Preservation consultant urges linseed oil paints and limewash to protect New Bern’s historic fabric

A visiting preservation consultant delivered a detailed presentation to the New Bern Historic Preservation Commission describing why modern non‑breathable coatings (notably recent low‑VOC latex formulations) can trap moisture, damage historic wood and masonry, and accelerate deterioration. The presenter argued linseed oil paints — and limewash for masonry — are more compatible, allow substrate breathing, and can substantially extend the life of historic fabric if applied correctly and with appropriate substrate preparation.

The consultant presented photographic examples from other towns and projects, described techniques for removing non‑breathable coatings (including infrared heating and, in specialized cases, laser removal) and recommended mechanical scraping and light sanding rather than aggressive media blasting for historic wood. He discussed practical mitigation measures (boric acid or copper naphthenate treatments for mildew and rot prevention), recommended breathable insulation approaches (rock wool/comfort bat where appropriate), and emphasized the need for contractor training and consumer education so property owners do not default to low‑cost latex solutions.

Commissioners asked about availability, cost and drying times for linseed oil paint; the presenter acknowledged linseed is more expensive per can but argued coverage and longevity can make it cost‑effective by square foot and suggested ways contractors could manage longer drying cycles (e.g., phased work, premium services). He offered to return for contractor‑focused sessions and provided slides and contact cards for follow‑up. Commissioners thanked the presenter and discussed how the HPC might incorporate paint guidance into updated design guidelines and outreach to local contractors.