Europe · Window Manufacturer
Hajom — Window Cleaning Guide
🇸🇪 Sweden · Last reviewed by Justin Orloff
Quick Facts
founded
1911
hq
Hajom, Västra Götaland, Sweden
primaryMaterials
Timber (spruce, oak, teak, ash, meranti, accoya, sapeli), timber/aluminium
glazingPartner
Own glazing production
marketTier
Premium
Brand at a Glance
- Founded: 1911
- HQ: Hajom, Västra Götaland, Sweden
- Market position: Specialist Swedish sliding door and window manufacturer, part of Inwido Group
- Frame materials: Timber (spruce, oak, teak, ash, meranti, accoya, sapeli), timber/aluminium composite
- Key ranges: Classic Series, Architect Series, Architect Gen 2
- Glazing options: Triple glazed standard. Argon gas fill. Low-E energy glass. Warm-edge spacers. U-values from 0.65 W/m²K. Self-cleaning, solar control, and acoustic glass available.
- Where they sell: Sweden, Nordic markets, selected European markets via Inwido distribution
- Warranty: 10 years on timber components against rot, 10 years against inter-pane condensation, 10 years on product function. Maintenance-conditional.
- Website: hajom.com
- Official care documentation: hajom.com/kopguide/ta-hand-om-dina-produkter
Product Range
- Classic Series
- Architect Series
- Architect Gen 2
Why This System
Large-format glazing demands adapted squeegee technique - full-height sliding panels can be several metres wide, and water management at the frame edges becomes more demanding at this scale. Thermally hardened glass can carry small raised particles in the surface layer - a by-product of the hardening process that makes the glass scratch more easily than standard float glass. Timber thresholds require oiling a minimum of twice per year - not just cleaning. Dry thresholds crack and void the warranty. Hajom supplies timber with base oil only, not a complete finish. The first full treatment must happen immediately after installation. The 10-year warranty is explicitly maintenance-conditional per Hajom's guidelines and TMF standards.
Step 1 of 2: Manufacturer Recommendations
Official Care Guidance
Step 2 of 2: The Orloffs Protocol
The Orloffs Protocol
This is how I clean Hajom windows. The tools and technique below come from 25 years of daily professional work on the glass. Every step has been tested on real installations and adapted specifically for Hajom systems.
Pro Tools
My daily tool list. This is what I carry to every job.
Follow these steps in order. Each one builds on the last. This is the same sequence I use on every Hajom installation.
- 1
Preparation -- before any water touches the glass
Fill the bucket with at least 10 litres of water. Add soap for cleaning power -- enough to cut through environmental deposits, not so much you are fighting foam.
Before touching the glass, brush down the surface to remove loose dust, spiderwebs, and debris. Any grit left on the glass during the wash phase risks scratching during agitation.
Check the timber frame condition before you start. Confirm which cleaning product is safe for that surface before opening any bottle.
Cover anything below the windows that cannot be moved.
- 2
Agitation -- apply and work the solution
Dip the microfiber T-bar completely into the soap water, both sides. Remove excess water with your hand so it does not drip. Apply the solution across the entire glass surface with overlapping passes.
The goal is to fully dissolve and release every deposit from the glass surface. Anything not released during agitation gets transported across the glass by the squeegee as a smear.
For stubborn spots -- insect marks, salt residue, environmental deposits -- re-apply soap water and allow it to soak for a full minute before agitating again. Use more soap water, not more pressure.
For panels above arm reach: attach the T-bar to an extension pole. Work in sections -- top first, then middle, then bottom -- keeping each section wet until you squeegee it.
Rinse the T-bar cover regularly during the job. A dirty applicator causes microscopic scratches that accumulate over time.
- 3
Detail the frame edge before squeegeeing
Use your 100% cotton towelling rag, finger pressed into the fabric, to work into every junction and remove pooled soap water before the squeegee pass.
This prevents drips running down onto already-cleaned areas during squeegeeing and keeps soap water out of drainage channels.
On Hajom timber frames, pay particular attention to the bottom edge where glass meets the frame sill -- water pooled here runs into drainage openings and leaves residue over time.
