Asia-Pacific ยท Profile System
STEP-G โ Window Cleaning Guide
๐ฏ๐ต Japan ยท Last reviewed by Justin Orloff
Quick Facts
founded
Part of Sankyo Tateyama group
hq
Operations in Germany, Belgium, and China; parent in Toyama, Japan
primaryMaterials
Aluminium extrusion profiles - raw and powder-coated
glazingPartner
Profiles supplied to fabricators - glazing specified by fabricator
marketTier
Commercial Extrusion Supplier
Brand at a Glance
- Parent company: Sankyo Tateyama Inc., Japan
- Production locations: Germany, Belgium, China
- Product: Aluminium extrusion profiles for window fabrication and construction
- Markets: Europe (Germany, Belgium facilities) and Asia (China facility)
- End use: Commercial window fabrication, construction profiles, industrial extrusion
Product Range
- Standard extrusion profiles
- Powder-coated extrusion
- Anodised extrusion
Why This System
STEP-G is a materials supplier. The window cleaner's relevant knowledge is that STEP-G extrusions in European windows follow European powder coat and anodising standards - not the Japanese standards that apply to TOSTEM or YKK AP residential products. European STEP-G extrusions in commercial construction are subject to the same care protocols as any European commercial aluminium window. The Japan connection is corporate ownership, not a different material science.
Step 1 of 2: Manufacturer Recommendations
Official Care Guidance
Step 2 of 2: The Orloffs Protocol
The Orloffs Protocol
Since 1999 I've cleaned hundreds, if not thousands, of different window brands and systems. The physics of clean glass don't change from one brand to the next. Follow the steps below and you'll clean your STEP-G windows to a professional standard โ guaranteed.
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 STEP-G 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 uPVC 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 Step G uPVC 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 Step G 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 Step G uPVC frames: solvent-free pH-neutral cleaner only -- solvents cause permanent surface damage. Avoid abrasive pads on the profile.
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
- STEP-G profiles are not distinguishable from other European commercial aluminium by appearance - you will not know you are looking at a STEP-G extrusion unless the fabricator tells you. Apply standard European commercial aluminium care to all commercial aluminium you encounter in European projects
What NOT To Do
- Do not use alkaline cleaners on anodised STEP-G profiles
- Do not use abrasive pads on any profile finish
- Do not use acidic cleaners on anodised profiles
Bundle Kits and Tool Recommendations
Bundle Kit
Cleaning Frequency
Clean every 4โ8 weeks depending on environment.
Frequently Asked Questions
Field Notes
โIf a European commercial project uses STEP-G extrusions, the care protocol follows European commercial aluminium standards - Qualicoat powder coat or Qualanod anodising. The corporate parent being Japanese does not change the European finishing standard.โ
Justin Orloff
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