Expansion Gap For Siding

These will serve as starter strips in which to lock the vertical siding.

Expansion gap for siding.

Allow a 1 4 in. If the panels are 20 feet 6 1 meters or longer refer to the manufacturer s instructions for how to increase the gap. If you are using primed siding you must seal all exposed cuts of siding including those at butt joints. Siding must be cut in lengths to provide for expansion.

To avoid structural or aesthetic problems associated with temperature fluctuation take the following steps. Choose the right nails. Allow for expansion and contraction. Vinyl siding contracts and expands as the outside temperature changes.

And it can move a lot through expansion and contraction especially along the length of the clapboard style panels. Leave 6 4mm gap at the top and bottom. Always caulk between the siding and the trim. Do not caulk between siding and any built in receiving channels located at or around windows.

Do not nail through overlaps. To compensate for this movement adjacent siding panels are overlapped so that they can slide sideways past each other without buckling or creating gaps see nailing details and expansion gaps. Increase to 3 8 9 5mm when installing in temperatures below 40 f 4 4 c. James hardie recommends that a slip sheet joint flashing is installed behind each butt joint in the siding.

Leave a 1 8 gap between the siding and the trim or other materials to allow for structural movement. For horizontal applications start with the bottom course and work up with the channels pointing upwards. Gap for expansion wherever siding butts accessories. Do i need to seal edges at a butt joint.

Lap siding can be installed horizontally or vertically. Hardie boards should be joined in moderate contact. Allow a 1 8 inch expansion gap between pieces if the siding is air or kiln dried. Vertical trim gap caulking.

Allowing for expansion and contraction. For siding up to 6 inches wide use one nail one inch up from the lap. Vinyl siding must be nailed so expansion and contraction are not restricted. If joint moulding option is selected add the thickness of the web to the gap allowing a net 3 16 in.

Allowance should be made for expansion and contraction by leaving a 1 4 6 4mm gap between the siding and all corner posts and channels. There is no need to leave a gap for expansion. When installing in freezing weather below 40.