Double glazed doors are a smart upgrade for any home, delivering excellent thermal performance, quieter interiors, and improved security. Like any long-term investment, they reward simple, routine care. Regular maintenance extends the lifespan of your double glazed doors, preserves their appearance, keeps warranties in good standing, and ensures smooth day-to-day operation. The tips below will help you keep them looking and performing their best. For broader context on energy-efficient openings, see this overview of windows and doors from the U.S. Department of Energy.
1. Regular Cleaning
Routine cleaning prevents dirt, grime, and airborne pollutants from degrading finishes, rollers, and weather seals over time.
- Glass Cleaning: Use a soft or microfiber cloth with a mild glass cleaner or a 1:1 vinegar-and-water solution. Avoid abrasive pads, harsh chemicals, pressure washers, and razor blades, which can scratch coatings. For a streak-free finish, clean in the shade and dry with a lint-free cloth. Clean interior and exterior panes at least twice a year—or more often in coastal, high-dust, or urban pollution areas.
- Frame Cleaning: Wipe frames with warm, soapy water and a soft cloth; rinse and dry to prevent water spots. For uPVC, a purpose-made uPVC cleaner can lift stubborn marks. Avoid solvent-based products that may dull or damage finishes. For timber, promptly remove bird droppings and sap, which can break down coatings.
- Tracks and Thresholds: For sliding or folding systems, vacuum debris from tracks and thresholds, then wipe with a damp cloth. Keeping these areas clear reduces strain on rollers, prevents binding, and improves operation.
2. Inspect Seals and Gaskets
Perimeter seals and gaskets keep your doors energy efficient by preventing drafts and moisture ingress. Sunlight, temperature swings, and daily use can compress or degrade them over time.
- Visual Inspection: Check for cracking, flattening, shrinkage, or gaps—especially in corners and areas exposed to strong sunlight. Ensure seals sit evenly against the frame when the door is closed and that there are no missing sections.
- Draft Test: Close the door and run your hand along the edges to feel for cold air. You can also use the “paper test”: shut a sheet of paper in the door—if it pulls out easily, the seal or alignment may need attention. Replace damaged seals with the manufacturer’s recommended profile, and consider a professional adjustment if drafts persist. For more on weatherstripping basics, see this guide to air sealing and weatherstripping from Energy Saver.
3. Lubricate Moving Parts
Hinges, handles, locks, and rollers work best when kept clean and correctly lubricated.
- Lubrication Schedule: Once or twice a year, apply a light silicone or PTFE (dry) lubricant to hinges, multipoint locks, and moving hardware. Avoid oil-based products that attract dust and grime.
- Handles and Locks: If handles feel stiff, apply a small amount of lubricant to the mechanism and operate several times to distribute it evenly. Wipe away any excess. For key cylinders, use a dry graphite or PTFE product rather than oil-based sprays. If problems persist, consult a professional locksmith, such as those accredited by the Master Locksmiths Association in Australia and New Zealand.
- Sliding Door Rollers: Clear debris from rollers and tracks before lubricating. If the door still drags or judders, the rollers may need adjustment or replacement.
4. Check for Condensation
Well-performing double glazing reduces condensation, but moisture between the panes signals a failed seal in the insulated glass unit (IGU).
- What to Look For: Persistent fogging or moisture trapped between panes indicates a compromised seal and a loss of insulating gas. Note that interior or exterior surface condensation can occur with temperature changes and high indoor humidity—this is different from moisture within the IGU. For more on managing household humidity and condensation, see this overview from Your Home (Australian Government).
- What to Do: If you suspect seal failure, consult a professional glazier to assess the unit. In many cases, the IGU can be replaced without changing the entire door. For additional background on condensation causes and prevention, see this overview from InterNACHI.
5. Repaint or Reseal as Needed
Protective finishes keep frames looking good and shield them from the elements. The right approach depends on the frame material.
- Wooden Frames: Inspect for peeling paint, hairline cracks, and signs of water ingress. Lightly sand, prime bare timber, and apply a high-quality exterior paint or clear sealant every few years, depending on exposure. Keep sealant joints intact to block moisture and consider more frequent touch-ups in coastal or full-sun locations.
- uPVC Frames: These are low-maintenance; periodic cleaning usually suffices. If color fades, use a uPVC-compatible paint formulated for exterior use and follow manufacturer guidelines. Avoid unapproved dark colors that can increase heat absorption unless the system is rated for it.
- Aluminium or Composite Frames: Wash down periodically and check for chips or scratches in powder-coated finishes. Touch up as recommended by the manufacturer to prevent corrosion and maintain appearance.
6. Keep Drainage Channels Clear
Most units include drainage channels or weep holes that allow water to escape and prevent pooling.
- Regular Checks: Inspect for dirt, leaves, insect nests, or paint overspray that can block water flow. These blockages can cause leaks, standing water, and mold.
- Cleaning the Channels: Use a small brush or vacuum attachment to clear debris. Test by gently pouring a small amount of water into the channel and confirming it exits through the weep holes. Never plug weep holes for cosmetic reasons. Learn more about how weep holes work in this guide from Pella.
7. Confirm Alignment and Hardware Adjustment
Over time, heavy glazed doors can settle or shift slightly, affecting latching, weather tightness, and security.
- Hinge and Roller Adjustments: If the door rubs, doesn’t latch cleanly, or has uneven gaps, minor adjustments to hinges, keeps, or rollers can restore smooth operation. Seasonal expansion and contraction can also change clearances. Consult your door’s manual or a professional if you’re unsure.
- Security Check: Ensure multipoint locks engage fully and that screws on keeps, handles, and hinges are snug. Replace damaged or missing fixings with manufacturer-approved parts.
8. Consider Professional Maintenance
While most care is DIY-friendly, periodic professional service offers peace of mind and can preserve warranties.
- Annual Check-Up: A qualified technician can assess seals, adjust hardware, verify drainage, and identify early signs of failure. This helps avoid costly repairs later. To locate qualified glazing professionals and consumer resources, visit the Australian Glass and Window Association (AGWA).
- When to Call: Seek prompt help if the door becomes difficult to operate, doesn’t close or lock properly, or if glass is cracked or fogging between panes. For general guidance on window and glazing performance, see the Australian Government’s resource on windows and glazing.
Conclusion
Consistent, simple maintenance keeps your double glazed doors efficient, attractive, and easy to use. By cleaning regularly, inspecting and replacing worn seals, lubricating moving parts, monitoring for condensation, refreshing finishes as needed, keeping drainage pathways clear, and booking occasional professional check-ups, you’ll enjoy long-lasting performance, lower energy costs, and a more comfortable home.