How to Clean and Maintain Aluminium Windows & Doors: A Complete South African Guide

Aluminium windows and doors are popular in South African homes because they are durable, weather resistant and relatively easy to maintain. However, low maintenance does not mean no maintenance. Regular cleaning and a few simple checks can help protect the aluminium finish, keep windows opening smoothly, make sliding doors easier to operate and identify worn seals or hardware before they become bigger problems.

Whether you have powder-coated aluminium windows, anodised aluminium frames, sliding doors, top-hung windows, side-hung windows or folding doors, good maintenance starts with gentle cleaning and regular inspection.

This guide explains how to clean aluminium windows and doors, what cleaning products to use, which chemicals can damage aluminium, how to maintain tracks, rollers, handles and seals, and when a window or door needs professional repair.

The Aluminum Association describes architectural aluminium as requiring little maintenance apart from routine cleaning, while QUALICOAT specifically recommends regular cleaning as part of maintaining the corrosion resistance of coated aluminium.

Why Do Aluminium Windows and Doors Need Maintenance?

Aluminium itself is highly durable, but a complete window or door contains much more than aluminium.

Depending on the product, it may include:

• Glass
• Powder-coated or anodised aluminium profiles
• Handles
• Locks
• Rollers
• Tracks
• Hinges
• Friction stays
• Rubber gaskets
• Wool-pile weather seals
• Glazing seals
• Drainage channels
• Weep holes
• Perimeter sealant

These components are exposed to dust, rain, sunlight, insects, pollution and everyday use.

In Gauteng, dry conditions can allow considerable dust and grit to accumulate in sliding tracks and around frames. During building or renovation work, cement, mortar, plaster and other construction materials can create additional risks to aluminium finishes.

Regular aluminium window maintenance therefore protects both appearance and operation.

How Often Should You Clean Aluminium Windows and Doors?

There is no single cleaning interval suitable for every property.

For an ordinary residential property, a practical approach is to inspect and clean the frames periodically rather than waiting until they are visibly dirty.

More frequent cleaning may be required where aluminium windows and doors are exposed to:

• Heavy traffic pollution
• Industrial pollution
• Construction dust
• Coastal salt
• Swimming-pool environments
• Persistent moisture
• Trees and organic debris
• Areas not regularly washed by rain

Coastal, chloride-rich and other aggressive environments deserve particular attention because environmental exposure affects corrosion risk. QUALICOAT’s corrosion guidance specifically considers coastal areas and other environments affected by chlorides.

A simple rule is:

If dirt, salt or building residue is visibly accumulating on the aluminium, don’t wait for the next scheduled clean.

What Do You Need to Clean Aluminium Windows and Doors?

You normally do not need aggressive chemicals or specialist machinery for routine cleaning.

Keep it simple.

Useful cleaning equipment includes:

• Bucket of clean water
• Mild neutral detergent
• Soft sponge
• Soft microfibre cloth
• Soft-bristled brush
• Small brush for tracks and corners
• Vacuum cleaner for loose track debris
• Clean drying cloth
• Glass-cleaning equipment
• Suitable lubricant where required by the hardware manufacturer

The Aluminum Association notes that cleaning and maintenance of aluminium building products generally does not require toxic or aggressive chemical agents.

The safest starting point is usually clean water, a mild cleaner and a soft cloth or sponge.

How to Clean Aluminium Window and Door Frames

Cleaning aluminium frames is straightforward if you do it regularly.

Step 1 — Remove Loose Dirt

Start by removing loose dust, sand, cobwebs and debris.

Pay particular attention to:

• Corners
• Bottom rails
• Sliding tracks
• Around hinges
• Drainage channels
• Behind opening sashes

Removing loose grit first reduces the chance of scratching the finish while washing.

Step 2 — Wash the Aluminium

Use clean water with a mild, suitable detergent.

Apply it using a soft cloth or sponge.

Work gently over the aluminium rather than aggressively scrubbing it.

Step 3 — Clean Corners and Grooves

Use a soft brush to reach narrow areas around:

• Tracks
• Frame corners
• Gaskets
• Hardware
• Drainage channels

Avoid using sharp metal objects to scrape dirt from powder-coated aluminium.

