https://interiorpaintingtips.net/multiple-door-installation-strategies/

If you need a door to be installed, it’s likely you’ll either hire an expert or a handyperson. However, there are three proven strategies that you could use to put in your door yourself without having to hire the services of a handyperson or professional door installation.
If you’re planning to install one that is heavy, the best way for you to complete the task is by using the strongest installation technique. The first step is to place one side of the frame into the opening of the door. The part that has been fitted on the frame may be held by screws.
The door can be placed on the appropriate side of the frame. Prior to screwing it into position, you should align your door on the non-fitted side. Utilize shims in opposite directions to ensure that your frame is perfectly aligned.
The most straightforward method of DIY door installation is one that is the most efficient. This is the method of screwing metal brackets inside your door and then screwing it into the wall.
Brad nails are the least expensive method to fix to your door. If you opt for this approach ensure that you leave ample space for your door.
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