As long as the window frame projects at least 1 inch beyond the sheathing it s possible to install your hardie siding right to the window frame leaving 1 8 clearance from the sides and sill and applying a bead of approved colour matched caulking.
How to install siding around windows and doors.
Measure the distance from the inside top of the j channel to the locking tab of the course below and subtract 1 4.
Gap on each side for expansion.
At the top tuck metal drip cap flashing under the siding and on top of the second layer of wrap.
Cutting and installing the siding 1.
Maneuvering long pieces of vinyl into place can be tricky.
Install the trim just under the drip cap.
When you get to a window you will need to cut sections from the panels directly above and below it to fit.
After the unexpected porch roof project the unexpected entry doorway threshold project.
Cut a piece of flashing out of felt paper and install it at the bottom corners of the windows before you install the side j channels.
Position the siding to be notched below the window.
That one long straight line of trim made the siding install super easy.
And that s how we got our exterior ready for some siding.
Measure from the locking tab of the siding below to the undersill trim to determine the depth of the notch.
Now any water that runs inside the j channels will come out on top of the siding and out the weep holes designed for this purpose.
Install siding around windows.
There s nothing in the james hardie installation instructions that requires any trim at all for installation around windows and doors.
Overlap the flashing onto the row of siding just below the window.
Measure the width of the piece you need to cut by holding the length of siding against the window and marking the edge points on the panel with a pencil.
Apply a bead of caulk to the felt and set the window in the caulk.
Lock the notched.
Place the piece of siding to be installed under the window along the bottom edge and hold it where it will be located.