Posts by Lyle Hill


The Case of Glass Thicknesses

By Lyle Hill

Question: Dear Glass Detective, I am trying to understand at what m/sq point to move from 6.4 mm laminate up to 8.8 mm and so on. The size of the opening for this job is 1,105 mm wide x 2,200 mm high. Its in a 4 sided frame either side of a doorway. floor to […]

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The Case of Scraping Paint Off of Windows

By Lyle Hill

Question: Dear Glass Detective, I have been asked to take paint off of windows. The person said someone already tried and couldn’t do it. The paint has been on for years and the sun hits the windows hard. I know I will have to scrape, but is there a product that I can use and […]

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The Case of Glass Thermal Ratings

By Lyle Hill

Question: What is the thermal rating for laminated glass compared with double glazing? Is double glazing safety glass the same as laminated glass.? Thank you. -Dave H. Papakura, New Zealand Answer: Dave, Thank you for contacting the Glass Detective with your question regarding what you refer to as “glass thermal ratings”. The quick response is […]

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The Case of Laminated Versus Double Glazed Glass

By Lyle Hill

Question: Dear Glass Detective, I am building a retirement home for my husband and I, and have had two quotes – one for laminated glass and the other for double glazed glass, the second one being more expensive. I do not understand the supplier’s explanation of the differences between the two. Could you help me […]

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The Case of the Glass Staircase Railing

By Lyle Hill

Question: Dear Glass Detective, We would like glass to go clear down to our stair landing. We know it needs to be safety glass. If one were to fall down the stairs, into the glass, and break through it, they would fall another 5ft. down to a deck. We assume a guard rail might be […]

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The Case of the Tractor Windshield

By Lyle Hill

Question: Dear Glass Detective, Kubota offers a tempered glass windshield for 2 of their models that have a maximum speed of 25 mph. The model I have is supposed to go 29 mph and Kubota says that’s too fast for the tempered windshield. Their tempered model is $750 and the laminated model is $1200. Does […]

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The Case of the Re-purposed Shower Door

By Lyle Hill

Question: I would like to re-purpose a 1/4″ (6mm) tempered glass shower door as a sloped awning over an entry. The dimensions of the glass are 30″x60″. My question is whether there is a chart available that can tell you what thickness of glass is needed for what loads? There would be a 40″ span, […]

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The Case of the Skylight Replacement

By Lyle Hill

Question: Hi – I am replacing an old bubble type skylight with a curb mount Velux. I have a few tall fir trees around my house and in storms have huge pine cone and some branches come bouncing on the roof. Is it best to get a tempered or laminated glass skylight for best breakage […]

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The Case of the Solvent vs. Carbon Based Urethane

By Lyle Hill

Question: Hi Glass Detective, When choosing between a solvent based urethane and a carbon based urethane, what goes into your factoring? James N. Glendale, AZ Answer: James, Thank you for contacting the Glass Detective with your question regarding the use of urethane products. As you may know, there are a number of urethane products on […]

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The Case of “R Value” vs. “U Value” of Glass

By Lyle Hill

Question:  Glass Detective, Can you tell me how to calculate the “R Value” for a piece of glass based on its “U-Value”? I have an issue with a building inspector in my town based on energy codes, and my wall area must achieve a certain overall “R-Value” for me to get a certificate of occupancy […]

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