Expansion Gap For Siding

Do not caulk between siding and any built in receiving channels located at or around windows.

Expansion gap for siding.

Siding must be cut in lengths to provide for expansion. Use a keyhole or reciprocating saw with a fine tooth blade to remove enough material from one of the pieces of lap siding. Vertical trim gap caulking. For siding up to 6 inches wide use one nail one inch up from the lap.

Allow for expansion and contraction. An improper expansion gap may have similar consequences to the results shown above especially if the milling process is irregular. 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. Always caulk between the siding and the trim.

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. Vinyl siding must be nailed so expansion and contraction are not restricted. Do not nail through overlaps. Remove any sawdust dirt or debris from the gap to prep it for finishing.

Leave a 1 8 gap between the siding and the trim or other materials to allow for structural movement. Create a proper 3 16 space at minimum between the two pieces of siding. Gap for expansion wherever siding butts accessories. When installing in freezing weather below 40.

If the panels are 20 feet 6 1 meters or longer refer to the manufacturer s instructions for how to increase the gap. As a result the expansion gap between the top of the tongue and bottom of the groove can range from o to 1 8. Choose the right nails.