Step 4 — Rinse

Remove detergent residue with clean water.

Do not allow dirty cleaning solution to dry onto the aluminium.

Step 5 — Dry

Wipe the frame with a clean soft cloth where practical.

While cleaning, take the opportunity to inspect the frame for scratches, damaged seals, loose hardware or other problems.

How to Clean Powder-Coated Aluminium Windows and Doors

Powder coating provides aluminium windows and doors with their finished colour.

Common architectural colours include:

Charcoal | Black | White | Bronze

Powder coating is durable, but the coating can still be scratched or chemically damaged.

QUALICOAT publishes specific care guidance for coated architectural aluminium and identifies regular cleaning as one measure that can improve corrosion resistance. It also notes that damage to the coating film, dirt accumulation and poor drainage can reduce corrosion resistance.

For normal cleaning:

Remove loose dirt → wash gently → rinse → dry

Do not try to make stubborn marks disappear by immediately reaching for a stronger chemical.

If a stain does not respond to normal cleaning, first establish what caused it and check the frame or coating manufacturer’s recommendations.

How to Clean Anodised Aluminium Frames

Anodised aluminium has a different surface treatment from powder-coated aluminium and should also be cleaned gently.

Natural anodised or silver aluminium is particularly common on older South African windows and commercial buildings.

Routine cleaning should focus on removing surface dirt without scratching or chemically attacking the finish.

Avoid:

• Abrasive pads
• Steel wool
• Aggressive acids
• Strong alkaline chemicals
• Unverified solvents

The Aluminum Association maintains dedicated care recommendations for anodised and other aluminium finishes.

Harmful Chemicals and Products to Avoid on Aluminium Windows & Doors

This is one of the most important parts of aluminium window cleaning.

A product being described as a household cleaner, building cleaner or heavy-duty cleaner does not automatically mean it is suitable for aluminium.

Strong chemicals can attack exposed aluminium or damage, dull or discolour architectural finishes.

Particular care is required during construction. The Aluminum Association specifically warns that mill-finished and anodised aluminium should be protected from uncured concrete, mortar and similar alkaline substances, as well as muriatic acid used for cleaning masonry.

Product / Chemical	Why to Be Careful
Hydrochloric / muriatic acid	Strong acid; can attack aluminium and is specifically identified as a concern around masonry cleaning
Brick and masonry acid cleaners	May contain acids unsuitable for aluminium
Caustic soda / sodium hydroxide	Strong alkali that can aggressively attack aluminium
Strong alkaline cleaners	Can damage aluminium surfaces and some finishes
Strong acidic cleaners	Can attack aluminium or architectural finishes
Cement and wet mortar residue	Highly alkaline building material; should not be allowed to remain on aluminium
Wet plaster / cement-based products	Can stain or damage aluminium finishes
Chloride-rich chemicals/materials	Chlorides can contribute to corrosion risk under unsuitable conditions
Unapproved strong solvents	May affect coatings, sealants, gaskets or other components
Paint stripper	Can damage powder-coated finishes
Oven cleaner	Often strongly alkaline and inappropriate for aluminium frames
Abrasive cleaning powders	Can scratch or dull the surface
Steel wool	Can scratch the finish and leave contamination
Metal scrapers	Can permanently scratch powder coating or anodising

A Simple Rule for Cleaning Chemicals

If you don’t know whether a chemical is compatible with your particular aluminium finish, don’t apply it directly to the window or door.

Check the aluminium/coating manufacturer’s cleaning instructions first and, where appropriate, test a suitable product on a small inconspicuous area.

This is especially important for powder-coated frames.

Cement, Mortar and Brick Cleaner Can Be Particularly Harmful

Building work presents one of the biggest avoidable risks to newly installed aluminium windows and doors.

Wet:

• Cement
• Concrete
• Mortar
• Plaster
• Grout

should not simply be left on aluminium until the end of the project.

Likewise, using strong masonry acid around completed aluminium windows can create unnecessary risk.

