Expansion Gap For Siding

Vertical trim gap caulking.

Expansion gap for siding. Allow for expansion and contraction. Choose the right nails. Vinyl siding must be nailed so expansion and contraction are not restricted. Always caulk between the siding and the trim.

As a result the expansion gap between the top of the tongue and bottom of the groove can range from o to 1 8. If the panels are 20 feet 6 1 meters or longer refer to the manufacturer s instructions for how to increase the gap. Create a proper 3 16 space at minimum between the two pieces of siding. 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.

Gap for expansion wherever siding butts accessories. Remove any sawdust dirt or debris from the gap to prep it for finishing. Use a keyhole or reciprocating saw with a fine tooth blade to remove enough material from one of the pieces of lap siding. For siding up to 6 inches wide use one nail one inch up from the lap.

Allow a 1 8 inch expansion gap between pieces if the siding is air or kiln dried. Siding must be cut in lengths to provide for expansion. An improper expansion gap may have similar consequences to the results shown above especially if the milling process is irregular. Allow a 1 4 in.

Do not caulk between siding and any built in receiving channels located at or around windows. Increase to 3 8 9 5mm when installing in temperatures below 40 f 4 4 c. Do not nail through overlaps.