Expansion Gap For Siding

As a result the expansion gap between the top of the tongue and bottom of the groove can range from o to 1 8.

Expansion gap for siding.

Allow for expansion and contraction. Always caulk between the siding and the trim. Choose the right nails. When installing in freezing weather below 40.

Leave a 1 8 gap between the siding and the trim or other materials to allow for structural movement. For siding up to 6 inches wide use one nail one inch up from the lap. Siding must be cut in lengths to provide for expansion. Increase to 3 8 9 5mm when installing in temperatures below 40 f 4 4 c.

Use a keyhole or reciprocating saw with a fine tooth blade to remove enough material from one of the pieces of lap siding. An improper expansion gap may have similar consequences to the results shown above especially if the milling process is irregular. Vinyl siding must be nailed so expansion and contraction are not restricted. If the panels are 20 feet 6 1 meters or longer refer to the manufacturer s instructions for how to increase the gap.

Face nail with two nails per piece for 8 inches patterns and wider keeping nails 2 1 2 to 3 inches apart to allow for dimensional movement without splitting. Gap for expansion wherever siding butts accessories. Allow a 1 4 in. Allow a 1 8 inch expansion gap between pieces if the siding is air or kiln dried.

Do not nail through overlaps. Remove any sawdust dirt or debris from the gap to prep it for finishing. Create a proper 3 16 space at minimum between the two pieces of siding.