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Asia-Pacific ยท Profile System

STEP-G โ€” Window Cleaning Guide

๐Ÿ‡ฏ๐Ÿ‡ต 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

No official guide published. The steps below are based on Justin Orloff's 25 years hands-on experience with this system.

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.

1Microfiber T-bar applicator, kept clean and rinsed regularly to prevent grit
2Professional squeegee with a fresh rubber blade
3Extension pole for glass above arm height
4Bucket with at least 10 litres of water and enough soap for cleaning power without excess foam
5100% cotton towelling rags for edge detailing
6Vacuum for sill tracks and base profiles

Follow these steps in order. Each one builds on the last. This is the same sequence I use on every STEP-G installation.

  1. 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. 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. 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. 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. 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. 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.

Watch the Window Cleaning Manifesto hereSee these techniques in action. Free, 5 minutes, lifetime access.

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

Orloffs Squeegee Pro Pack flat lay
Pro KitThe full professional setup. Brass squeegees, T-bar with applicator cover, tool belt, rags, soap, and bucket. Everything from the daily tool list in one box.Shop now โ†’
Orloffs Squeegee Pro Pack bundled

Cleaning Frequency

Clean every 4โ€“8 weeks depending on environment.

Frequently Asked Questions

How often should I clean STEP-G windows?
For STEP-G windows, we recommend cleaning twice a year depending on your local environment. Coastal or urban locations may need more frequent cleaning.
What tools do I need for STEP-G windows?
Professional cleaning of STEP-G windows requires my daily tool list of: Microfiber T-bar applicator, kept clean and rinsed regularly to prevent grit, Professional squeegee with a fresh rubber blade, Extension pole for glass above arm height, Bucket with at least 10 litres of water and enough soap for cleaning power without excess foam, 100% cotton towelling rags for edge detailing, Vacuum for sill tracks and base profiles.
What should I avoid on STEP-G windows?
Do not use alkaline cleaners on anodised STEP-G profiles
Does STEP-G publish an official cleaning guide?
STEP-G has not published an official cleaning guide. The protocol on this page is based on Justin Orloff's 25 years hands-on experience.
Can I use a water-fed pole on STEP-G windows?
Yes, purified water via a water-fed pole is one of the safest methods for STEP-G glass. Ensure TDS is at or near zero before use and avoid directing high-pressure water at seals or gaskets.

Field Notes

โ€œIf 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