How Much Of A Gap Do You Need In Siding

Generally an acceptable gap between deck boards is between 1 8 inch and 1 4 inch.

How much of a gap do you need in siding.

Install lap siding without shiplap edges to incorporate a 3 16 inch gap at the butt joints between adjacent pieces of siding. Allow a 1 4 in. Leave a 1 8 gap between the siding and the trim or other materials to allow for structural movement. 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.

How much space do you need between lap siding pieces. Vertical trim gap caulking. We need air circulation behind these boards and the opening acts as a water exit should water ever go behind the boards. 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.

Both sizes have their pros and cons. Caulking siding trim windows doors etc. Vinyl siding must be nailed so expansion and contraction are not restricted. Always caulk between the siding and the trim.

Do not caulk between siding and any built in receiving channels located at or around windows. Siding must be cut in lengths to provide for expansion. On most new homes the trim goes up after the siding is installed which creates a large gap that should not be caulked. Lp requires a minimum 3 16 spacing at all butt joints.

Correct methods and techniques. The eighth inch spacing provides for a safer surface for walking. Gap for expansion wherever siding butts accessories.