How Should Paintings Be Stored Safely?

Store paintings in a clean, secure, monitored space away from water, floors, exterior walls, heat, direct light, pests, and traffic. Stable framed or stretched paintings are usually kept upright on padded racks with separators and support from the frame, not the canvas. Unframed, oversized, rolled, panel, glass, and unstable works need object-specific mounts, crates, or conservation advice.

Key takeaways

• Examine, identify, and photograph a painting before storage.
• Never let another object, packing material, or finger press against a painted canvas.
• Avoid floor-level storage and water pipes even for short periods.
• Use breathable dust protection only when the paint is stable and the cover cannot abrade the surface.
• Storage must allow safe retrieval and inspection; dense stacking creates handling damage and lost records.

Assess the painting before choosing storage

“Painting” describes an image-bearing layer applied to a support, but the support may be canvas, wood, metal, board, paper, plaster, glass, plastic, or a composite. It may be framed, glazed, unframed, stretched, rolled, double-sided, shaped, or part of an installation. The Canadian Conservation Institute's guide to caring for paintings explains how support and paint system influence handling and storage.

Record the identifier, dimensions, components, present location, and visible condition. Look without touching for lifting or flaking paint, tears, punctures, slack canvas, distorted panels, loose keys, failed joins, broken glazing, detached labels, pests, mold, or tacky surfaces. A work with active instability should not be wrapped or moved into crowded storage until a conservator has assessed it.

Choose the storage space by risk

Good storage is dry, clean, secure, ventilated, monitored, and protected from fire and water. Avoid attics, garages, unconditioned sheds, damp basements, boiler rooms, kitchens, bathrooms, laundry areas, and spaces beneath roof drains or plumbing. Keep racks and crates raised from the floor and separated from exterior walls enough to inspect for moisture and pests.

Darkness reduces light exposure, but darkness alone is not preservation. A closet containing cleaning chemicals, insects, a hot-water pipe, and unrecorded stacks can be more dangerous than a well-managed visible rack. The CCI Storage and Display Guidelines for Paintings link environment, storage furniture, framing, and handling.

Provide stable climate appropriate to the material and its history, and monitor trends. NGCA's climate article explains why temperature and relative humidity for art cannot be reduced to one universal number.

Upright racks for framed and stretched paintings

Stable framed paintings are commonly stored vertically on fixed or sliding screens, in slotted bins, or on padded shelving. Screens use appropriate hanging hardware and must be engineered for load and movement. Slotted bins need smooth dividers and padded bases so frames do not contact one another.

Support each work by its frame or a protective travel frame. Do not rest stretched canvas directly on a narrow hard edge, lean works at unstable angles, or allow screw eyes and hanging wire from one work to touch another. Face surfaces in the same direction when stored in a row so projecting frame backs do not press into paint.

When temporary floor placement is unavoidable during a controlled task, use padded blocks, maintain a secure angle, and keep the work attended. This is staging, not storage.

Unframed stretched canvas

An unframed canvas has exposed tacking edges, corners, paint edges, and reverse. A rigid handling or travel frame can create a safer perimeter. Do not carry it by the canvas, stretcher keys, or crossbars if they are unstable. A backing board may protect the reverse when correctly fitted and ventilated for the work.

Rigid panels and boards

Panels can warp, split, delaminate, or break under point loads. Store them fully supported and prevented from sliding. Heavy stone, glass, or metal supports may require engineered racks and mechanical assistance.

Rolled paintings

Rolling is not a routine solution for finished paintings. Paint and ground can crack, crease, block, or delaminate, especially when old, thick, brittle, textured, tacky, or rolled tightly. If an artist intentionally supplies a flexible unmounted work for rolling, document the permitted orientation, minimum core diameter, interleaving, and acclimatization. Otherwise seek conservator advice.

Covers, separators, and enclosures

Use clean, smooth, conservation-appropriate materials that do not transfer dyes, plasticizers, acids, fibers, or adhesives. Dust covers should not contact fragile paint or gilding. Loose polyethylene sheeting can accumulate condensation or static and may be unsafe around damp or friable works. Bubble film can imprint or adhere to surfaces and should not touch paint directly.

