How to Measure and Cut the Wall Opening for a Prehung Internal Door

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Prehung internal doors are a perfect choice for home improvement projects due to their easy installation and attractive design. As part of the installation process, it is important to accurately measure and cut the wall opening in order to ensure that the door fits properly. Here are some steps on how you can do this:

1. Measure the size of your existing door frame and refer to manufacturer’s instructions provided with your pre-hung internal door in order to determine the measurements required for cutting out an adequate wall opening.

2. Draw a line along each edge of the opening using a jigsaw or Speed Square, whichever is most comfortable for use while cutting. This will provide guidance when gently tapping the plaster away from your wooden studs when creating the wall opening.

3. Using a reciprocating saw (with suitable blades marked safe for interior walls), carefully cut through each side of your previously drawn lines from 3/4th inch down from your ceiling marks down until you reach either one side or both side(s) of a stud or joist which has been placed vertically within 4-5 inches from that same side you’re cutting towards.

4. After finishing all four sides, chisel away any remaining notches using heavy chisels, making sure to keep them parallel on all sides so as not to damage any adjacent surfaces at different depths than required by manufacturer specifications, thus reducing risk of any fitting issues between jambs and rough opening later on during installation process.

5. Use plastic decking screws (or equivalent), also according to manufacturer’s specifications provided with pre-hung internal door detailing type and size, as well as exact placement position onto joists surrounding rough opening area -this will help hold framing pieces securely against nearby walls while installing later on during actual installation job work tasks itself due taking additional weight load caused by lock strikes getting added into mix via screws applied this way already in preparation phase prior to even start