Home archive shelving: line the wood or replace the unit

What to take away

Wood, steel or flat file: the shelf decision

If the unit is bare wood, keep it and line it. Replacing a unit is a furniture purchase, and furniture sits in the priciest tier of archive supplies. The count of what goes on the shelf comes before any decision about the shelf itself.

Steel shelving and flat files belong to the furniture tier, and that tier is bought last. Boxes ordered before the collection is measured are the classic case of overspending, and they are the most expensive thing to get wrong.

Why bare wood is awkward to keep clean

Bare wood cannot be wiped down the way laminate can, so it accumulates dirt. The Canadian Conservation Institute's note on unfinished wood explains why. The surface is soft enough to be damaged by some cleaning methods, and older wood is softer than new.

Wood also absorbs water, which rules out wet cleaning. Water and solvents swell the fibers, raise the grain, and can pull surface dirt below the surface as a stain. That leaves few cleaning options, so keep the boxes off the bare surface.

It also moves with humidity under whatever stands on it, which is another reason to read the room before buying the shelf. A hygrometer from a hardware store reads the same air as one from a conservation catalogue, though the conservation-grade units hold calibration longer.

Lining a shelf in five steps

A liner is the household answer to bare wood: heavy acid-free board or polyester film between the wood and the boxes. The unit stays, and what touches the boxes is something you can replace. Five steps put one in place.

Spare board and film need a place of their own, and storing home archive supplies covers where board, tissue and foam go.

Where the shelf goes

Put the shelf in a stable room, because the room is the first factor to settle. The Missouri Secretary of State's storage and housing guidance lists the environmental conditions, the storage furniture, how the collection is prepared and the enclosures.

Its targets work at home. Keep storage below 70 degrees Fahrenheit, because cooler air slows the chemical reactions inside paper. Aim for relative humidity between 35 and 50 percent, because damp air speeds those same reactions. Keep the area out of direct light, since ultraviolet from sun and fluorescent tubes drives the damage faster.

That order is the argument. A collection in a stable room with ordinary boxes is better off than one in expensive boxes in a garage, and a new shelf does not change the room it stands in.

Upkeep for a lined shelf

Plan the upkeep before buying anything. Consumables run out, hygrometers drift and need replacing, boxes get crushed and folders get refiled. Budget a small annual spend rather than treating this as a one-time equipping exercise, and check supplies on the same schedule you use to inspect the collection.

A lined wood shelf keeps its upkeep in the liner, which can be swapped, while the bare wood under it stays untouched. Steel and flat files are priced as furniture, so the same rule applies: count first, then buy.

Common questions

Should I replace old wooden shelves?

Not as a first move. The household answer is to line the shelf rather than replace the unit, with heavy acid-free board or polyester film between the wood and the boxes. Older wood is softer still, which is a reason to keep boxes off it.

Can I wipe a wooden shelf clean?

Not with water. Bare wood absorbs water, which rules out wet cleaning, and water and solvents can swell the fibers and raise the grain. It cannot be wiped down the way laminate can, so a liner is the better answer.

Is steel shelving worth the price?

It belongs to the furniture tier, which starts at several hundred dollars and up. Buy it last, after you have counted what goes on it. A stable, dry room matters more than the unit.

Do I still need a hygrometer?

Yes. It is the most underrated purchase, and it reads the room the shelf sits in, which is where the damage starts.