- 4
The squeegee
Tilt the squeegee at a slight angle so soap water spills from one side of the channel only -- not both. If the rubber is jumping or squeaking, either the rubber is not lubricated enough or the glass surface has warmed.
Cutting in: start with the rubber blade making first contact on a dry edge of the glass.
Side to side: horizontal passes across the panel. Works well on wide sections. Top to bottom: vertical passes down the panel. Works well on tall narrow sections.
The J tune: one smooth unbroken motion top to bottom, wrist rotating at each end to reverse without lifting the rubber. The most efficient method on larger panels -- but it requires training before applying it to premium glass.
Wipe the rubber dry after every pass. Overlap each stroke by 2-3 cm.
- 5
Final edge detailing
After squeegeeing, there is always a residual line of water along the bottom edge and at the panel sides. Take a dry cotton rag, fold to a clean corner, and detail these edges in one smooth pass.
On Hajom frames, the bottom edge where glass meets the sill requires the most careful attention. Water left here runs into drainage and leaves residue that affects the next clean.
Rotate the rag to a clean section after every pass. If the rag picks up grit at any point, replace it immediately.
- 6
Frame wipe and hardware check
On Hajom timber frames: use a barely damp cloth and dry immediately. Never allow water to sit on timber joints or frame corners -- moisture causes swelling and paint failure.
Check that all drainage openings are clear and unobstructed. Water must be able to flow freely -- a blocked channel leads to accumulation that affects seal performance over time.
Operate every opening window through its full range. Stiff handles or resistance at locking points indicate hardware that needs lubrication. Flag it to the owner rather than forcing it.
Pro Tips
- Never use hard scrapers or abrasive pads on Hajom glass - the thermally hardened surface scratches permanently and damage cannot be reversed.
- Never use products containing fluoride or phosphoric acid on the glass - Hajom specifically prohibits these as fluoride causes the glass surface to rust.
- Always clean frames and tracks before touching the glass - grit transferred from the track onto a large panel creates visible scratches across metres of expensive glazing.
- Oil hardwood thresholds at least twice per year - a dry threshold cracks and voids the warranty. This is a financial decision, not just a maintenance one.
- Lubricate the sliding track with paraffin wax or a candle stub - Hajom specifically recommends this and it costs almost nothing.
- Keep records of all maintenance performed - the 10-year warranty is explicitly conditional on following Hajom's care guidelines.
What NOT To Do
- Do not use hard scrapers on the glass surface. Hajom's thermally hardened glass scratches permanently.
- Do not use abrasive cleaning products or powder-based cleaners on glass.
- Do not use any cleaning product containing fluoride. Fluoride causes Hajom glass to rust.
- Do not use any product containing phosphoric acid on the glass.
- Do not apply adhesive tape or stickers to Hajom glass.
- Do not clean the glass in direct sunlight. The solution dries before it can be removed and bakes onto the surface.
- Do not allow stain, paint, or oil to contact hardware, runners, seals, or glass joints during maintenance. Wipe off any contact immediately.
- Do not close the door or window before surface treatments are fully dry.
- Do not leave timber frames unfinished or un-oiled after installation.
- Do not skip the regular oiling schedule on hardwood thresholds. Dry thresholds crack and void the warranty.
Bundle Kits and Tool Recommendations
Bundle Kit
Cleaning Frequency
Glass and frames: 2x per year minimum (Inside and out.). Urban, coastal, or south-facing panels: 4x per year (Quarterly cleaning recommended.). Hardwood thresholds: 2x per year minimum (Spring and autumn oiling with clear exterior oil.). New installations: Immediately after installation (Then twice yearly for the first three years.). Sliding track lubrication: 2x per year (Or whenever the door becomes harder to slide.). EPDM gasket inspection: Once per year (Or after heavy storms.)
Frequently Asked Questions
Field Notes
“Glass and frames: minimum twice per year inside and out. Urban and coastal environments, or panels facing south or southwest: quarterly cleaning recommended. Hardwood thresholds and exposed oiled timber: oil a minimum of twice per year, spring and autumn. New installations: oil all timber surfaces immediately after installation, then twice yearly for the first three years. Sliding track lubrication with paraffin wax: twice per year, or whenever the door becomes harder to slide. EPDM gasket inspection: once per year, or after heavy storms.”
Justin Orloff
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