As cooler weather moves in across the United States, from damp Pacific Northwest winters to dry, heated interiors in the Midwest and Northeast, your home environment can shift in ways that stress artwork. Temperature swings, low winter sun, and humidity changes can trigger cracking, mold, fading and warping.
This guide is designed by our experts to protect your collection during fall and winter, whether it’s hanging in a living room, displayed near a fireplace, or stored in a basement or closet.
Your Seasonal Care Checklist
- Keep rooms stable: 68 to 72°F and 40 to 55% RH (relative humidity)
- Avoid exterior walls and uninsulated areas: for both display and storage
- Control light: winter sun is low and strong, so use shades and UV-filtering glass (you may be able to purchase UV filtering film for windows if glazing the artwork is not an option)
- Avoid direct heat: any heating units, baseboard heaters and fireplaces can cause rapid fluctuations that damage a variety of art materials, so choose a location that is not in direct contact or near these heat sources
- Inspect your artwork monthly: check for early warning signs such as mold, hairline cracks, lifting paint, warped paper
Paintings (Canvas, Panel and Modern Art)
Cold surfaces along exterior walls and near drafty windows can trap condensation behind frames, encouraging mold on canvases and wooden stretchers. If this is the case, rehang pieces at least a few inches from exterior walls and away from bathrooms, laundry rooms, or damp basements. You can add felt bumpers to frames to improve air circulation.
Bursts of hot air from forced-air vents, radiators, baseboards or fireplaces can make paint and wood expand/contract, leading to cracking, cupping, or flaking. Keep artwork 3+ feet from vents, radiators, and fireplaces to avoid damage. You can use vent deflectors and maintain steady set points rather than frequent thermostat swings.
Warning signs of damage may include new craquelure (fine cracks), raised paint edges, flaking, or a frame that has started warping or separating at the corners. A faint musty odor or a cloudy surface may signal trapped moisture. If it is safe, check behind the artwork as well as the front, as mold and damp can creep into the open canvas or panel from the wall.
Consider a small room humidifier in very dry climates to keep RH above 40% and a dehumidifier in damp spaces to hold it below 55%.
Works on Paper (Watercolors, Prints, Drawings, Photographs & Manuscripts)
Paper absorbs moisture quickly. High RH or condensation causes mold, foxing (brown spots), or cockling (waviness). We recommend that you display paper works in rooms with stable heating, avoid exterior walls and rooms that swing from hot to cold like garages and porches.
Paper artworks should be framed with acid-free mats/backing and UV-filtering glazing (acrylic or glass). Short days still bring low-angle, high-glare sun through south- and west-facing windows, which can fade inks and pigments. You can also use roller shades/curtains or reposition art out of direct sun. For valuable works, consider UV window film as an extra layer of protection.
For safe storage, keep paper flat (do not roll) and place it between acid-free paper in a portfolio or clean, secure box. Choose a dry, climate-controlled closet inside the living area, not an attic, garage, or basement. You can add silica gel (conditioned to 40 to 50% relative humidity) in storage boxes for extra protection against moisture damage.
Decorative Objects (Ceramics, Porcelain, Terracotta & Mixed Materials)
Daily heating cycles cause expansion/contraction, leading to fine glaze cracks and joins loosening. Keep objects away from radiators, baseboards, fireplaces, and supply vents.
Porous materials like unglazed terracotta and stone can absorb moisture, causing salt efflorescence (white crust) or surface weakening. To avoid this, try to maintain 40 to 55% humidity levels and avoid damp locations. If white salts appear, do not wipe them as this can cause further issues – contact our conservation team for help.
Support fragile items from the base with two hands. Cold materials can be more brittle; let objects acclimate to room temperature before moving. Dust with a soft, clean brush, do not use household cleaners on any art surfaces.
Artwork Monitoring Made Simple
- Place a digital thermo-hygrometer in each room (aim for 40 to 55% humidity, 68 t0 72°F)
- Consider smart sensors with alerts for leaks or humidity spikes (useful near windows and exterior walls)
- Log monthly readings; if you see repeated dips below 35% humidity or spikes above 60%, adjust HVAC or humidifier settings
Our Experts Answer Your Questions
We are always happy to advise on the best conditions for your artwork and decorative items. Our trained conservators have answered some of our most frequently asked questions.
What’s the best indoor climate for art in winter?
Aim for 68 to 72°F and 40–55% humidity levels. More important than a perfect number is stability, so avoid big daily swings.
Is it safe to hang art in a bathroom?
Generally, no. Bathrooms trap moisture and drive frequent humidity spikes that cause mold and warping. Paper is particularly damaged by humidity, as this can increase the risk of foxing (brown spots) and weakening of the fibres.
Can I hang art above a radiator or baseboard heater?
This is a risky location to display art. We recommend maintaining at least 3 feet of clearance and using heat deflection if you have no alternative.
Do I need UV protection in winter?
Yes. The low winter sun can be intense through south / west windows. Use UV-filtering glazing or window treatments.
When should I call a conservator for help?
We recommend speaking to our team via phone or email when you notice any of the following issues:
- New or worsening cracks, lifting paint or flaking
- Mold, foxing or a musty odor
- Warped frames
- Waves in paper
- Salt efflorescence on ceramics
- Any water related incidents (roof leak, flooding, burst pipe)
- Any fire related incidents (smoke damage, extreme heat exposure)
- Accidental damage (tears, stains, dents)
Our conservators can assess the issue, recommend treatment, and design a seasonal care plan tailored to your home’s climate. Or they can clean and conserve your artwork to prevent any further damage. Below is a painting cleaned by our team, bringing the true tones of winter back to a traditional canvas painting.
Talk to Our Team
Worried about winter conditions affecting your artwork? Don’t panic—act early. Submit the form below with details about the artwork and any symptoms you’ve noticed or email us directly info@fineart-restoration.com