What is Undersill?

The undersill trim is installed under every window above the ground line. It conceals the top edge of the vinyl siding and is also used at the soffit line. Secures cut siding pieces on top of walls. Installs into J-trim. Provides the perfect finishing touch to your design.
A.

What is J channel for?

J-channel is the most common piece of siding trim. Besides being used for inside corners, it's used for trimming around windows and doors. It is also used where siding meets a soffit or roof at an angle.
  • Do you need house wrap under vinyl siding?

    House wrap is intended to be installed over the sheathing and behind the siding, no matter what siding you are using: brick, vinyl, concrete or any other material used. The house wrap will stop or reduce moisture inside the house and reduce the water condensation or mold problems getting into the studs or wall cavity.
  • How thick should Plywood be for walls?

    The International Residential Code specifies 3/8-inch plywood for sheathing walls with a standard stud spacing of 16 inches, if the siding is nailed to the studs through the sheathing. If the nails penetrate the sheathing, but not the studs, the minimum plywood thickness that the IRC designates is 1/2 inch.
  • What does 32 16 span rating mean?

    The Span Rating on APA RATED SHEATHING panels appears as two numbers separated by a slash, such as 32/16, 48/24, etc.(a) The left-hand number denotes the maximum recommended spacing of supports when the panel is used for roof sheathing with the long dimension or strength axis of the panel across three or more supports.

Updated: 26th November 2019

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