Deck Painting & staining throughout Northbridge, MA.

Horizontal wood outdoors has the hardest job on the house. Snow sits on it for weeks, water freezes in the gaps between boards, and summer sun bakes the surface. A coating that would last for years on a wall may wear through on a deck in a couple of seasons, so the choice of product and the prep under it matter more here than anywhere else.

Detached single-family houses account for 56.4% of local housing units, and another 13.3% are single-family attached. Any of those houses may have a back deck, a side porch or entry stairs, and the wood could date from any decade the town has been building.

Two kinds of outdoor floors

Census counts include 1,204 units built in 2000 or later, but an open deck can be added to a house of any age. Pressure-treated lumber or cedar takes penetrating or solid stain and is kept up by cleaning and recoating.

A covered porch with a tongue-and-groove floor, turned posts and painted railings is a different surface. Where a porch floor already has paint on it, it is maintained with porch and floor enamel, and switching it to stain means stripping to bare wood.

Sun, shade and where your deck sits

The Whitinsville district lies in a valley with steep hills to the north and south and mill ponds to the east and west, and the Blackstone and Mumford Rivers both run through town. Hills, water and trees all change how much sun a given backyard gets. A deck on an open, south-facing slope gets full sun that fades pigment fast; one on the north side of a house or under a tree canopy stays damp after rain and grows mildew.

For a sunny deck, a stain with more pigment holds color longer. For a shaded one, cleaning off mildew, improving airflow by trimming branches, and choosing a penetrating stain rather than a heavy film reduce peeling. Our paint vs. stain comparison lays out the tradeoffs.

Prep and repairs before any coating

Porches on older houses add one more step. Census data count 4,007 local units built before 1980, and porch floors, railings and lattice on those houses may carry lead-based paint under newer coats. On a pre-1978 house, scraping more than 20 square feet of it outdoors brings paid work under the EPA's lead-safe rules; see our lead-safe painting page.

• Probe boards, stair stringers and posts for soft wood, especially near the house and where water pools
• Replace rotted boards and reset popped screws or nails
• Clean with a deck cleaner; use a brightener on weathered pressure-treated or cedar
• Sand fuzzy grain and feather any peeling edges
• Let the wood dry fully, then stain on a dry, mild day out of strong midday sun

When to book

Stain needs dry wood, mild temperatures and a clear forecast through the cure. In late fall, short days, cold nights and wet leaves narrow that window. Our post on deck stain and New England winters covers what a bare or worn deck goes through over a winter.