Sash windows are attractive features of many homes. The word “sash” means a frame or panel holding the glass of a window or door. As such, it might be a term used to describe parts of most types of windows and doors. But over the years it has come to be used more or less exclusively for widows that are open and shut by sliding the glass panels.
The panels slide vertically in the vast majority of cases. Though it is rare, nonetheless it is possible to encounter an arrangement where they slide horizontally. Each panels is seated in its own groove which is the full height window frame height. This is what enables to two to slide independently of each other. It is what allows them to slide to any position on the length of the frame, even to overlap each other.
It is not unheard of to have these windows with just a large single pane of glass filling each panel. Usually, however, each sash is divided into an equal number of small panes of glass. These are called “lights”. These lights are held separated from each other by thin strips of wood called muntin bars which are fixed to the bigger frame.
Each panel is made up of side rails called styles style and top and bottom rails. The top rail on the bottom panel and the bottom rail on the top panel, which sit flush with each other when the window is closed, are thus called “meeting rails”.
A crucial aspect of most traditional sash windows is the “box”. This is where the term “box windows” comes from. On both sides hidden inside the window frame, there are hollow areas roughly the same height as the window itself. Inside this box section are weights. These are usually made of steel or lead. The weights are there to make it easy and safe to lift the heavy panels for opening. Big windows would be impossible to lift without such counter weights.
Each panel has its own two counter weights. There is a cord called a sash cord attached to the panel’s hidden sides. This cord passes up the side window frame’s grooves and over a recessed pulley at the top. It then comes down inside the box section where it is attached to the weight. These weights together are nearly the same weight as the frame, so that with them attached, lifting is no longer a problem. They even allow the frame to remain at whatever height the owner wishes, with no risk of it falling down.
For all their ingenuity, these windows are susceptible to unique problems. If they are not painted very carefully, they have a tendency to stick or jam. If they are not fitted correctly they can allow significant drafts into the house. Related to that they tend to rattle in strong winds. All these issue can be put right by a trained window fitter. There are many effective draft proofing systems now available specifically designed for these types of windows. The same systems solve the rattling problem simultaneously.
For many people any irritations with rattling or draughts are relatively minor. They are minor compared to the pleasure of having possibly the most aesthetically pleasing windows available. Sash windows are indeed visually appealing, provided they are installed in a building that compliments their design.
Sash window restoration London area gives new life to your worn and old windows. A sash window company has the knowledge to better the look and operation of the windows in your home or business.
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