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Add an interior wall

  • Difficulty: hammer
    Close Difficulty
    Beginner Do-It-Yourselfer - Easy
    Intermediate Do-It-Yourselfer - Moderate
    Experienced Do-It-Yourselfer - Difficult
    Professional - Expert
  • Completion Time : 1 day

The addition of an interior non-load bearing wall is a simple, affordable project that allows for the creation or division of rooms anywhere in the home. This can add style and wall storage to the home while providing additional control over heat and air conditioning.

The process for the building of the wall depends on whether the home is older or under construction. In new construction, walls are built on the ground before being erected into place because the ceiling has yet to be installed. In a renovation project, it is recommended that new walls be built in place. This is the topic of this guide.


Tools and materials required


  • Carpenter’s pencil
  • Chalk line
  • Concrete nailer (for concrete floors)
  • Electronic stud finder
  • Framing square
  • Hammer
  • Handsaw or circular saw
  • Level
  • Plumb bob
  • Drill with screw attachments
  • Masonry drill bit (generally included in the masonry screws' packaging)
  • Tape measure


  • Ardox nails - 3 ¼"
  • Concrete screws - 3"
  • Construction adhesive (for concrete floors)
  • Kiln dried lumber (S-dry) wall studs ( 2" × 4" × 8" or 2" × 3" × 8"
  • Wood screws - 3 ¼"
  • Stud-framing clips 

Before Assembly

Find the location of the wall studs and mark floor lines


The location of the new wall depends in part on the alignment of the ceiling joists. If the joists are perpendicular to the line of the new wall, you can install it almost anywhere, preferably against a stud in the existing wall (the wall into which the new wall will be anchored).

However, if the ceiling joists are parallel to the line of the new wall, it will be fastened to a single joist only. In this case, the location of the new wall will be determined by the joist nearest to the intended location.

Floor Attachment

As most floors are typically solid enough to serve as anchors, the floor joists are not as important, but if you are able to fasten the wall into the floor joists using screws or nails, it would be even better.

To attach the sole (bottom) plate to a concrete floor use construction adhesive before nailing it with a concrete nailer. Another popular method is to pre-drill the concrete (prior to applying the adhesive) to a depth of 1" before fastening the sole plate in place using masonry screws.

Stud Placement

The distance between the studs at the end of the wall will probably be much less than 16". It is recommended that they be separated by a minimum of 8" and a maximum of 16", centre to centre.

Nail or screw all the cross-studs horizontally in order to produce a straight line and not a staggered line (one cross-stud placed high, the next low, the next high, etc.). A straight line of cross-studs will facilitate drywall installation. Screws or nails will have to be fastened at an angle.



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Helpful Information

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Add an interior wall