Exterior Painting across Berlin, Massachusetts.

An exterior paint job lasts only as long as the prep under it. Paint fails at the places where water gets in: the bottom edges of clapboards, window sills, the end grain of corner boards, and joints where caulk has split. The work that decides how long the finish holds happens before the first coat, in scraping, sanding, repairing wood and priming bare spots.

In this town the starting point varies a lot from one street to the next. Census data show about 22% of homes date from 1939 or earlier and about 42% from 2000 or later, so one house may carry a century or more of paint layers while another is on its first or second coat.

Older house forms, Colonial through Italianate

The Massachusetts Historical Commission's reconnaissance report traces the local house forms by period: the two-story, five-bay center-chimney house in the Colonial era; the double-chimney form, which the report calls prevalent in the Federal period, with few brick dwellings; then gable-end, side-passage houses with Greek Revival and Italianate details from 1830 to 1870. Where a house of these periods is wood-framed and clapboarded, as the 1870 Town Hall is, the exterior means clapboards, corner boards, cornices and window casings that have likely been repainted many times.

On houses like these the goal is to remove loose paint without damaging old wood. That means hand scraping and sanding, filling or replacing split clapboards, consolidating soft sills, and priming bare wood the same day it is exposed. Gable-front houses also put a large, tall wall facing the street, so staging and ladder setup is a bigger part of the job than on a ranch.

Historic status: what applies and what does not

The 1870 Town Hall on Woodward Avenue is individually listed on the National Register of Historic Places. Its nomination describes a wood-clapboard, gable-front building and points to a cluster of historic buildings around Meeting House Common, including the 1826 First Parish Meetinghouse and the Bullard House, that could form a National Register district. That district is described as potential, not designated.

National Register listing on its own does not control the paint colors a private owner chooses. We found no record of a local historic district under Chapter 40C in town. Before any demolition or major alteration, it is still worth calling the town to ask what review applies; ordinary repainting is a different matter.

Scraping old paint safely

Just under 43% of local housing units were built before 1980, and lead paint was banned for homes in 1978. On those houses the lower layers of siding and trim paint may contain lead. EPA's Renovation, Repair and Painting rule applies when paid work disturbs more than 20 square feet of exterior painted surface on a pre-1978 home: ground sheeting, no power sanding without HEPA shrouds, no open-flame burning, and careful cleanup of chips from soil and planting beds. The lead-safe painting page covers the steps.

Season and timing

Exterior paint needs dry wood and air and surface temperatures above the minimum printed on the can, during application and for the curing hours after. In central Massachusetts, late spring through early fall gives the most reliable window, with cool nights and morning dew shortening the working day at either end. Our post on painting a house exterior in November explains the late-season limits, and how long exterior paint lasts here covers repaint intervals.

• Sun-facing walls dry first in the morning; shaded walls may stay damp until midday
• Fresh paint should not take rain or heavy dew until it has set, per the label
• Bare wood left unprimed for weeks starts to weather and loses adhesion