Expansion Gap For Siding

Choose the right nails.

Expansion gap for siding.

And it can move a lot through expansion and contraction especially along the length of the clapboard style panels. If the panels are 20 feet 6 1 meters or longer refer to the manufacturer s instructions for how to increase the gap. There is no need to leave a gap for expansion. By having the small additional overlapped piece of siding you are still allowing for expansion but you are effectively covering all the gaps in the siding.

Leave a 1 8 gap between the siding and the trim or other materials to allow for structural movement. Do not nail through overlaps. If you are using primed siding you must seal all exposed cuts of siding including those at butt joints. Increase to 3 8 9 5mm when installing in temperatures below 40 f 4 4 c.

For siding up to 6 inches wide use one nail one inch up from the lap. Allowing for expansion and contraction. To avoid structural or aesthetic problems associated with temperature fluctuation take the following steps. This means that the boards should be touching each other when they are installed.

When installing in freezing weather below 40. Siding must be cut in lengths to provide for expansion. By obtaining some additional siding and carefully preparing it small pieces can simply be snapped into place covering the wide gap your home builder is forced to leave for expansion. Gap for expansion wherever siding butts accessories.

Always caulk between the siding and the trim. These will serve as starter strips in which to lock the vertical siding. Allow for expansion and contraction. Allow a 1 8 inch expansion gap between pieces if the siding is air or kiln dried.

Lap siding can be installed horizontally or vertically. James hardie recommends that a slip sheet joint flashing is installed behind each butt joint in the siding. Do i need to seal edges at a butt joint. Do not caulk between siding and any built in receiving channels located at or around windows.

Vinyl siding contracts and expands as the outside temperature changes. If joint moulding option is selected add the thickness of the web to the gap allowing a net 3 16 in. Vinyl siding must be nailed so expansion and contraction are not restricted. Leave 6 4mm gap at the top and bottom.

Vertical trim gap caulking. 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. Hardie boards should be joined in moderate contact.