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Green Building Bible, Fourth Edition
Green Building Bible, fourth edition (both books)
These two books are the perfect starting place to help you get to grips with one of the most vitally important aspects of our society - our homes and living environment.

PLEASE NOTE: A download link for Volume 1 will be sent to you by email and Volume 2 will be sent to you by post as a book.

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    • CommentAuthorRex
    • CommentTimeFeb 5th 2020
    What ho one and all,

    I am asking this on behalf of my wife, because I know the answer and she does not believe me!!!!

    We have a couple of roof windows, generally south (ish) facing and during the summer, they do heat the room somewhat. She is keen for me to apply some self-adhesive film to reduce the light, and particularly UV, transmission. I have done so on some of the regular vertical windows and frankly, I do not think it makes much difference.

    However, the roof lights mean working up-side down, or removing them.

    So her idea is to paint some kind of whatever on the outside and that I should ask on this forum. So being the dutiful husband, I am asking!!!!

    Is there such a thing as external glass paint? Surely it would not survive weathering and dirt? If it exists, is it cleanable?

    Personally, my plan would be to remove them from the inside, fit the film with them on the floor and replace. The only major issue is getting them back whilst gravity is against me. But they are not so big so don't assume that 2g and a wooden frame can be so heavy.

    Grateful for any thoughts regarding the paint, and hopefully, they consensus is it's a stupid idea.

    Paint the inside with white paint in situ - Think mirrors, the reflective component is on the back and they still work (you can get surface silvered mirrors but they are silly money and delicate)

    Re paint - oil based will probably stick better, water based emulsion would be easier to scrape off if you later change your mind
    • CommentAuthorgyrogear
    • CommentTimeFeb 5th 2020 edited
    we use these, they are great, made of blue paper (inside décor) and white paper (solar side):
    they were included "free" when we got the new windows.
    so no idea of how much we actually *paid* for them (-:


    "the blind (IS) provided with guide wires at the sides to hold IT against the glass __ ideal if a particular fabric is required or a more traditional look is to be achieved. Tensioned pleated blinds are often the best solution for small to medium sized projects"

    we have two roof lights, each 2.8 m wide by 1.2 m high.
    basically 8 square meters...
    (= our central heating !).

    Blinds are tensioned on guide wires, and can be stopped at any height.
    Can get the window cleaning vac in between the guide wires easy; or else can unclip the bottom adjustable tensioner bar, then the blind (incl. the wires...) can just hang free, vertically, or be pulled aside for cleaning.
    I clean them twice a year with the vacuum cleaner.

    The internal box cavity is about 12 mm.
    They keep the glare out in summer, and on winter nights they sure do keep the heat in...

    For S.A.P. they come with a draw-pole that is stowed in a wall clip.

    OK, a purist will say that the solar gain still makes it through the glass, but the blind keeps the hottest air next to the glass, and as far as we are concerned, the room does not suffer.

    If I may come straight to the paint, forget the film etc.

      blind blake.jpg
    • CommentTimeFeb 5th 2020
    Not quite sure what yours are GG. The website offers various types.

    We have pleated blinds on some of our tilt-and-turn windows. We like them, and they will happily work on roof windows as well.
    • CommentAuthorgyrogear
    • CommentTimeFeb 6th 2020
    Mine look more like these:


    "pretensioned honeycombe roof blinds"

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