How Much Of A Gap Do You Need In Siding

Caulking siding trim windows doors etc.
How much of a gap do you need in siding. The eighth inch spacing provides for a safer surface for walking. Cedar shake style products have a shiplap edge at their ends that automatically aligns adjacent pieces with the proper gap but it s still necessary to leave a 3 16 inch gap between the siding and trim pieces. Do not caulk between siding and any built in receiving channels located at or around windows. Allow a 1 4 in.
Many jurisdictions following the international building code which requires a minimum 1 8 inch spacing between boards. Do i have to caulk at butt joints. We need air circulation behind these boards and the opening acts as a water exit should water ever go behind the boards. Correct methods and techniques.
It depends on the option you choose but if joint caulking option is selected seal all gaps at butt joints with a high quality exterior sealant meeting the astm c920 minimum class 25 sealant. How much space do you need between lap siding pieces. Siding must be cut in lengths to provide for expansion. Install lap siding without shiplap edges to incorporate a 3 16 inch gap at the butt joints between adjacent pieces of siding.
Always caulk between the siding and the trim. Vertical trim gap caulking. Lp requires a minimum 3 16 spacing at all butt joints. When installing in freezing weather below 40.
Vinyl siding must be nailed so expansion and contraction are not restricted. Leave a 1 8 gap between the siding and the trim or other materials to allow for structural movement. Gap for expansion wherever siding butts accessories.