Specifying Glass for a Table Top

      tempered or untempered glass? Furniture makers exchange views. June 20, 2005

Question
I have recently been asked by someone to add a protective glass cover on a veneered table top. Does anyone have experience with this? I’m not sure if the glass will cause any problems or not? I have a thought that the lack of air circulation or sweating might be a problem? Any suggestions would be appreciated.

Forum Responses
(Furniture Making Forum)
From contributor P:
I don’t think that putting the glass directly onto the surface will cause any harm. For my money, I'd bet that it would be no different than if you built a 2-piece hutch and put the upper unit base directly on top of a veneered lower unit. The glass will also help to hold the surface flat so there should be no warp or veneer lifting issues. Glass by itself will not cause wood to sweat.

Adding anything between the glass and the surface is a sure way to break the glass. Glass absolutely does not flex - it breaks. Tempered glass explodes into little pieces when it breaks due to flex.



From contributor R:
I would not use tempered glass at all. The only reason you use tempered glass on anything is to protect a person from getting cut by a large piece falling on them.

Tempered glass is too brittle and it will break if someone hits it with a drinking glass too hard or bangs a ring on it. Un-tempered glass will flex, and I would recommend putting felt pads around the edge to support it and keep it off the wood surface.



From contributor W:
I made a 54" diamond 1/4" plate glass top made for a new Teak dining table a while back. This top over the years has acquired numerous small chips around the edge and on the corners of the curved leaves, but they haven’t affected the use or function of it.

I would not temper the glass. If it was tempered, each one of the minor chips may have ended up as a complete crumbling of the glass.



From contributor T:
Laminated glass would ease the safety concerns, but the edge does not have a very nice look to it. I would suggest looking into using plate glass, regardless of the application. You can simply add a clear or tinted film to the bottom or back side, which will hold it together in case of upset.


From contributor H:
I think that most of the reasons for having pads has to do with the glass not sticking to the top, rather than having an air gap. I've actually had something come into the shop where the glass was completely stuck to the finish. I'm guessing either something got on the top, or the sun softened the finish and the glass sunk into it. You can get discoloring under the pads if they're never moved though, so I guess there's no perfect solution.


From contributor J:
For tables the glass could be either tempered or standard glass, as long as the edge of the glass is held back from the edge of the top for sideways impacts. Dropped items shouldn't be a hazard unless the top is not solid across surface. Areas like upper cabinets would need a proper thickness with the possibility of a laminate in-between for shard retention-building facades.

The shape and quantity of clear pads between surface and glass is vital. Wide and thin is my choice. A general rule for perimeters is 1 pad for every 12" and inside area 1 for every 4 square feet. Also, it is of top priority to let the finish cure for at least 1 month before glass is installed.



From contributor S:
I do a lot of built-in desks and work centers, and I like to cover the tops in 1/4' glass. I don't use tempered glass - cost being the main concern, and the lack of need being secondary. The spacers are designed to keep the glass from sliding on the top. I don't use spacers, instead I prefer to recess the glass top, usually with a band of contrasting grain or species.


The comments below were added after this Forum discussion was archived as a Knowledge Base article (add your comment).

Comment from contributor E:
I used quarter inch regular glass and stabilized it with rubber patches (the ones used on bicycle tires). On dark wood this works perfectly.



Would you like to add information to this article?
Interested in writing or submitting an article?
Have a question about this article?


Have you reviewed the related Knowledge Base areas below?
  • KnowledgeBase: Knowledge Base

  • KnowledgeBase: Furniture

  • KnowledgeBase: Furniture: Custom Furniture

  • KnowledgeBase: Furniture: General


    Would you like to add information to this article? ... Click Here

    If you have a question regarding a Knowledge Base article, your best chance at uncovering an answer is to search the entire Knowledge Base for related articles or to post your question at the appropriate WOODWEB Forum. Before posting your message, be sure to
    review our Forum Guidelines.

    Questions entered in the Knowledge Base Article comment form will not generate responses! A list of WOODWEB Forums can be found at WOODWEB's Site Map.

    When you post your question at the Forum, be sure to include references to the Knowledge Base article that inspired your question. The more information you provide with your question, the better your chances are of receiving responses.

    Return to beginning of article.



    Refer a Friend || Read This Important Information || Site Map || Privacy Policy || Site User Agreement

    Letters, questions or comments? E-Mail us and let us know what you think. Be sure to review our Frequently Asked Questions page.

    Contact us to discuss advertising or to report problems with this site.

    To report a problem, send an e-mail to our Webmaster

    Copyright © 1996-2014 - WOODWEB ® Inc.
    All rights reserved. No part of this publication may be reproduced in any manner without permission of the Editor.
    Review WOODWEB's Copyright Policy.

    The editors, writers, and staff at WOODWEB try to promote safe practices. What is safe for one woodworker under certain conditions may not be safe for others in different circumstances. Readers should undertake the use of materials and methods discussed at WOODWEB after considerate evaluation, and at their own risk.

    WOODWEB, Inc.
    335 Bedell Road
    Montrose, PA 18801

    Contact WOODWEB











  • WOODWEB - the leading resource for professional woodworkers


      Home » Knowledge Base » Knowledge Base Article