprayer rental if needed. Professional cleaning and staining of cedar shake siding typically runs from a few thousand dollars upward, depending on size, height and prep. Hire a pro for tall walls, heavy mildew, peeling solid stain, or when you would rather not learn how to stain cedar shakes on a ladder. A pro crew with scaffolding can often finish in a day or two.