It is not as tough, however, as some other types of glass discussed below. Thermally-tempered glass is made by placing a piece of regular glass in an oven, bringing it almost to the melting point and then chilling it rapidly.
When shattered, the glass breaks into relatively harmless chunks resembling rock salt, free of sharp edges. Fully tempered glass is three to five times stronger than glass that has not been tempered and is five times as resistant to heat.
Once the glass has been tempered, it cannot be cut or processed further. Tempered glass can be any thickness, and almost any type or color glass may be tempered except wired glass or glass with a deep patterned surface. Tempered glass is a logical choice for installation along passageways, in entrance doors and adjacent panels.
Building codes in many jurisdictions now require this type of glass in areas or locations where individuals are likely to bump into it. Laminated glass is well-suited for installation in street-level windows or displays, doorways, and other access areas where security is necessary.
It is composed of two sheets of ordinary glass bonded to an intervening layer or layers of resilient plastic material, typically PVB polyvinylbutyral. When laminated glass is broken, it may crack and break, but the pieces of glass tend to adhere to the plastic material.
If a hole is produced, the edges are likely to be jagged, as with ordinary glass. Laminated glass helps protect against the "smash and grab" criminal. A criminal who encounters this type of glass cannot simply hammer his way through it within a few seconds and will be inclined to move to an easier target.
However, given enough time, a burglar will be able to defeat laminated glass. For extreme situations where you need serious protection, you can install bullet-resistant glass.
However, the cost is high as this is one of the most expensive window protective measures available. The thicker the glass, the more protection. The various thicknesses can be certified under Underwriters Laboratories, Inc. Plastic glazing material can be divided into two general categories - acrylic and polycarbonate. Both are available in a variety of patterns and in a wide range of transparent, translucent, and opaque tints, as well as in clear form.
Acrylic is more transparent than polycarbonate, while polycarbonate possesses outstanding strength against impact. Due to the way acrylic and polycarbonate expand and contract in changing temperatures, both must be installed by a professional. Both are prone to scratching , so exercise extreme care when cleaning these surfaces. It is available in varying thicknesses and it has much more impact resistance than double-strength window glass.
It is not only safer than glass due to its breakage resistance but, when it is broken, it does not shatter into small slivers with sharp edges, but breaks into comparatively large, dull-edged pieces.
Polycarbonate is almost unbreakable. It has times the impact resistance of glass and 20 to 30 times the impact strength of acrylic. It is expensive -- about four times the price of standard glass.
But if your property is repeatedly being vandalized or broken into, it may well be worth the additional cost. Source: wisegeek. Polycarbonate is an ideal choice for small windows like those found in doors. Polycarbonate should be professionally installed. If you hit it with a sledge hammer it probably won't break, but if it's not installed properly, the whole window is likely to get knocked right out of the window frame. It has a slight blue or gray tint, and so it is less clear than other types of glazing and shows some distortion.
This type of material is reported to be less weather resistant than glass or acrylic, but can be expected to remain serviceable and attractive for seven years or more in outside installations.
Check your local fire code before installing polycarbonate in your bedroom windows to be sure you are not in violation. While there are many steps you can take to reinforce your windows and keep them well-protected from intruders, the methods above are primarily delay tactics to buy time for police to arrive.
Self-installed home security is great when you're on a budget but you or a family member has a few spare minutes during the day to get it set up. Alternatively, you can opt for a professional installation if you have a complex system with many components which will take longer to install. Contact a reputable alarm company for more information on what kind of security system is most suitable for your home and lifestyle.
To learn more about home security, check out our Ultimate Guide to Home Security. We are located about 10 minutes walk from Park St Station. You can buy a long strip and cut it yourself or buy the precut version in a package. Measure the top sash of your window. If you want your window to always be "locked" in place measure the entire sash. If you want to be able to open your window a safe distance subtract 5 inches or whatever opening size you choose from the total measurement of the upper sash.
Place the soft pieces on the top sash. Place one on the top of the left side of the sash running vertically, the other piece on the bottom, or 5 inches from the bottom to match the velcro on the locking board. Hold the piece of board up to the sash to help you place the velcro correctly. If you feel that this will not be secure enough, you could place velcro along the entire piece of locking board, or even use the stronger types of velcro.
I think it would take some force for an intruder to displace the boar. Window security film can be applied to the surface of your windows for an additional layer of protection. While the film will not prevent your windows from breaking completely, it will help hold the glass together, making it incredibly difficult for someone to gain access to the window lock from the outside.
You can hire a professional to install this film or tackle the job yourself. Investing in a monitored alarm system with glass break sensors is also a smart choice for many homeowners. A system like this will warn you if and when the glass breaks, then notify the security company or local police to respond to the incident. The second point of vulnerability on your double hung windows is the lock itself. Many windows come with light-duty locks that are easy to jostle and break.
A simple pry with a crowbar can break most window locks and allow someone to easily enter your home. Additionally, you can drill window pins through the inner window frame to your outer window frame.
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