Should I Use Big Stretch Chaulk On Hardie Siding

Trim boards that sit on top the siding.

Should i use big stretch chaulk on hardie siding.

Many professionals like those at james hardie also agree that you should not use caulk on fiber cement siding unless there is no metal flashing underneath. This is one of the caulks that is versatile and can be used for both exterior and interior applications. Flashing acts as a. It s also recommended to use a cloth or rag ready to wipe up and smooth excess caulking before it sets on the siding.

The type of paint you use on hardie plank is important to ensuring the life of the paint project. Joint flashing butt joint horizontal lap treatment june 2014 james hardie does not. Hardie siding problems a k a. For best results use caulks that comply with either astm c 834 or astm c 920.

Caulking at butt joints is optional. A high quality paintable caulk is recommended. But you are correct that it is very difficult to paint. If you re installing hardie plank for the first time on a new build or.

Best kind of paint to use for hardie plank and fiber cement siding. This works perfectly for sealing soffits eaves vents siding doors and windows as well as baseboards among others. 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. James hardie recommends the use of caulks and sealants that remain permanently flexible.

I m charis w sashco makers of big stretch. Placing caulk over large portions of wood siding prohibits the natural movement of the wooden panels and can cause extensive damage to the exterior of your home. In the old days the builder would install the trim bring the siding up to it and caulk the corner. Fiber cement problems are rare but do happen from time to time.

What you want to use is a silicone caulk because it s the most permanent one. Look for the words permanent flexibility or permanently flexible written on the label. Leave 1 8 gap at trim for caulk. It won t work nor will most caulks.

What should never be caulked. The sashco 10016 is commonly referred to as the big stretch. Fiber cement is a siding material that was first introduced in the 1980 s as a replacement for asbestos cement wood aluminum and vinyl siding products. Those joints are simply too small to accomodate proper joint design and a good amount of caulk and then they move too much as a percentage to allow any caulk to hold its seal.

It s got good adhesion and expands and contracts. In fact with the right paint and application hardie plank siding can look good for up to twenty years. Problems with hardie siding. Please do not use big stretch on hardiplank butt joints.

Caulking should be applied in accordance with caulking manufacturers written instructions.