We've learned a lot about windows these past couple of weeks. We started out by pinpointing the location of each window in the house and defining size, position and type. We mainly chose up-down French-style windows.
There is a lot we don't know about windows, so it is hard to make an informed choice. To ensure the best insulation possible, we will get double-glazed glass low-E glass, that is glass that contains a special coating that allows sunlight to pass through, but blocks heat from escaping. Low-E glazing filters out UV rays and reduce condensation on the window by keeping the indoor surface of the glass and frame warmer.
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We looked at YKKAP windows because they make French-style windows. Tostem is another window maker we will look into for a cost/quality comparison. There are several categories of YKK window frames and their performance is summarized in this chart. Basically, the better the frame the less wasted energy. Normally, at Two Style, the recommended window frame is the エイピア Now, about the Bay windows we were hoping to get, we've had to scale down our plans because of building regulations. All the bay windows we had incorporated into the plan on the South Northern wall were converted to standard windows because of the regulations stipulate that there must be a 500mm gap between the house and the border of the land. Our house is situated at 505mm from the border, so if we really wanted to have bay windows on that side of the house, we'd either have to get special permission from our neighbor, or move the house the required amount of mm. Neither option was practical, so we simply dropped the bay windows on that side. This regulation also applies to the 2nd floor and the loft, so we had to eliminate the bay windows in the kids rooms too. What a shame...
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