York PVC Trim Corners Installation

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Tools and Supplies You'll Need

  1. Hammer
  2. Ruler
  3. Snips or Saw
  4. Square
  5. Chalk Line
  6. Silicone adhesive


Important: Corners should be installed prior to installing siding panels.

Note: These instructions show one type of PVC trim installation. Methods other than the ones shown may be used at the risk of the installer.

Basic Rules for Nailing:

  1. The York vinyl siding corner trim requires 2 feet of J-Channel for every 1 feet of corner.
  2. Position a nail at the top of the slot at the highest nail slot. This will keep the corner from dropping down the wall.
  3. Nail in the center of the slots, every 10 inches in remaining slots down the wall.
  4. Do not nail tightly.
  5. Do not face nail.

Preparing Wall Surfaces:

Vinyl siding corner trim should be installed over plywood, or OSB, that is no less than 7/16 inch thickness. Use water resistant material to flash the corner a minimum of 16 inches on each side. The use of a high quality house wrap is recommended. Fasteners for attaching the corner to framing materials during PVC trim installation should be corrosion-resistant nails with a minimum 3/8 inch-diameter shanks (9.5mm) heads and 1/8 inch-diameter (3.2 mm) smooth shanks. They must be long enough to penetrate a minimum of 1 inch (12.7 mm). Install the nails every 10 inches through the center of the nailing slots. DON'T nail the vinyl siding corner trim tightly or face nail the trim pieces.


1.) Lay out the vinyl siding corner trim needed on a flat, clean surface. Begin your PVC trim installation by interlocking the corners at their overlaps. This is made easier by pulling one of the interlocks open while joining.

Lay out the necessary J-channels. If more than one J-Channel is needed per side, notch the J-Channel and overlap prior to assembly to allow water to run down and away from the wall.

For increased strength, place J-Channel laps near the mid-length of the vinyl siding corner trim. DO NOT position J-Channel laps at the corner overlaps

2.) Prior to installing the J-channel into the corners, apply 1 inch long beads of silicone adhesive into the female sections of the corner at the 5, 7, or 10 inch intervals.

Assemble the vinyl siding corner trim to run entire length of your corner plus any extra as needed for trimming and fitting the upper end to a soffit.

3.) Lock J-channel into each side of the corner piece. Prior to installing the vinyl siding corner trim assembly, make sure to determine the location of the first course of siding.

Once you have determined where the first course is to begin, trim the top portion of the assembly at the correct length of the corner.

Press the corner assembly onto the corner. Position a nail at the top of the slot at the highest nail slot on both sides of the J-Channel. The nail should be placed at the top of the slots to ensure the corner will not slide down the wall.

Fasten the rest of the corner assembly by nailing every 10' in the center of the nail slot and your PVC trim installation is complete.

Important Info...

Be sure to follow and obey all safety rules and recommendations set forth by tool manufacturers.

Always follow any, and all, local, state, and federal building codes. Always comply with any specified clearances set forth by the manufactures of stoves, fireplaces, furnaces, and any other heat sources, as well.