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How do you measure corner siding?

Published in Siding Measurement 2 mins read

To accurately measure corner siding, you'll need to differentiate between outside and inside corners and measure them accordingly.

Measuring Outside Corner Siding

  • Outside Corner Posts: Measure the vertical length of each outside corner where a corner post will be installed. This provides the total length of the outside corner posts needed.
    • Example: If you have four outside corners, each 10 feet long, you will need a total of 40 feet of outside corner post material.

Measuring Inside Corner Siding

  • Inside Corner Posts: Measure the vertical length of each inside corner where a corner post will be installed. This gives you the total length of the inside corner posts required.

    • Example: If you have two inside corners, each 8 feet long, you will need a total of 16 feet of inside corner post material.
  • J-Channel as an Alternative: If you are not using inside corner posts but plan to use J-channel instead, you will need to measure the length of each inside corner, double this measurement and add it to your total J-Channel requirement.

    • Example: If you have two inside corners, each 8 feet long and you intend to use J-Channel, the calculation would be:
      • 8 feet * 2 = 16 feet per inside corner
      • 16 feet * 2 corners = 32 feet for all corners. You'll need 32 feet of J-Channel.

Summary Table

Corner Type Measurement Method Example
Outside Corners Measure the length of each outside corner Four corners, each 10 feet = 40 feet of outside corner post required
Inside Corners (Posts) Measure the length of each inside corner Two corners, each 8 feet = 16 feet of inside corner post required
Inside Corners (J-Channel) Measure each inside corner length and double it. Two corners, each 8 feet = 32 feet of J-Channel material.

By following these steps and referencing your project needs, you can ensure accurate measurement of corner siding materials.

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