Caulking Cemplank Siding

Irregularities in framing and sheathing can mirror through the finished application.

Caulking cemplank siding.

Cemplank lap siding and cempanel vertical siding can be installed and finished like wood. 1 i chose this caulk because it has 25 flexibility compared to silicone based caulk. What must be caulked caulking corners. See general fastening requirements.

Cemplank lap siding can be installed over braced wood or steel studs spaced a maximum of 24 in. However this detail may not be effective at sealing the ends allowing water to be absorbed and swell the board ends. Leave a 1 8 gap between the siding and the trim or other materials to allow for structural movement. This is a must do for all houses.

When to use caulk on exterior siding siding caulk can be used on several different areas of your exterior siding to help prevent water damage and moisture buildup. Butt joints but not all butt joints. Always prime or paint any cut edges that are inserted into a window j channel. V caulk replacement when sealant is in need of replacing carefully remove existing caulk and replace with a high quality paintable latex caulk.

2 house built before 2008 so has no flashing okay to caulk. Where two pieces of siding meet. Or directly to minimum 7 16 in. Always caulk between the siding and the trim.

Some of the most commonly caulked areas of siding include both corners and crevices as well as some butt joints and window and door trim boards. Unlike similar sounding silicone caulks siliconized acrylic caulks can be painted so they enhance the finished appearance of the paint job. Trim boards wood windows. Caulk and seal all cracks in the siding as well as any open seams joints or gaps with a quality acrylic or siliconized acrylic caulk.

Cemboard fiber cement siding products are an attractive and durable alternative to vinyl and wood based siding. For best results use a latex caulk that complies with astm c 834 astm c920 or better. Caulking around windows doors eaves and trim edges gives added insurance that leaks will not occur. Should they always be caulked.

When james hardie siding products butt into wood based materials a 1 8 gap will allow for expansion and contraction of the wood based product. A mark parlee a general contractor in des moines iowa responds in my experience water that gets trapped against fiber cement sidingcan be absorbed by the material causing joints to swell and shrink during freeze thaw cycles. Caulk is usually used with fiber cement siding to prevent water intrusion at the butt joints. Do not caulk between siding and any built in receiving channels located at or around windows.