Maintenance
Part of Twenty period interior ideas for an old house, sorted by how much change they require
Caring for a restored period interior once the first year passes
A seasonal upkeep routine for restored period interiors: woodwork, plaster, floors, stone and hardware, with the cleaning mistakes that undo good work.
What to take away
- Gentle and frequent beats aggressive and occasional. Almost all interior damage in year two comes from cleaning products.
- Test any cleaning method in an inconspicuous spot first, and write down what you used.
- Humidity control protects woodwork, plaster and floors better than any surface treatment.
- Keep a repair log with photographs, product names and dates. Your future self will need it.
Restored interiors do not stay restored on their own, but they need less than people assume. The plan below is short because a short plan actually gets followed.
Monthly, and it takes an hour
Monthly One-Hour Walkthrough
- Dust top down, dry cloth only
- Photograph new plaster cracks with date
- Test doors latch and windows operate
- Check under sinks and behind toilets for damp
- Dust top to bottom with a soft brush and a dry cloth.
- Look for new cracks in plaster, paint and joints, and photograph anything you find.
- Open and close every window, door and shutter, and work the latches.
- Check for damp behind furniture on external walls, around flues and under sinks.
- Add anything loose to the repair log, with a date.
Seasonal work
| Season | Tasks |
|---|---|
| Spring | Wash windows, check sash cords, air the house, inspect for winter condensation damage |
| Summer | Wax or refresh protective coatings on woodwork, service the fireplace before autumn |
| Autumn | Seal drafts at floors and doors, check humidification plans, clear attic vents |
| Winter | Watch condensation on glass and cold walls, keep humidity moderate rather than high |
Humidity is the quiet variable. Very dry winter air opens joints in furniture, paneling and floors; very damp air feeds mold behind furniture on cold external walls. A digital hygrometer, typically $15 to $40, is the measuring tool; keep it away from windows and doors.
Preservation guidance commonly cites 40 to 50 percent relative humidity for interiors with original wood, plaster and finishes. Your target depends on your finishes and your climate. Move settings in small steps and avoid swings of more than about 10 points in a week.
Seasonal Upkeep Calendar
- SpringWash windows, check sash cords, air house
- SummerWax woodwork, service fireplace before autumn
- AutumnSeal drafts, check humidification, clear attic vents
- WinterWatch condensation, keep humidity moderate
Woodwork, and the mistake most people make
Modern all-purpose cleaners and silicone polishes damage historic woodwork more than dirt does. Silicone contaminates surfaces so thoroughly that future refinishing fails, and strong alkaline cleaners lift old finishes.
For routine work, use a soft brush or a dry microfiber cloth. A few drops of mild dish liquid in a quart of water, wrung nearly dry, is enough for a varnish or shellac surface. Never soak the wood.
Wax suits shellac and varnish, and once a year is plenty. Butcher's Wax and Liberon Wax Polish Black Bison are paste waxes for varnished and French polished wood. An oiled surface takes tung oil or boiled linseed oil instead.
The U.S. General Services Administration publishes its Technical Procedure for cleaning and refinishing historic woodwork, which begins with identifying the existing finish. Read it once and you will throw away half of what is under your sink.
Stone, tile and hearths
Marble mantels, thresholds and hearths are softer and more absorbent than they look. Acidic cleaners etch them permanently, and abrasive pads dull the polish. The GSA's companion Technical Procedure for cleaning and repolishing interior historic marble explains the sequence and why aggressive shortcuts cannot be reversed. StoneTech Revitalizer, a pH neutral stone cleaner, suits marble, travertine and limestone.
Hardware, glass and small moving parts
The parts touched every day fail first, and they are almost always repairable. A loose door knob usually needs a set screw and a spindle, not a new lockset. A sticking mortise lock needs cleaning and a light oil, not replacement.
Sash cords part at the knot and can rerun in an afternoon once the pocket is open. Window putty fails at the bottom rail first, where water sits.
Reglazing that edge every few years keeps the sash sound for decades. That is the window argument in miniature, since most sash that looks finished is really a maintenance backlog.
Keep a shallow box of spares: matching screws, a length of sash cord, spare pulls, and a jar of the glazing compound you last used. House of Antique Hardware and Van Dyke's Restorers both sell matching screws and period pulls.
Repairs that take ten minutes get done. Repairs that need a trip to a store get postponed until they turn into carpentry.
Keep the record
Log every product, color, supplier and repair with a date and a photograph. When a section of trim needs matching in six years, the log is worth more than memory.
The wider set of interior options is in our twenty period interior ideas, and the failures that upkeep is meant to prevent are cataloged in recurring problems and their fixes.
