Guide · 7 min read · Updated August 14, 2026
Cedar clapboard and shingle: how to look after New England siding
Cedar is the signature siding of this region and it is also the least forgiving. Almost every “the paint failed after two years” story in MetroWest involves cedar and a shortcut.
Tannin bleed — the mistake that shows up in month three
Western red cedar contains water-soluble extractives. Coat bare cedar with a standard latex primer and those extractives migrate through the film, producing brown or amber staining that is most obvious under white and pale colors. It typically appears weeks after the job is finished, which is exactly when the contractor has been paid and moved on.
The fix is not complicated, it just costs a little more: a stain-blocking primer on every bare cedar surface. Ask any bidder specifically what primer they intend to use on bare cedar. If the answer is not a stain-blocking product, you have your answer about the rest of the quote.
How cedar actually fails here
- Cupping. Shingles curl as they take on and lose moisture through the seasons. Cupped shingles hold water at the butt edge and paint fails there first.
- Splitting. Usually around fasteners driven too tight, or from nailing through the wrong part of the shingle.
- Butt-edge rot. End grain drinks water. Any coating system needs to reach the underside of the butt edge to protect it.
- Mildew on north elevations. Shade plus New England humidity. It is cosmetic until it grows into the film.
- Nail staining. Old steel nails corroding and bleeding rust through the finish. Cedar should be fastened with stainless or hot-dipped galvanised.
Paint or stain? The decision that dictates the next twenty years
| Characteristic | Paint | Solid stain | Semi-transparent stain |
|---|---|---|---|
| Look | Opaque, smooth, sharpest color | Opaque, texture shows | Color with grain visible |
| Interval | 6 – 9 years | 5 – 8 years | 3 – 5 years |
| How it fails | Peels — needs scraping | Erodes — usually wash and recoat | Fades — wash and recoat |
| Next job cost | Highest | Moderate | Lowest |
| Reversible? | Effectively no | Hard | Yes, can go opaque later |
The one-way door
You can move from stain to paint. You cannot practically move back from paint to stain without stripping every shingle, which is rarely economic. If your house is currently stained and you like the texture of the cedar, think carefully before someone talks you into paint.
What good cedar preparation looks like
- Soft wash, not pressure wash. High pressure erodes the soft spring growth between the grain lines and drives water behind the courses. Once water is behind cedar it takes weeks to leave.
- Let it dry properly. A moisture meter reading above 15% means the wall is not ready, regardless of what the calendar says.
- Replace failed shingles first. Back-prime the new ones on all faces and edges before they go on the wall.
- Stain-block every bare area. See above.
- Back-brush anything sprayed. Spraying alone lays the coating on the surface; back-brushing works it into the grain and the shadow line under each butt edge.
- Do not caulk the horizontal laps. Cedar needs to drain and breathe. Caulking the laps traps water inside the wall — a common and expensive mistake.
Leaving it natural
Untreated cedar weathers to silver-grey and, on a well-detailed wall with good drainage, will last for decades. It is a legitimate choice, particularly on the Cape and on shingle-style houses. What it needs is periodic washing and honest inspection of the butt edges, not a coating. If someone tells you natural cedar must be sealed, ask why.