Deadbolt Installation in Coatesville, PA

Your front door in Coatesville may have a knob lock but no separate deadbolt.

The latch holds the door shut, while a deadbolt adds another locking point that extends into the frame. We install single and double cylinder models on entry doors, positioning the strike plate and the opening behind it so the bolt has room to extend fully. If you would prefer to use one key for the new lock and your other locks, we can check whether they are compatible for matching keys.

With a single cylinder, you use a key outside and a thumb turn on the interior side. A double cylinder requires a key at either side of the door. For a Coatesville door with nearby glass, that distinction matters: broken glass could give someone access to the interior control. The tradeoff is that a double cylinder also requires an accessible key to unlock the door from inside, including during an emergency. Your choice should account for both the glass and how you need to get out.

If your back door feels weak because it has only a knob lock, we first look at its condition and the surrounding frame to see where a deadbolt can fit.

We also check how the entry closes, since its position affects where the strike needs to sit. Before installation, we explain the options and what each requires. A single cylinder operates with a key outside and a thumb turn inside. A double cylinder requires one on both sides, with no thumb turn near glass.

An entry that must serve as an exit needs to open from inside without a key. For other entries, a double cylinder may be an option, but leaving a key in or within reach of the inside lock could still allow someone to unlock it through broken glass. We also check whether the new lock can be keyed to match your existing locks. After installation, we check the result with you, making sure the bolt turns freely and extends fully into the frame when the entry is closed.

With the garage or basement door open, test the lock using the key and, if fitted, the thumbturn.

Check it again with the door closed, keeping a key with you. The bolt should extend fully without force. For a double cylinder lock, keep a key accessible from inside, but out of reach through nearby glass.

Dirt and moisture can make a lock harder to use, so wipe its visible surfaces with a soft, dry cloth. If the key becomes stiff, use a lubricant recommended by the lock manufacturer and follow the label directions. Do not force a sticking key. Changes in the door's alignment can make the lock rub against the strike. If turning becomes difficult or the bolt will not extend fully, call us to check what is causing the problem.