According to Antony Heath, Marketing and Development Director at Glevum Windows, adhesive decorations, candles and hanging lights are among the most common culprits for post-Halloween window damage.
“We often see people using superglue, tape, or sticky decals directly on glass or uPVC frames,” says Heath.
“When these are peeled off, they can leave behind residue or even scratch the surface especially if grit gets trapped underneath. Over time, that can affect both appearance and energy efficiency.”
Even lightweight fake cobwebs or string lights can create problems if they’re attached using nails, staples, or heavy-duty adhesives. In windy weather, they can rub against glass and create micro-scratches that aren’t immediately visible but can weaken the surface over time.
“We also see sealant and paint damage from decorations that have been fixed too tightly or left up for weeks,” Heath adds. “It’s small things like that which can lead to condensation issues or draughts later in the season.”
Antony then went on to share his top tips for decorating safely this Halloween.
1. Avoid sticky adhesives
Opt for static window clings or suction hooks instead of tape or glue.
These will hold decorations securely without leaving behind residue or damaging paintwork.
2. Keep décor off the glass
Hang lights or cobwebs from curtain rails or shelves rather than directly on the window.
Even light materials can scratch or wear down glass coatings when exposed to wind or vibration.
3. Skip the real candles
Use LED lights to avoid heat damage or soot residue.
Real flames can cause glass to expand unevenly, leading to cracks or thermal stress especially in double glazing.
4. Clean carefully after removal
Use mild soap and a microfibre cloth, not blades or abrasive cleaners.
Avoid the temptation to scrape at leftover residue. This can cause permanent micro-scratches.
5. Inspect after Halloween
Check for loose seals, chips, or residue before winter sets in.
Spotting small issues early can help prevent bigger problems like draughts and condensation later in the year.
“Halloween is meant to be fun, and decorating is part of that, but people don’t always realise how delicate their windows and frames can be,” Heath concludes.
“With a few small adjustments, you can enjoy your spooky setup without any nasty surprises when the decorations come down.”