Rigid backing boards, glazing, frames, trays, slipcases, and crates can protect when designed for the object. An enclosure should remain identifiable from the outside so staff do not unwrap works merely to find them. Keep labels and barcodes off original surfaces unless a conservator-approved marking method is used.

Do not seal a wet, moldy, tacky, off-gassing, or recently treated work into an enclosure without professional guidance.

Organize for retrieval

Assign every bay, screen, shelf, or slot a unique location code. Update the catalog at the time of movement. Store by size and handling requirements rather than value or alphabetical title alone. Heavy works should not need to pass over fragile works. Frequently requested objects should be reachable without moving an entire row.

Maintain aisles wide enough for the largest planned move and equipment. Post load limits. Secure sliding screens. Keep crates, ladders, and packing supplies from becoming unrecorded obstacles. NGCA's guide to safe art handling describes the route and team planning that storage retrieval requires.

Inspect storage as a system

Schedule inspections for leaks, pests, dust, corrosion, mold odors, blocked vents, enclosure failure, unstable frames, loose components, and location mismatches. Compare object condition with dated photographs. Record “no change observed” as a dated inspection, not as an assumption.

An integrated pest-management program uses housekeeping, exclusion, traps, identification, and trend review. Avoid spraying pesticides in storage around artworks. If mold is suspected, isolate access, protect people, avoid fans that spread spores, and contact qualified professionals.

Common mistakes

• Wrapping a painting before checking whether the surface is stable or tacky.
• Leaning several works together without dividers or retrieval order.
• Carrying a frame by wire or inserting fingers behind the canvas.
• Storing art directly on concrete floors or under pipes.
• Treating climate-control equipment as a substitute for leak prevention.
• Losing the relationship among painting, frame, loose components, crate, and record.
• Using a household blanket whose fibers, dyes, seams, or hardware contact the paint.
• Placing heavy works on racks without verified capacity or seismic restraint where relevant.

Related questions

Can paintings be stored flat?

Small, stable rigid works may be stored flat with full support when appropriate. Stretched canvases and framed paintings are usually stored vertically; flat stacking can load frames and surfaces. Object condition and construction control.

Should paintings be covered in plastic?

Not directly or automatically. Plastic can trap moisture, create static, and contact paint. A conservator or experienced preparator can specify barriers and ventilation for the situation.

Can oil paintings touch each other?

No painted surfaces should touch. Varnish and oil paint can remain pressure-sensitive or develop projecting texture; contact risks abrasion, adhesion, and transfer.

How high should art be kept above the floor?

There is no universal height, but it should be high enough to reduce routine cleaning, minor leak, and shallow-flood risk and to permit inspection. Local flood and building assessments may require substantially greater clearance.

Can a storage unit be used for fine art?

Only after evaluating climate, water, fire, security, pests, access, insurance terms, monitoring, and emergency response. A commercial “climate-controlled” label does not describe actual tolerances or continuity.

Storage preserves the possibility of access

Painting storage succeeds when the work remains stable, identifiable, reachable, and documented. Racks and covers matter, but so do the roof, floor, route, sensor, location record, and inspection schedule. A dark room full of inaccessible stacks is not preservation; it is deferred risk.

Related NGCA reading

• NGCA FAQ
• Art Conservation: Preserving Art for Posterity
• Essential Guidelines for Preserving Your Art Collection
• What Is Varnish in Painting?

Sources and further reading

1. Canadian Conservation Institute, “Storage and Display Guidelines for Paintings”
2. Canadian Conservation Institute, “Caring for Paintings”
3. Canadian Conservation Institute, “Basic Handling of Paintings”
4. U.S. National Park Service, Museum Handbook, Part I
5. U.S. National Park Service, Conserve O Grams
6. American Institute for Conservation, “Caring for Belongings”
7. Smithsonian Museum Conservation Institute, “Taking Care”
8. Canadian Conservation Institute, Agents of Deterioration