Your Maintenance Guide
To keep your windows, doors, and hardware in optimal condition and ensure your warranty remains valid, please follow our maintenance instructions for each product type. Detailed guidance can be found in the sections below.
We offer a full maintenance and repair service, including adjustments, resealing, lubrication, and finish restoration — all carried out by our qualified technicians to manufacturer standards.
uPVC Windows & Doors Care
Aluminium Windows & Doors Care
Cleaning Instructions
Frequency: 3–6 months depending on usage.
Products: Soft cloth + mild detergent, specialized aluminium cleaners if needed.
Avoid: Abrasives, acids, solvents, steel wool, high-pressure cleaning.
Lubrication & Moving Parts
Annually (or more often for heavy use).
Use silicone spray or PTFE for sliding rails. Avoid grease attracting dirt.
Finish Care
Anodized: Mild detergent.
Powder-coated: Mild detergent; minor scratches can use touch-up paint.
Warnings & Environmental Tips
Industrial/coastal areas: more frequent cleaning.
Do not force locks or mechanisms.
Cleaning Instructions
Standard frames: Soap & water; avoid solvent-based cleaners.
Foiled frames: Soap & water only.
Hardware/furniture: Mild soap solution, no abrasives.
Glazed units: Remove jewellery, avoid pressure on leaded strips.
Lubrication & Moving Parts
Locks: Light machine oil or silicone spray.
Friction hinges, keeps, espags: Oil pivot points; keep tracks clean.
Hinges: Clean only; no lubrication needed.
Finish Care
Foiled frames: Touch up minor scratches with RAL pen.
Warnings & Tips
Avoid abrasive/solvent cleaners.
Keep drainage slots clear.
Lock all windows when unattended.
Timber / Hardwood Windows & Doors Care
Composite Doors Care
Cleaning Instructions
Frequency: Twice a year.
Products: Damp cloth + mild detergent; rinse well.
Avoid: Abrasives, bleach, ammonia, solvents.
Lubrication & Moving Parts
Annually: Light machine oil or non-abrasive grease.
Finish Care
Painted: Acrylic primer + topcoat.
Stained: Quick-drying woodstain, lighter shade for maintenance.
Brush-coat exposed end grains with preservative before installation.
Warnings & Environmental Tips
Coastal/heavy industry: every 3 months for hardware/seals.
Avoid coarse sanding; immediate repair of damaged paint.
Cleaning Instructions
Every 4 months. Soft brush + warm soapy water.
Avoid abrasives, high-pressure wash, solvent cleaners.
Lubrication & Moving Parts
Use 3-in-1 oil or silicone spray on handles and multipoint locks.
Finish Care
Typically durable; regular cleaning is enough.
Warnings
Ensure door is properly sealed. Dry thoroughly after cleaning.
Cleaning Instructions: Soap & water or mild glass cleaner; avoid scratches and strong chemicals.
Lubrication / Finish Care: Not applicable to glass; see window/door hardware.
Warnings: Do not attempt to open sealed units; fogging indicates seal failure.
Sealed Glass Units Care
Cleaning:
Wipe with mild soap and water; avoid abrasives, harsh chemicals, and high-pressure sprays.
Lubrication
Hinges: Light machine oil or silicone spray on pivot points; keep tracks clean.
Locks: Lubricate sliding components and keeps with light oil or non-abrasive grease.
Sliding rails: Use dry lubricant (PTFE spray).
Avoid grease that attracts dust or oils with acids/resins.
Finish Care
Regular cleaning usually enough; minor scratches on uPVC hardware can use a touch-up pen.
Tips & Warnings
Don’t force stiff mechanisms.
Coastal or industrial areas require more frequent maintenance.
Ensure all locks are fully engaged for security.
Locks, Hinges & Moving Parts Care
Disclaimer
These maintenance guidelines are provided to help you care for your products safely and effectively. However, HZ Double Glazing cannot be held responsible for any injury, damage, or product failure resulting from incorrect handling, cleaning, or maintenance carried out by others.
If you are unsure about any maintenance task or your products require professional attention, please contact our team.
We offer a full maintenance and repair service, including adjustments, resealing, lubrication, and finish restoration — all carried out by our qualified technicians to manufacturer standards.