Frequently Asked Questions

Signs your double glazed window seals need replacing include condensation between the panes, drafts near the window, and visible mould or discoloration.

• Foggy or cloudy patches inside the glass indicate seal failure.
• Increased drafts and cold spots near windows suggest air leakage.
• Moisture ingress leads to condensation and potential mould growth.
• Seal lifespan typically ranges from 10 to 20 years depending on conditions.
• For detailed info, visit our Why Replace Window Seals - Energy, Comfort, Cost page.

You can extend the lifespan of your double glazed windows by performing regular biannual inspections and using proper cleaning techniques.

• Inspect seals early to detect failures up to 80% sooner.
• Use ammonia-free, pH-neutral detergents and microfiber cloths for cleaning.
• Avoid abrasive materials and high-pressure washers.
• Clean windows on overcast days to prevent streaks.
• Maintain frames according to their material (uPVC, timber, aluminium).
• More care tips are available on our Double Glazing Care Tips 2026 page.

We use high-quality sealants like butyl or polysulphide compounds to create airtight seals that maintain insulation and prevent moisture ingress.

• Seals trap insulating gases such as argon between glass panes.
• They prevent drafts, heat loss, and condensation inside double glazing.
• Proper seals sustain the thermal performance and longevity of your windows.
• Damaged seals lead to foggy glass and higher energy bills.
• Learn more about the role of seals on our Why Replace Window Seals - Energy, Comfort, Cost page.

Yes, you can safely clean your double glazed windows yourself by using ammonia-free, pH-neutral detergents and soft microfiber cloths.

• Avoid abrasive materials like steel wool or scouring pads.
• Do not use ammonia-based cleaners repeatedly as they degrade sealants.
• Clean frames with materials suitable for their specific type (uPVC, timber, aluminium).
• Clean windows on overcast days to avoid streaks.
• For detailed cleaning instructions, see our Double Glazing Care Tips 2026 guide.

Our top window hinge and alignment repair service in 2026 ensures your windows operate smoothly and seal properly. We provide:

• Inspection of hinges, handles, and locking mechanisms for wear or damage
• Realignment of window sashes to eliminate drafts and improve security
• Lubrication of moving parts to prevent squeaks and stiffness
• Replacement of faulty hinges or hardware with quality components
• Testing to confirm proper operation and airtight sealing Regular maintenance like this extends window lifespan and maintains energy efficiency. For maintenance tips and benefits, see Why Window Maintenance Saves 15% Energy & Prevents Repairs.