How To Seal Siding Joints

Wall corner siding trim flashing details.

How to seal siding joints. A lot of moisture from rain snow misdirected sprinklers or exuberant water fights can get in there enough to do some serious and expensive damage. Although lp building products siding is available bare or painted cutting the materials to fit during installation exposes some areas to the elements. 2 house built before 2008 so has no flashing okay to caulk. Lp requires a minimum 3 16 spacing at all butt joints.

It provides an easy and efficient method for siding rustic structures like barns and sheds and is commonly used on houses as well. 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. 1 i chose this caulk because it has 25 flexibility compared to silicone based caulk. How much space do you need between lap siding pieces.

Do i have to caulk at butt joints. Butt joints are a perfect example of poor joint design they re too small to accommodate a bond breaker so the caulk can t stretch properly once applied but they re also too large to simply leave alone. Lp siding requires flexible exterior grade paintable caulk to seal gaps. Tthis article gives specifications for proper flashing sealing detailing at building siding joints corners and window or door openings to provide an attractive and durable job that doesn t leak or rot.