Painted miniatures are tougher than they look and more fragile than you'd hope: acrylic paint, plastic, resin, superglue and varnish each have an environmental enemy. Most “mystery” damage — bowed spears, clouded varnish, models that shed an arm in storage — traces back to where the box lived, not how it was packed. Here's the rogues' gallery.
Quick answer: avoid the loft (heat softens glue and warps resin), the garage or shed (damp clouds varnish and rusts pins), sunny windowsills (UV fades paint), and shelves over radiators or in kitchens (heat and grease). A cool, dry, dark room indoors, with a stable temperature, is ideal.
The loft: slow-motion oven
UK lofts swing from sub-zero to 45–55°C+ in a heatwave. Heat softens plastic (long thin parts — spears, banner poles, barrels — bow under their own weight), accelerates superglue failure, and heat-cycling works every joint loose. Resin warps lower still. If you remember one thing: never summer-store miniatures in a loft. The same heat logic applies to parked cars — an afternoon on a parcel shelf in July can soften both models and polymer accessories.
The garage and shed: damp does the quiet damage
Unheated outbuildings mean humidity and condensation cycles. Damp blooms varnish (milky patches), corrodes metal models and magnets (rust spots through paint — relevant if you've magnetised your bases), breeds mould on foam trays, and degrades the foam itself into crumbs that embed in paintwork. Cardboard boxes wick floor moisture upwards. If a garage is genuinely your only option: sealed plastic crates, silica gel sachets (refresh quarterly), off the floor.
The windowsill: UV, the paint thief
Direct sunlight is the most damaging place models are deliberately put, because windowsills feel like display spots. UV breaks down acrylic pigments — reds and purples first — and yellows varnish in a year or two of daily sun. The fade is gradual, so you don't notice until you set a faded model next to a fresh one. To put numbers on it, the Canadian Conservation Institute notes that light damage is cumulative and proportional to intensity — the rate runs roughly 1,000 times faster in direct sunlight than at gentle museum display levels. And glass is no real defence: ordinary window glass still passes around half of all UVA light. The fix costs nothing: display on walls and shelves that never get direct sun. Our cabinet guide and wall shelf guide both treat sun-safe placement as rule one.
The radiator shelf and the kitchen
The shelf above a radiator gets daily heat-cycling (glue joints, warping) plus a rising column of dust delivered straight onto your models. Kitchens add airborne grease that bonds dust onto varnish — the “bonded grime” tier of our cleaning guide. Bathrooms: humidity, see garage.
Where models are happy
The boring answer: where you're happy. Living spaces hold 15–25°C and moderate humidity year-round — ideal for plastic, paint and glue. Which is the practical argument for displaying your collection rather than storing it: a shelf, cabinet or tiered stand in a lived-in room is environmentally safer than any loft, garage or under-bed crate. (It also means you actually see the things — our army display planning guide covers getting a whole force out of boxes.) WarSplay® display stands are made for exactly this — living-room-safe, matte and sized for 25mm–80mm bases across the range. Compatible with miniatures used in Warhammer 40,000, within the stated base-size limits.
Safe storage checklist (for what must be boxed)
- Indoor cupboard or under-bed in a heated room — never loft/garage if avoidable.
- Varnish everything first (guide).
- Plastic crates over cardboard; silica gel in each.
- Magnetised steel trays or clean foam — inspect foam yearly for crumbling.
- Long thin parts supported or detached — gravity plus warmth bows them.
Frequently asked questions
Can miniatures be stored in a loft over winter?
Winter is survivable (cold itself is fairly harmless, though brittle); the danger is forgetting them till August. If the box might still be there in summer, don't start.
Why did my varnish turn milky in storage?
Moisture — either damp storage after varnishing or humidity cycling in an outbuilding. A fresh coat of gloss varnish over the bloom, then matte over that, usually clears it.
Does UV-resistant varnish stop fading?
It slows it meaningfully but doesn't make sunlight safe. Treat it as insurance on top of sun-safe placement, not instead of it.
WarSplay® is an independent UK brand of Blubbercove Ltd. Trademarks are used for compatibility description only; see the disclaimer in our site footer.