How to care for plastic windows in winter

How to care for plastic windows in winter

Summary

• Regular cleaning of frames, glass and seals preserves thermal performance.
• Lubricating hardware and checking sash pressure prevents drafts.
• Controlling condensation protects against mold and preserves indoor air quality.
• Insulation and proper ventilation work together for comfort.
• Avoid harsh chemicals and sudden temperature shocks.
• Inspect drainage and sealed units before deep freeze.

Why winter care matters

PVC windows are durable and energy efficient, but neglect can reduce their performance. Worn seals, frozen hardware, and persistent condensation lead to heat loss, higher energy bills, and potential mold growth.

Monthly maintenance checklist

• Glass cleaning: use a microfiber cloth and warm soapy water. Avoid abrasive pads and solvents that can damage seals and profiles.
• Frames and sills: wipe down with a damp cloth and a soft brush for corners.
• Seals: clean gently, inspect for cracks or hardening. Replace seals that have lost elasticity.
• Hardware: remove dirt and apply a silicone-based lubricant or a window-specific spray. Do not use motor oil.

Hardware adjustment and sash pressure

• Test sashes for smooth opening and closing. Stiff movement or grinding indicates maintenance is needed.
• Many PVC windows have adjustment screws for sash pressure. Increasing pressure can reduce drafts during winter.
• If unsure, hire a professional — incorrect adjustment may damage the mechanism.

Condensation control and ventilation

• Condensation occurs when indoor humidity is high and window surfaces are cold. Regular short airing (5–10 minutes) several times a day helps.
• Use exhaust fans in kitchens and bathrooms while cooking or showering.
• Avoid covering radiators with heavy curtains; allow warm air to reach the window surface.

Quick draft test: move a small flame or light along the window joints. Flickering indicates air leakage.

Preventing ice and frost buildup

• Do not force off ice from seals — it can tear the rubber.
• Remove frost with warm (not hot) water or isopropyl-alcohol based solutions in low concentration.
• If manufacturer allows, micro-ventilation can reduce ice formation on very cold nights.

Emergency steps for leaks and drafts

• Dry any wet areas immediately to prevent mold.
• Fogging between panes indicates a failed sealed unit — replacement is advisable.

Practical DK-Logi tips

• Use silicone lubricants for moving parts and drainage channels.
• Annual or pre-winter servicing reduces the chance of failures.
• Keep service contacts and warranty documents accessible.

Frequently Asked Questions (FAQ)

Should I lubricate window hardware before winter?

Yes. Silicone-based lubricants or window-specific sprays maintain smooth operation and reduce wear. Lubricate moving parts once or twice a year, preferably before winter.

How to deal with mold on the windowsill?

Remove mold with a soft brush, treat with diluted white vinegar or a commercial mold remover, then dry thoroughly. Identify and correct the moisture source (condensation, leaks).

Can I wash windows in freezing temperatures?

It's not recommended. Water can freeze and damage seals and hardware. If washing is necessary, use warm water and dry immediately in short intervals.

When to replace window seals?

Replace seals if you feel drafts at the closed sash, hear street noise, or see visible deformation. Typical service life is 5–10 years depending on conditions.

What cleaning agents are safe?

Mild household cleaners without acetone or aggressive solvents. For seals, warm water with neutral soap or rubber-safe cleaners is best.

If you're unsure about diagnostics or adjustments, contact DK-Logi service. Professional inspection can prevent costly repairs and keep your home warm and comfortable all winter.