The Aluminum Association specifically advises protecting mill-finished and anodised aluminium from uncured concrete, mortar, similar alkaline substances and muriatic acid used to clean masonry.

Protect your aluminium before plastering, painting, grinding or cleaning brickwork rather than trying to repair damaged finishes afterwards.

How to Clean Aluminium Window Glass

Clean glass makes the biggest visual difference, but take care not to damage the surrounding frame or seals.

Remove loose grit before wiping the glass.

Use a suitable glass-cleaning method and avoid allowing aggressive chemicals to run down onto aluminium profiles, gaskets or sealants.

Different glazing products may require different care, including:

• Clear glass
• Laminated safety glass
• Tinted glass
• Reflective glass
• Obscure/privacy glass
• Double glazing
• Coated glass

Where specialist coated glass is installed, follow the glass manufacturer’s cleaning recommendations.

How to Clean Aluminium Sliding Door and Window Tracks

Tracks are among the most neglected parts of aluminium windows and doors.

Dust, sand, hair, leaves, insects and other debris collect inside them.

Over time, this can interfere with smooth operation.

For aluminium sliding door maintenance:

1. Open the sliding panel.
2. Vacuum loose dirt from the track.
3. Use a soft brush on corners and grooves.
4. Remove remaining debris.
5. Wipe the track clean.
6. Inspect the track for damage.
7. Check that drainage openings remain clear.
8. Test the sliding panel.

Do not automatically solve a difficult sliding door by pouring oil into the track.

The problem may actually be worn rollers, damaged tracks or incorrect alignment.

How to Maintain Aluminium Sliding Door Rollers

A sliding door should move reasonably smoothly without excessive force.

Warning signs of roller problems include:

• Door becoming increasingly heavy
• Scraping sounds
• Grinding
• Door dropping on one side
• Door catching on the track
• Difficulty locking
• Uneven gaps around the panel
• Visible track damage

Cleaning may solve a dirt-related problem.

It will not repair a damaged bearing or badly worn roller.

If the door remains difficult to operate after the track has been properly cleaned, have the rollers, track and alignment inspected.

Should You Lubricate Aluminium Windows and Doors?

Sometimes—but more lubricant is not better.

Different hardware components have different requirements.

Lubricant may be appropriate for certain:

• Hinges
• Locks
• Rollers
• Friction stays
• Mechanical moving parts

But applying heavy oil or grease indiscriminately can attract dust and turn a clean track into a sticky dirt trap.

Follow the hardware manufacturer’s recommendations wherever possible.

Do not spray lubricant over glass, rubber seals or powder-coated surfaces unnecessarily.

Maintaining Top-Hung and Side-Hung Aluminium Windows

Opening windows should be checked while you clean them.

Open the sash slowly and inspect its movement.

Look at:

• Friction stays
• Hinges
• Handle
• Locking mechanism
• Sash alignment
• Gaskets
• Frame
• Drainage

A top-hung window should open smoothly and close evenly against its seals.

If you need excessive force to close it, investigate the cause rather than forcing the handle.

Maintain Aluminium Door and Window Handles

Handles are used constantly and small problems can develop gradually.

Check for:

• Loose screws
• Excessive movement
• Difficulty turning
• Cracked components
• Locking problems
• Misalignment

A handle that suddenly becomes difficult to operate may not necessarily be a faulty handle.

The sash or door itself may be out of alignment.

Forcing the handle can then damage the locking mechanism.

Check Locks and Security Hardware

Locks should engage without requiring excessive force.

If you have to lift, push or pull a door strongly before it will lock, the door may need adjustment.

Regularly check:

Handle → Lock → Keep → Alignment → Fasteners

Security hardware should be repaired when problems first appear rather than after the component fails completely.

How to Care for Aluminium Window Gaskets and Weather Seals

Rubber gaskets and other weather seals help control water, air and dust around aluminium windows and doors.

Inspect them for:

• Cracks
• Shrinkage
• Hardening
• Loose sections
• Missing pieces
• Displacement
• Damage

Do not pull a gasket out simply because one section appears loose.

