In many contemporary homes, the biggest window in the house isn't a window. It's the sliding door that affords a way in to the veranda or deck in the back. Sliding patio doors became trendy in the 1970s, just about the time that double glazing came into popularity as a way of controlling energy costs and heat loss. By using double glazed windows in the door, the utilization of sliding patio doors became an energy conscious choice.

Double glazed patio doors squeezes in a layer of air or inert gas between two layers of glass. The layers are divided by a 'spacer' that holds them from 12-26mm apart, and seals the perimeter between the two to avoid moisture and condensation from compromising the lowered heat conductivity. The use of double glazed windows rather than a single pane of glass can trim down the heat lost through a window by as greatly as 50%.

The classic double glazed patio door comprise of two large double glazed windows hung from a set of rollers in a channel, and laid down into a sliding channel at the bottom. Most of the older ones are framed in aluminum for strength - the size of the windows makes frame strength a main concern. As it comes time to substitute many of the doors that were first installed in the 1970s and 1980s, lots of people are opting to get rid of the channel and sliders in favor of more pleasing French doors.

Replacing shabby patio sliding doors with new double glazed patio doors offers several advantages. First, both the resources and the manufacturing procedure for making double glazed windows have advanced a great deal in the intervening 35 or so years. The new generation of double glazed patio doors is far more of use at insulating your home and reducing heat loss through the glass. The utilization of PVCu in frames makes for far lighter doors than either aluminum or wood, and PVCu has superior insulating properties than aluminum. I have rather vivid recollections of the frost forming along the top and sides of the aluminum frame of our patio doors when I was a young person. PVUc frames make that a thing of the past.

Besides improved framing material, the glass itself has changed significantly. nowadays, you can select low-e glass for your double glazed patio door. The coating on the inside of the glass considerably reduces heat movement between the inside and the outside. The use of a desiccant in the sealing strip spacer between the panes in double glazed windows is another improvement that helps fashion a more durable window. By wholly drying the air between the two panes, manufacturers decreased the possibility of moisture condensing within the window. Finally, by choosing double glazed patio doors that are packed with argon or another inert gas rather than air you lessen the heat conductivity of the windows still further.

If you choose to substitute your old sliding patio door with a new French window, there are some amazing new innovations. Look for folding double glazed patio doors that may be used to change entire walls, French doors with headers and side rails, or French doors with fanlights and mullions that add up to style and elegance to most of some facade.

Quite regularly homeowners mount sturdy locks on their front doors but leave their patio doors and sliding glass windows "wide open" to illegal entry.

Burglars love these because they are so easy to open. Typically, sliding doors and windows are at the side or back of the house so they are more isolated than the front door, this makes an ideal place for burglars to hide and come in.

The regular lock that is fitted to most sliding doors and windows is very simple to force open; an additional stronger lock should be fitted to provide more security. Something as uncomplicated as lying a broomstick in the runner can suggest some protection provided it is a good fit.

Yet, Dead Locks are much superior, they will thwart the burglar from using the door or window to do away with stolen property unless they smash the glass and that is a extremely noisy and risky thing for them to carry out.

Lots of sliding doors and windows can be lifted away of their tracks from the outside. You can avoid this by inserting two metal screws through the track above the sliding part of the door or window; the screw will need to be adjusted to let the door to operate properly.

To fasten a double hung window, you will have to drill a downward inclined hole into the top of the bottom window, and through that into the base of the top window being careful to steer clear of the glass unit, if you have any doubt about your DIY abilities get a professional tradesman to do it. Once the hole is drilled a pin can be inserted, fastening the window shut.

To use the window for ventilation, you should partially open it (less that 4 inches) and make a second set of holes, the window can then be utilized for ventilation.

Keep in mind, open windows and doors, even if safe, should never be left unattended while you are gone or slumbering.