Double Hung Windows

70mm Aluminium Sliding Window 70mm uPVC Sliding Window Feature two sashes which move up and down. When both sashes are closed, they are positioned one above the other, and when the window is opened the sashes overlap, creating an opening at the top and bottom. Double hung windows usually feature hidden cords or counterweights which […]

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Double Hung Windows

70mm Aluminium Sliding Window
70mm uPVC Sliding Window

Feature two sashes which move up and down. When both sashes are closed, they are positioned one above the other, and when the window is opened the sashes overlap, creating an opening at the top and bottom. Double hung windows usually feature hidden cords or counterweights which hold the sashes in place and prevent the windows from opening or closing on their own. Due to their nature, double hung windows can open to a maximum of 50% of the total window size, however, give the advantage of promoting airflow, by allowing hot air to escape via the top gap while cold air enters via the bottom.

Advantages of double hung Windows:
– promotes airflow – fly screen friendly – easy to clean uPVC/aluminium 2mm sliding panels double glazed, Clear Glass or colonial design, U-value (rate of heat conduction) 1.9W/m2.K from, 4. R-value (heat loss) 0.48, SHGC-0.55, Rw (CTR) 35 -1; -3, Glass 5mm+9A+5mm, argon gas in the gap, with toughed glass and thermal break.