If it has shrunk or deteriorated, it may need replacement rather than stretching back into position.

Keep Aluminium Window Drainage Holes Clear

This is one of the simplest—and most important—maintenance checks.

Many aluminium window systems contain drainage paths that allow water entering parts of the frame to drain back towards the exterior.

Small outlets in the lower frame are often called weep holes or drainage holes.

Keep them free from:

• Dirt
• Silicone
• Paint
• Plaster
• Insects
• Building debris

Poor drainage is specifically identified by QUALICOAT as one of the conditions that can negatively affect corrosion resistance of coated aluminium systems.

Never seal a hole in an aluminium frame simply because you assume it shouldn’t be there.

It may be an intentional drainage outlet.

Check the Sealant Around Aluminium Windows and Doors

The perimeter joint between an aluminium frame and the building is another important maintenance area.

Inspect external sealant for:

• Cracking
• Separation
• Missing sections
• Holes
• Loss of adhesion
• Deterioration

Pay particular attention to corners and sill areas.

If the sealant has failed, simply applying another layer over dirty or loose material may not provide a durable repair.

The joint should be assessed, prepared and resealed appropriately.

How to Prevent Aluminium Windows From Leaking

If water appears around an aluminium window, don’t immediately assume that the answer is “more silicone.”

Water can originate from:

• Blocked drainage
• Failed perimeter sealant
• Damaged gaskets
• Poor sill detailing
• Cracks in surrounding plaster
• Wall defects
• Roof or flashing problems
• Incorrect installation

Water can enter the building at one location and become visible somewhere else.

Start by finding the actual source.

Protect Aluminium Windows During Renovations

If you’re painting, plastering or renovating, protect completed aluminium windows and doors.

Common construction hazards include:

Plaster | Cement | Mortar | Paint | Grinding sparks | Welding sparks | Aggressive masonry cleaners | Sharp tools

Grinding and welding near glass and aluminium can cause permanent surface damage.

Do not use aluminium window frames as convenient surfaces for mixing, storing or leaning building materials against.

Protection is far easier than trying to restore damaged powder coating afterwards.

How to Remove Paint or Building Residue From Aluminium

Don’t immediately reach for paint stripper, acid or a metal scraper.

First determine:

1. What the contaminant is.
2. Whether the frame is powder coated, anodised or another finish.
3. What cleaning method the finish manufacturer permits.

Aggressive removal can turn a small paint spot into permanent coating damage.

For difficult contamination, get professional advice rather than experimenting with increasingly strong chemicals.

Watch for Early Signs of Aluminium Window or Door Problems

Cleaning is also an opportunity to inspect the product.

Look out for:

• Window sticking
• Sliding door becoming heavy
• Scraping
• Grinding
• Rattling
• Loose handles
• Difficult locks
• Uneven sash gaps
• Draughts
• Water leaks
• Cracked glass
• Damaged gaskets
• Loose glazing beads
• Blocked drainage
• Deteriorating perimeter sealant
• Scratched or damaged coating

Problems are generally easier to address before they cause secondary damage.

Aluminium Windows & Doors Maintenance Schedule

A simple routine can make maintenance much easier.

Item	Regular Cleaning	6-Month Check	Annual Check
Aluminium frames	✓
Glass	✓
Sliding tracks	✓
Drainage holes	✓	✓
Rollers		✓
Hinges		✓
Friction stays		✓
Handles		✓
Locks		✓
Gaskets & weather seals		✓
Perimeter sealant			✓
Frame alignment			✓
Full window/door inspection			✓

Properties exposed to coastal conditions, high pollution, construction dust or other aggressive environments may require more frequent cleaning and inspection.

Cleaning vs Maintenance vs Repair

It helps to distinguish between the three.

Cleaning removes dirt and contaminants.

Maintenance helps keep working components in good condition and identifies deterioration.

Repair corrects something that has already become damaged, worn or incorrectly aligned.

For example:

Dirty sliding track → Clean

Hardware requiring manufacturer-approved lubrication → Maintain

Broken roller → Repair

Cracked glass → Replace glass

Failed gasket → Replace seal

Severely damaged frame → Assess repair or replacement

Don’t continue forcing a door or window that no longer operates properly. That can damage other components.

