Double Hung Windows
Double hung windows are definitely the classic timber window. When used to good effect, double hung windows are by far the most stylish in design, and operation. Period homes in particular, but also new homes where a cottage, country, or bungalow is the look you are trying to achieve, then the double hung stands alone as the first option. While being an aesthetically pleasing window, it is also very practical. Both sashes slide up and down, never needing to project inside the room or outside. The double hung takes advantage of the general air movements in a room and when used propery (top and bottom sash open) air is allowed to circulate due to natural convection of rising warm air. There are quite a few different methods in which this type of window operates, each have there own specific advantages and disadvantages.
Firstly the is the
Spiral balance method. Spiral balances have been used in the production of double hung windows for decades. They are usually black or grey tubes that are twisted to act as a counter weight to the sash they are screwed to. The balances themselves are not a wonder of modern technology, but they are effective, and while the balance itself can wear from constant use, they are relatively easy and cheap to replace. Spiral balances can be hidden behind timber pockets if desired. Anti- rattle devices are installed to this system to try and stop the customary rattle caused by the wind.The next type is the
Jambliner system. This is a European based product where it is extensively used. Basically it is a plastic insert that is fixed into a timber window frame. They are a convenient whrere sashes can be easily removed for cleaning or tilt into the room to clean the outside which is particularly handy for second storey windows that are not easily accessible from outside. The down side is the fact that they have the plastic insert which comes in grey, grey and …………………GREY!. But if suits your colour scheme, it is a solid option.Our own window system developed at mouldright is the
Counter balanced system. This system basically uses stainless steel wire over bearing roller and counter weights one sash against the other. This means that the system has very few moving parts, is gravity based and has anti rattle devices fitted to sashes. The disadvantage of this system is during painting, as long as care is taken with sticking sashes that the wire is not damaged then the system is excellent. We find that almost all owner builders very rarely have this trouble, it’s the trade painters usually who don’t take the time.
Last but not least (literally) is the
Weights and cords double hung. Still after all the years of development, no other system offers you a smoother, trouble free operation as a weight and cord arrangement. Now a day cord manufacture using synthetics means cords replaced today will definitely outlast those who put them in. Brass rollers add a finishing touch to what is the rolls Royce of the window world. The only draw back to the double hung would be the price, but if you can appreciate quality then it is certainly the best available.