Gap for expansion wherever siding butts accessories.
Expansion gap for siding.
Allowing for expansion and contraction.
Allow for expansion and contraction.
And it can move a lot through expansion and contraction especially along the length of the clapboard style panels.
James hardie recommends that a slip sheet joint flashing is installed behind each butt joint in the siding.
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.
Do not nail through overlaps.
Allow a 1 8 inch expansion gap between pieces if the siding is air or kiln dried.
For siding up to 6 inches wide use one nail one inch up from the lap.
Do not caulk between siding and any built in receiving channels located at or around windows.
If you are using primed siding you must seal all exposed cuts of siding including those at butt joints.
If joint moulding option is selected add the thickness of the web to the gap allowing a net 3 16 in.
There is no need to leave a gap for expansion.
Vertical trim gap caulking.
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.
Vinyl siding contracts and expands as the outside temperature changes.
Leave 6 4mm gap at the top and bottom.
Increase to 3 8 9 5mm when installing in temperatures below 40 f 4 4 c.
If the panels are 20 feet 6 1 meters or longer refer to the manufacturer s instructions for how to increase the gap.
Do i need to seal edges at a butt joint.
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.
Hardie boards should be joined in moderate contact.
These will serve as starter strips in which to lock the vertical siding.
Vinyl siding must be nailed so expansion and contraction are not restricted.
Lap siding can be installed horizontally or vertically.
Choose the right nails.
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.
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.
For horizontal applications start with the bottom course and work up with the channels pointing upwards.
Allow a 1 4 in.