House Works: Your questions on insulating a garage door, weed-free flagstones

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    House Works: Your questions on insulating a garage door, weed-free flagstones

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    Author of the article:

    Steve Maxwell

    Publishing date:

    Oct 16, 2018  •  October 16, 2018  •  3 minute read  •  Join the conversation Moss growing between paving bricks is one good way to keep ants and weeds from setting up shop. Moss grows even in full sun locations when few nutrients are present. Photo by Steve Maxwell /Postmedia

    Reviews and recommendations are unbiased and products are independently selected. Postmedia may earn an affiliate commission from purchases made through links on this page.

    Article content

    Insulating a garage door

    Q: How can I add insulation to my garage door? I’m thinking of gluing pieces of 1/2” foam to the outside, followed by 3/8”-thick V-groove boards on top, finished with marine varnish over dark brown stain. Will this work?

    A: This could look good at first, but I can see a couple of problems with your plan. One is the thickness of wood. They don’t make V-groove boards as thin as 3/8 inch and if they did there would be quite a bit of warping over time because of exposure on one side only.

    A bigger problem is water getting behind the wood and foam. It’s almost certain to happen, and if even a little moisture got behind things it would cause a lot of warping and possibly delamination.

    If your door is smooth and relatively free of hardware on the inside face (my garage door is), then applying rigid insulation on the inside would be your best bet. You…


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