Preventive maintenance is the single most cost-effective preservation investment a historic homeowner can make. Most of the major deterioration problems that affect historic homes — structural rot, masonry failure, window deterioration — result from deferred maintenance that allowed small problems to become large ones. This checklist provides a framework for regular inspection and maintenance.
Disclaimer: This checklist is for general guidance only. Specific maintenance needs vary by building, material, and condition. Consult licensed professionals for any work beyond basic cleaning and inspection.
Twice-Yearly Inspection (Spring and Fall)
Roof and Drainage
- Inspect roof surface for missing, cracked, or curling shingles or tiles
- Check flashing at chimneys, dormers, valleys, and roof-wall intersections — these are the most common points of water entry
- Clear gutters and downspouts of debris; ensure downspouts direct water away from the foundation
- Check for signs of ice damming at eaves (in winter climates)
- Inspect attic for evidence of water infiltration or condensation
Masonry (Brick, Stone, Mortar)
- Inspect mortar joints for cracking, crumbling, or erosion — deteriorating mortar allows water entry and should be repointed with lime-based mortar matched to original
- Check for efflorescence (white salt deposits on masonry surface) — indicates water moving through masonry
- Inspect for spalling brick (surface breaking away) — often caused by hard modern mortar or freeze-thaw cycles
- Check chimney caps and crowns; inspect chimney mortar
Exterior Woodwork and Paint
- Inspect all painted wood surfaces for peeling, cracking, or bare areas — address promptly to prevent moisture entry
- Check porch columns, balusters, and railings for rot at bases and joints (where water collects)
- Inspect window sills and sill nosings — these are primary rot locations on wood windows
- Check caulking at window and door frames; recaulk as needed with paintable caulk
- Inspect exterior trim at eaves, rakes, and cornices
Foundation and Grading
- Walk the perimeter and check that grade slopes away from the foundation on all sides
- Inspect exposed foundation (if visible) for cracking, movement, or spalling
- Check basement or crawl space for water infiltration, staining, or efflorescence
- Ensure crawl space vents are clear and functioning (or sealed if the crawl space is conditioned)
Annual Tasks
Windows
- Re-glaze any windows with failing glazing compound (the putty that holds the glass in the sash) — failing glazing allows moisture to enter the wood sash
- Inspect and replace weatherstripping as needed
- Lubricate window hardware (sash lifts, locks, pulleys)
- Touch up or repaint window sash and sills as needed
Interior
- Inspect plaster ceilings and walls for new cracking — hairline cracks are generally stable; wider or growing cracks may indicate movement
- Check hardwood floors for gaps, cupping, or raised boards that may indicate moisture changes
- Inspect accessible plumbing for corrosion or leaks
- Test smoke and CO detectors; inspect the electrical panel for any tripping breakers or visible issues
Vegetation Management
- Trim trees and shrubs away from the building — vegetation in contact with exterior surfaces traps moisture and accelerates deterioration
- Remove any vines growing on exterior walls — they trap moisture and can damage mortar joints
- Keep firewood and soil away from wood siding and porch bases
Five-Year and Long-Term Planning
Some maintenance items require periodic attention on a longer cycle:
- Full exterior paint cycle: most historic homes with wood exteriors need a full repaint every 7–12 years depending on exposure and paint quality
- Roof replacement: varies by material; have the roof professionally assessed as it approaches the typical replacement age for its material type
- Repointing assessment: have masonry joints professionally assessed every 10–15 years
- Chimney inspection: have working fireplaces inspected by a certified chimney sweep every 1–3 years
For more on caring for your historic home, see our Renovation Basics guide and the Resources page for preservation organizations that offer technical assistance.