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Thread: Glass Issues An Employee Guide

  1. #1

    Default Glass Issues An Employee Guide

    Weve all heard it before, window cleaning isnt rocket science! While that is true its not as simple as it once was. We can run into issues like hard water stains, fabrication debris, tin etch haze, low-e coating reactions, and other things that require us to be educated on a variety of techniques and tools. To further complicate matters what if we happen to be an employee and we have to explain these potential issues to a client? Lets discuss a few issues from the employees perspective.

    Forewarned is forearmed

    An old adage comes to mind to be forewarned is to be forearmed. In other words if we are prepared for the potential problems we can be prepared to deal with them. This means that we need our employer to have procedures in place that we can start with so each issue is dealt with consistently.
    But for simplicity here are some basics that will allow an employee to give a simple explanation about how to deal with them, depends upon your companies policies

    Fabrication Debris
    annealed glass must go through a heating and cooling process to become tempered. It is cut to size before this process and if not cleaned properly it can become contaminated with glass fines (as well as other particulates from the factory) which can become fused to the surface during the heating process. When doing a standard cleaning using a razor, the defects can be moved across the glass surface causing scratches. The options here are 1) a signed waiver explaining that identifying the defect isnt possible and clean as usual, 2) not using a razor and trying to use white pads, 3) cleaning only the loose debris off the glass, or 4) using heavy chemicals to remove stubborn debris (this option can void the insulated glass unit warranty).

    Tin Etch Haze
    architectural glass today is called float glass which means the liquid glass comes out of the oven, floating on a layer of molten tin. For the life of the glass it will have a thin layer of tin embedded in one side. When removing hard water stains from that side, if a hydrofluoric acid solution is used it will react with the tin and cause an odd colored haze. There are ways to test for the tin side but if the stain is on that side there are two options replacement or mechanical removal of the stain with a scratch removal system.

    Hard Water Stains
    beyond regular debris on the glass, you can run into stains from different minerals on the glass. Each stain is different and takes different chemicals or techniques to remove and is no longer cleaning, but restoring the glass. Depending on the stain you can use 1) bronze (steel) wool, white pad and/or chemicals, 2) a polisher and chemicals, or 3) a scratch removal system for more severe stains.

    Low-E coating reactions
    in order to increase the energy efficiency of a window a metallic sputter coating (called low-e) is applied on one interior surface of an insulated glass unit. Sometimes the coating reacts in spots to different contaminants. It will show up as a rainbow colored haze that you cant touch with your finger (because its in between the glass panes). The only option here is replacement of the affected unit.

    Blown IG seals
    when you see fogging or white river like stains between the glass you have a blown seal in the insulated glass unit. If its just fogging you can, in some instances, have the moisture removed in a defogging process (usually you need to specialize in this service or know of a company in your area that does). If the fogging has turned into staining on the interior then replacement is the only option.

    Preexisting Scratches
    when doing a new job you can find yourself being blamed for scratching a window when it was done by someone else and usually at a different time. Here a waiver that covers preexisting scratches and/or a thorough walkthrough identifying and taking note of preexisting conditions are your only real protection.

    Before discussing any of these situations with a client, make sure you are authorized to do so by your employer or direct the client to the person who is.
    Tony Evans
    A New View Exterior Cleaning
    UAMCC President
    319-325-9475 Call or Text

  • #2

    Default Re: Glass Issues An Employee Guide

    Nice post Tony well written
    Andrew Snyder
    Agent Clean of the Quad Cities
    563-447-3402 office

  • #3

    Default Re: Glass Issues An Employee Guide

    Thanks Andrew
    Tony Evans
    A New View Exterior Cleaning
    UAMCC President
    319-325-9475 Call or Text

  • #4

    Default Re: Glass Issues An Employee Guide

    Is your actual liability reduced if you only use wfp, white pad, bronze wool? (i.e. no scrapers and no chems). I know its safer but would you have a legal advantage if you get blamed for pre-existing damage, but failed to identify it beforehand?
    Serving Ames Ankeny Des Moines Iowa
    Roof and Siding Soft-washing, Wood Restoration and commercial building and flatwork services.

  • #5

    Default Re: Glass Issues An Employee Guide

    If you can prove that you didn't have a scraper on the premises at all or chems that could damage the seals then you would have a better chance.
    But remember a wfp isn't a good fit for every window. If you can be particular on the windows you clean then you can control that factor.
    With all the variables we run into I find a waiver a safer way to work.
    Tony Evans
    A New View Exterior Cleaning
    UAMCC President
    319-325-9475 Call or Text

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