First, broken bridge aluminum do not blindly follow the trend to buy high-priced 117 series, if your floor is not high, not in the downtown area, with a 108 is enough.
Second, the material of the aluminum alloy window seal should not be selected 1.2 mm thick, 1.2 is too thin, it is likely to be recycled aluminum, to choose primary aluminum, the thickness is at least 1.4 mm.
Third, the current insulation strip on the market is PVC, PA66 and nylon, etc., I recommend that you give priority to PA66.
Fourth, the thickness of the glass national standard is 5 mm, a single piece of glass above 2.5 square meters to choose 6 mm, 4.5 square meters above the selection of 8 mm, and the inside must be filled with argon, which can prevent fogging.
Fifth, hardware must be selected, this money must not be saved. Recommend good Bo, Noto, Lattice House, etc. (see the picture specifically), and finally write the materials, after-sales, handling fees, and demolition fees into the contract, write clearly, so as to avoid being pitted.
