Deadbolt Door Locks

The main access into and out of our property is through either the front, back or side external doors depending on your property but they can also provide an entry point into your property for an intruder. As homeowners, it is desirable to have ease of access through your doors so that it is convenient and quick to go in and out of them. You don’t want to spend five minutes fiddling around with awkward locks. However, this convenience often means a compromise in security thus leaving your external doors vulnerable to attack by an intruder.

So how should we secure our doors to prevent an intruder gaining access? By fitting deadbolt door locks you will improve your security and make it extremely difficult to break in thus making your property safe from intruders.

Traditional standard doorknob door locks are easy to overpower and offer very little protection. Many years ago, it was discovered that normal traditional steel locks could be easily "bumped". For this reason, deadbolt door locks were developed to provide far stronger protection. Although a burglar may break a window to enter a property they can easily exit through a standard doorknob door by simply turning the thumbturn from the inside. A deadbolt lock offers substantially more security and protection from burglars that attempt to break into your property through the doors.

There are three types of deadbolt that are currently available on the market:

Single cylinder deadbolt lock. This has a key cylinder on one side and a knob on the other.
The double cylinder deadbolt lock. With this type both of its sides have a key cylinder and it has no door knob.
The keyless deadbolt lock.

If your home is prone to burglary and you require a high level of security then consider purchasing deadbolts which have two or more cylinders.

Deadlock bolts that are manufactured in the US are generally graded on a scale of Grade 3 to Grade 1, Grade 3 being the least secure. These are gradings based on their ability to withstand an attack and are governed by the American National Standards Institute (ANSI).

Be aware that locks that are imported from other countries may have been not graded at all and other countries probably have different grading schemes, if any at all. They may have not been tested to any recognised standard. If you area at all confused or are in doubt then consult a locksmith professional for advice.

There are minimum requirements for a deadlock to make it properly secure:

Solid bolt that should contain a hardened roll pin to resist sawing.
A solid metal tapered outside housing.
A reinforced strike plate with long enough screws that is fastened to the underlying support framing.
A pin tumbler type locking mechanism.
A 1 inch bolt throw.

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