Everything you need to know about finding a double hung window installer
This variation of the sliding window style uses a block and tackle balance system or a sash system. Double hung windows are sometimes called ‘sash windows’ and even ‘hung sash windows’ but they all work moving the top and bottom window moving at the same time until the optimum breeze is achieved. Hot air escapes above the top window while cool air enters through the bottom gap, causing a cooling system that is very efficient during the hot months. Double hung windows help to insulate your home windows and reduce the cost of cooling and heating your home.
There are two variations to the double hung window:
Top and bottom opening: Where the windows one movement slides both windows at the same time using the block and tackle system. The sash window is opened one at a time by pushing the top window down and lifting the bottom window up to the desired level. Both varieties are fastened shut by a cam catch which locks tighter as it closes.
Bottom opening only: Where the top window is fixed and the bottom window is pushed upwards over the top window, usually on the inside.
Sourcing Double Hung Windows
Because double hung windows are not as common as sliding windows, they are not as widely available, so they will most likely need to be sourced at a specialist door and window supplier. In many instances they are built to specification by tradespeople to fit a particular new or renovated home.
Double Hung Window Installation
Due to the complicated mechanisms in these windows it is recommended that double hung windows be installed by a professional. The sash windows for example, need to be aligned carefully to ensure that they open evenly and of course that they are sealed against the weather and don’t rattle.
Maintaining Double Hung Windows
There is a possibility that you may not know that you even have double hung windows in your home. This is because in older homes the casings may have become stuck or the mechanism jammed. Sometimes when they are re-painted or varnished, they stick together and become inoperable. After some time it seems as if they never moved before. This can affect the top or bottom opening window and if forced the wooden casing or delicate mechanisms can be broken or damaged.
An experienced window installer or good tradesperson will be able to remedy this. Double glazing can also be retro-fitted to double hung windows, and so can tinting. Of course regular maintenance will ensure that the seals help to keep the cold weather and excess wind out.
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