Deck Painting & staining across Plainville, Massachusetts.

The Massachusetts Historical Commission's 1980 town survey describes rolling upland with sandy to gravelly soil, two large lakes and several smaller ponds, and large areas of bog and marsh, mostly in the eastern part of town. So two yards in the same town can treat a deck very differently. A deck on high, well-drained ground in full sun dries within hours of a storm, while one beside a pond or over low, wet ground can stay damp for much of the day.

Those two decks wear in opposite ways. The sunny one fades and checks as UV breaks down the stain and the wood surface. The damp one tends toward mildew, algae, and soft spots where water sits between boards. The cleaner, the product and the recoat schedule should be chosen for the site.

Prep that lets stain soak in

Stain only lasts if it can penetrate clean, dry wood. The usual sequence is a deck cleaner suited to the problem (a mildewcide wash for green, gray or black growth; a stripper for failing old coatings), a gentle rinse, and a brightener to restore the wood's pH. High-pressure washing at close range can raise and furrow the grain, so it is used with care.

After washing, the deck needs dry weather before staining. A simple test is to sprinkle water on a board: if it soaks in within a few minutes, the wood is ready; if it beads, it needs more time or the old finish is still sealing it.

Wood species and finish choices

Transparent and semi-transparent stains wear by fading, which makes the next coat simpler. Solid stains and porch paints cover more but can peel on horizontal surfaces, which is why they are often kept to railings, skirting and vertical trim.

• Pressure-treated pine: let new lumber dry out before the first coat; semi-transparent or penetrating stains suit it best
• Cedar and redwood: oil-based or high-quality waterborne penetrating stain keeps the color and slows graying
• Ipe and other tropical hardwoods: dense enough that only thin hardwood oils absorb
• Composite decking: generally not stained; cleaning is the main maintenance, so check the maker's guidance
• Previously painted or solid-stained boards: stay with a film finish or strip completely, since a penetrating stain cannot reach the wood

Older porches and lead paint

Just over half of local housing units, about 53%, were built before 1980, and 13% date from 1939 or earlier. On houses that old, painted porch floors, steps and railings may have lead in the lower layers. Scraping or sanding them is regulated under the EPA RRP rule for paid work, with ground covers, wet methods and HEPA cleanup. Our lead-safe painting page explains the process.

Attached units, manufactured homes and timing

Townhouses and other single-family attached units are about 7% of local housing, and manufactured homes about 7%. A townhouse deck may fall under association rules on color or on who handles maintenance, so check the governing documents. Wood steps and small decks built onto manufactured homes need the same cleaning and staining routine when they are pressure-treated lumber.

Stain needs a few dry days, with temperatures within the label range day and night. Late spring through early fall is the practical window; our post on deck stain and New England winters explains what cold does to a fresh coat.