Lay a towel on the floor in the doorway to protect the floor from damage.
To avoid messing up the paint on the wall, be sure to make clean cuts that penetrate all the way through the caulking.
If you’re going to reuse the old trim, be careful not to damage it.
You can also slide a reciprocating saw between the frame and wall, using it to cut off the nails holding the frame in place.
The length of wood you need for the sill depends on the width of your door. Use a tape measure to figure out the dimensions.
It’s also possible to sand down the siding in the doorway to create the extra space.
If the gap between the door jamb and rough opening is large, you can use a putty knife to push fiberglass insulation into the space. Be sure to wear gloves, goggles, and a mask to protect yourself from the insulation.
A 16d nail means a 16-penny nail. It’s an old way of indicating the nail’s length. Most nails are labeled with both a penny measurement and standard measurement.
Read the manufacturer’s instructions to find out how long you need to wait for the foam to dry.
Depending on the thickness of your trim, you may need larger nails than this.
After the caulk solidifies, your new door is set and you can customize the parts by staining or painting them as you please.
