Wood Shake Roof Repair in Campbell, CA

Can an older shake roof still be repaired?

Often, yes. The test is how the wood behaves in hand, not how gray it looks. Cedar weathers to silver within a couple of years and can stay sound for decades after that. What we check is whether shakes flex and hold a nail, or crumble and split when lifted.

• Good candidate: shakes are thick at the butts, keyways are open, and leaks trace to a few split pieces or a flashing.
• Borderline: shakes have thinned so much that nail heads show, there is cupping on the sunny slopes, and moss is lifting the butts on the shady side. Repairs work, but plan the next roof.
• Past repair: wood breaks apart when touched, daylight shows through from the attic, or soft spots run across several areas of the deck.

Many wood roofs here were installed over spaced sheathing, boards with gaps between them. That is normal for shake, and it is one reason a later switch to shingles or tile involves new solid decking.

What a shake repair visit covers

• Replacing split, cupped, eroded or missing shakes and ridge pieces.
• Hand-clearing moss, needles and leaves from keyways and valleys.
• Renewing torn felt interlay at the leak area.
• Replacing rusted valley, chimney and wall flashing.
• Photos of each slope and a written estimate with a frank remaining-life call.

How we replace split shakes

1. Split out the damaged shake with a chisel or hammer, working in narrow pieces so the courses above stay undisturbed.
2. Cut the hidden nails with a shingle ripper slid up under the course above.
3. Trim a new cedar shake to width, leaving a small expansion gap on each side, since wood swells in wet weather.
4. Offset the joints so the new gap does not line up with the gaps in the courses directly above or below.
5. Fasten and lap correctly. Where face-nailing would be exposed, we use a hidden fastening method or a metal tab beneath the joint.

New cedar starts out tan or reddish and turns gray over one or two dry seasons, so a fresh repair stands out for a while before it blends in.

Shake roof repair in Campbell, CA: sun side versus shade side

Wood roofs in the South Bay age in two directions at once. South- and west-facing slopes dry out in our long rainless summers; the wood shrinks, splits along the grain and erodes until the shakes are paper-thin at the exposed ends. North slopes and anything under oaks or redwoods stay damp from November into spring, which invites moss, lichen and rot.

A cedar roof repair visit therefore looks at each slope separately. The sunny side usually needs split shakes replaced and gaps closed. The shady side needs debris cleared from keyways and valleys and soft wood found before it spreads into the sheathing.

Moss on shake roofs and what it does

Moss on a cedar roof is more than a looks problem. It holds water against the wood, grows into the gaps between shakes, lifts the butts and redirects water sideways under the next course. Fir needles and oak leaves caught behind it make the dam bigger.

We remove it by hand with brushes and scrapers working downslope, never with a pressure washer. High-pressure water tears the soft surface fibers off cedar, opens the grain and drives water under the courses. After cleaning, trimming back overhanging limbs does more for shake roof maintenance than any treatment, because sun and airflow are what keep moss from returning.

Are wood shake roofs allowed in fire hazard zones?

In mapped Fire Hazard Severity Zones, California's wildland-urban interface rules (Building Code Chapter 7A, part of Title 24 Part 7) call for Class A roof assemblies and ember-resistant vents. CAL FIRE publishes the zone maps, and much of the foothill land above Los Gatos, Saratoga and Monte Sereno and the Santa Cruz Mountains falls inside them.

Untreated wood shakes do not meet Class A on their own. Some South Bay cities have also adopted their own limits on wood roofing. Whether a repair to an existing wood roof triggers any of these rules depends on the scope of work and the jurisdiction, so check with your city building department or, for unincorporated land, the County's planning and development office before planning major work. The state residential code also sets a 3:12 minimum slope for wood shakes, and whoever bids a shake job of $1,000 or more should show a current CSLB license.

Wood shingle roof repair is not quite the same job

Wood shingles and wood shakes are often confused. Shingles are sawn smooth on both faces, thinner and more uniform. Shakes are thicker and at least one face is split, giving a rougher, deeper shadow line. Sawn cedar shingles turn up on some older South Bay houses; they are easier to match and quicker to replace one at a time.

Shakes are usually laid with felt strips interwoven between courses, while sawn shingles often are not. That changes how we open and close a repair, and it matters when we are chasing a leak, because torn interlay is a common hidden cause on shake roofs.

Why cedar roof owners call Xylo Fix Roofers

We are a family-run local team that still repairs wood roofs piece by piece. Our free written estimates come with photos of each slope, we tell you plainly when the roof is past repairing, crews clean up shake debris daily, and a few split shakes is a job worth our visit.

What moves the price of a cedar shake repair?

Shake work is slower than shingle work, and our written estimate itemizes it so you can compare it with replacement. The variables:

• How many shakes: a few splits on one slope versus scattered pieces on every face.
• Moss and debris: hand-clearing keyways on shaded slopes comes before any repair.
• Interlay and sheathing: torn felt or soft spaced boards found under lifted shakes.
• Matching stock: cedar of the right thickness, length and grade so it lies flat with the old courses.
• Flashing: rusted original valley and chimney metal is usually replaced in the same visit.
• Pitch and access: steep foothill roofs and long driveways take more staging.

Weighing shake repairs against a new roof

Repairs cost less now; replacement costs less per year once a wood roof has reached the borderline stage. What tips the decision:

• How many shakes need replacing, and whether that number has grown every winter.
• Whether the sheathing is still sound or soft spots are spreading.
• Your fire zone and any rules your jurisdiction applies to wood roofs.
• What your insurer has said at renewal.
• Whether you plan to add solar, which works poorly on worn shake.

Old chimney and wall metal on shake roofs is often original and rusted, so roof flashing repair is commonly part of the same job. Squirrels and woodpeckers also like soft cedar; if you see fresh holes, see animal damage roof repair.