When Should You Call an Aluminium Window or Door Repair Specialist?

Consider professional assistance when you notice:

• Sliding doors that remain difficult after cleaning
• Damaged rollers
• Damaged tracks
• Windows that no longer close correctly
• Misaligned doors
• Broken handles or locks
• Persistent water leaks
• Failed gaskets
• Cracked or broken glass
• Loose glazing
• Severely damaged aluminium
• Recurring draughts
• Significant corrosion or coating failure

Sometimes a relatively small repair can restore a window or door without replacing the entire unit.

Frequently Asked Questions About Aluminium Window Maintenance

What is the best way to clean aluminium window frames?

For routine cleaning, remove loose dirt first and use clean water, a soft cloth or sponge and a mild suitable detergent. Rinse away residue and avoid abrasive cleaning tools or aggressive chemicals.

Can I use dishwashing liquid on aluminium windows?

A mild detergent may be suitable for routine cleaning, but formulation matters. Avoid products containing aggressive acids, alkalis or abrasive additives and follow the finish manufacturer’s recommendations.

Can I use vinegar on aluminium window frames?

Don’t assume a DIY acidic cleaning solution is suitable for every architectural aluminium finish. For routine maintenance, a mild neutral cleaning approach is safer. Check the coating or aluminium manufacturer’s recommendations before using acidic products.

Can I use bleach on aluminium windows?

Avoid using strong chemical cleaners unless they are specifically confirmed as compatible with the aluminium finish, hardware, gaskets and sealants. Mild routine cleaning usually does not require them.

Can I use brick cleaner near aluminium windows?

Take great care. Some masonry cleaners contain strong acids. The Aluminum Association specifically identifies muriatic acid used in masonry cleaning as something mill-finished and anodised aluminium should be protected from.

Can cement damage aluminium window frames?

Uncured cement, concrete and mortar are alkaline and should not be left in contact with aluminium. Protect windows during construction and remove accidental contamination using an appropriate method before it becomes a larger problem.

Can I use steel wool to clean aluminium?

It is better to use a soft non-abrasive cleaning tool. Steel wool can scratch the finish and is unnecessary for normal aluminium-window maintenance.

Should I lubricate aluminium sliding door tracks?

Keep the track clean first. Don’t automatically coat tracks with heavy oil or grease, as this can attract dirt. Follow the roller or door-system manufacturer’s lubrication recommendations.

How do I clean aluminium window drainage holes?

Remove loose dirt carefully without damaging the frame. Do not push silicone, paint or debris further into the drainage channel. If water still cannot drain, the system may need further inspection.

Why is my aluminium sliding door difficult to open?

Common causes include dirt in the track, worn rollers, damaged tracks, poor adjustment or door misalignment. Cleaning the track is a good first step, but mechanical problems may require repair.

How long do aluminium windows and doors last?

Service life depends on product quality, finish, installation, environment, use and maintenance. Regular cleaning, good drainage and early attention to damaged coatings or hardware can help preserve performance.

A Simple Aluminium Window & Door Care Routine

You don’t need to turn aluminium window maintenance into a complicated job.

Remember these seven basics:

Clean the frames → Clean the tracks → Clear the drainage holes → Check seals → Check hardware → Inspect perimeter sealing → Repair problems early

Avoid aggressive cleaning chemicals and abrasive tools, and pay particular attention to aluminium during building and renovation work.

Well-maintained aluminium windows and doors should remain attractive, weather resistant and easy to operate for many years. Regular cleaning also gives you the opportunity to spot worn rollers, damaged tracks, failing seals, loose handles, drainage problems and cracked glass before they develop into more expensive repairs.

For homeowners in Johannesburg, Pretoria and Gauteng, preventative care is particularly useful where dust and seasonal weather expose windows and doors to changing conditions. When cleaning and basic maintenance are no longer enough, professional aluminium window repairs, aluminium door repairs, sliding door repairs, glass replacement and replacement aluminium windows and doors may be the better solution.