How to Install Stairway Molding

Written by elizabeth knoll
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How to Install Stairway Molding
(Jupiterimages/Pixland/Getty Images)

Trimming out your stairway with moulding is one way you can dress up the appearance of your home. However, if you have attempted this project, you quickly realised how frustrating it can be cutting the mitre angles for the moulding. Rest assured you do not need to master complex geometry skills to measure and cut the stairway moulding. Utilise scrap pieces of moulding to calculate your cut angles.

Skill level:
Moderately Easy

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Things you need

  • Tape measure
  • Pencil
  • Mitre saw
  • Finish nail gun
  • Air compressor

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Instructions

  1. 1

    Place a scrap piece of moulding on the flat stair landing. Trace a line along the top of the moulding with a pencil so that it extends at least 3 inches past where the flat portion of the landing ends.

  2. 2

    Place the scrap piece of moulding on the angled portion of the stair runner. The top of the moulding should intersect the line you drew in the previous step. Trace a new line along the top of the moulding.

  3. 3

    Draw a line from the intersection points of the two lines down to where the flat stair landing meets the angled portion of the stair runner.

  4. 4

    Place a scrap piece of moulding on the flat stair landing. Bring the edge up to where the pencil lines intersect. Mark the location of where the flat stair landing and the angled portion of the stair runner meet on the bottom of the moulding. Draw a straight line between these two points. This will be your cut line.

  5. 5

    Repeat Step 4 to find the other angle, using another piece of scrap moulding.

  6. 6

    Cut each piece of moulding along the line in your mitre saw. Put them into place and ensure the angle is correct.

  7. 7

    Place each scrap piece of moulding on to a regular length piece of moulding and transfer the angles. Cut the new moulding on the scribed lines.

  8. 8

    Position the moulding into place along the stairs and nail into each stud with your nail gun. Use a stud finder to find the location of the studs behind the drywall.

Tips and warnings

  • Always practice on scrap pieces of moulding until you get the angle perfect. This will save money by not wasting long lengths of good moulding.

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