Expansion Gap For Siding

Allow a 1 8 inch expansion gap between pieces if the siding is air or kiln dried.

Expansion gap for siding.

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. This means that the boards should be touching each other when they are installed. If you are using primed siding you must seal all exposed cuts of siding including those at butt joints. For horizontal applications start with the bottom course and work up with the channels pointing upwards.

Always caulk between the siding and the trim. When installing in freezing weather below 40. If joint moulding option is selected add the thickness of the web to the gap allowing a net 3 16 in. Vinyl siding contracts and expands as the outside temperature changes.

Vertical trim gap caulking. Lap siding can be installed horizontally or vertically. 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. Allow a 1 4 in.

Allow for expansion and contraction. Siding must be cut in lengths to provide for expansion. Gap for expansion wherever siding butts accessories. To avoid structural or aesthetic problems associated with temperature fluctuation take the following steps.

Choose the right nails. Do not nail through overlaps. Allowing for expansion and contraction. Do i need to seal edges at a butt joint.

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. 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. There is no need to leave a gap for expansion.

These will serve as starter strips in which to lock the vertical siding. Increase to 3 8 9 5mm when installing in temperatures below 40 f 4 4 c. And it can move a lot through expansion and contraction especially along the length of the clapboard style panels. Do not caulk between siding and any built in receiving channels located at or around windows.

Hardie boards should be joined in moderate contact. 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. Leave a 1 8 gap between the siding and the trim or other materials to allow for structural movement.