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North America Β· Holding Company

Ply Gem Industries β€” Window Cleaning Guide

πŸ‡ΊπŸ‡Έ USA Β· Last reviewed by Justin Orloff

ply-gem windows

Ply Gem window systems

Quick Facts

founded

1943

hq

Cary, North Carolina

primaryMaterials

Vinyl (uPVC) across all window brands in the group

glazingPartner

In-house and third-party (varies by brand)

marketTier

Entry to Mid-Range across the portfolio

Brand at a Glance

  • Country: USA
  • Corporate name: Cornerstone Building Brands (formerly Ply Gem)
  • Founded: 1943
  • Window brands in group: Simonton, Great Lakes Window, Atrium Windows
  • Other products: Vinyl siding, roofing, gutters, trim
  • Scale: One of the largest exterior building products groups in North America
  • Climate context: USA national - brands cover all US climate zones

Product Range

  • Simonton Windows
  • Great Lakes Window
  • Atrium Windows
  • Exterior building products

Why This System

The group model means a professional who understands one Ply Gem vinyl window brand largely understands the others. Common manufacturing standards and shared engineering result in consistent cleaning requirements across Simonton, Great Lakes, and Atrium. Ply Gem exterior products - siding, trim, gutters - appear on properties alongside Ply Gem windows. Be aware of chemistry compatibility when cleaning both windows and exterior products on the same visit. At the group level, Ply Gem represents the volume mid-market of US vinyl window manufacturing. These brands collectively cover a very large proportion of USA new construction and replacement residential windows.

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 Ply Gem Industries windows to a professional standard β€” 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 Ply Gem Industries 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 Ply Gem 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 Ply Gem 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 Ply Gem 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

  • When quoting new construction developments built with Ply Gem group windows and siding, price the whole exterior envelope rather than windows alone - the group product presence makes it natural to position for everything.
  • Simonton, Great Lakes, and Atrium screens are manufactured to similar specifications and are often interchangeable within a product tier. If a screen is missing or damaged on a Great Lakes window, the Simonton replacement may fit.

What NOT To Do

  • Do not use solvent, abrasive, or alkaline products on any Ply Gem group vinyl window
  • Do not allow siding or exterior cleaning chemicals to migrate onto window frames
  • Do not exceed 3% bleach concentration for mildew treatment
  • Do not neglect weep hole maintenance across any brand in the group

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 β†’
Orloffs Squeegee Pro Pack bundled

Cleaning Frequency

Clean every 4–8 weeks depending on environment.

Frequently Asked Questions

How often should I clean Ply Gem Industries windows?
For Ply Gem Industries 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 Ply Gem Industries windows?
Professional cleaning of Ply Gem Industries 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 Ply Gem Industries windows?
Do not use solvent, abrasive, or alkaline products on any Ply Gem group vinyl window
Does Ply Gem Industries publish an official cleaning guide?
Ply Gem Industries 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 Ply Gem Industries windows?
Yes, purified water via a water-fed pole is one of the safest methods for Ply Gem Industries glass. Ensure TDS is at or near zero before use and avoid directing high-pressure water at seals or gaskets.

Field Notes

β€œKnowing the Ply Gem parent relationship means that Simonton, Great Lakes, and Atrium expertise transfers between brands. A cleaner confident on Simonton can approach Great Lakes and Atrium with the same protocol. Properties with Ply Gem windows often have Ply Gem or Cornerstone vinyl siding. Offer a whole-exterior maintenance service - the chemistry compatibility across the product family simplifies the approach.”

Justin Orloff