Expansion Gap For Siding

For siding up to 6 inches wide use one nail one inch up from the lap.

Expansion gap for siding.

Allow for expansion and contraction. Always caulk between the siding and the trim. Create a proper 3 16 space at minimum between the two pieces of siding. If the panels are 20 feet 6 1 meters or longer refer to the manufacturer s instructions for how to increase the gap.

Choose the right nails. Use a keyhole or reciprocating saw with a fine tooth blade to remove enough material from one of the pieces of lap siding. Do not nail through overlaps. Gap for expansion wherever siding butts accessories.

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. Siding must be cut in lengths to provide for expansion. Remove any sawdust dirt or debris from the gap to prep it for finishing. As a result the expansion gap between the top of the tongue and bottom of the groove can range from o to 1 8.

Increase to 3 8 9 5mm when installing in temperatures below 40 f 4 4 c. Allow a 1 8 inch expansion gap between pieces if the siding is air or kiln dried. An improper expansion gap may have similar consequences to the results shown above especially if the milling process is irregular. Leave a 1 8 gap between the siding and the trim or other materials to allow for structural movement.

When installing in freezing weather below 40. Vertical trim gap caulking. Allow a 1 4 in.