Cement Siding Over Existing Hardie Board

0 312 in x 8 25 in x 144 in hardieplank primed woodgrain lap fiber cement siding panel.

Cement siding over existing hardie board.

To achieve the look you ll use hardiepanel vertical siding as your base material. According to the best practices manual from james hardie existing siding can be used as a substrate as long as it is in good condition meaning that it is not warped bowed curling delaminated or rotting. This is the main task to tackle to make sure that there are no preexisting issues on the home. James hardie siding is made of cement so it will absorb moisture if it is installed like this.

James hardie is the world leader in fiber cement siding and backerboard. We ve been providing a better way to build for over 100 years. That said this is where you want to start when deciding if you should keep it. Imo it would not be a good idea to go over it.

Number two even if you tried to match the exposure of the existing siding let s say the dutch siding is 5 on center and you picked 6 1 4 hardi that would also have a 5 exposure so that you would always be nailing. Left unchecked small issues can become major problems that could end up costing thousands of dollars to rectify. Without properly inspecting and examining your current siding it s probably hard to tell its actual condition. If hardie is installed too close to these surfaces there is a chance that the paint will start to bubble and peel.

Number one you can t shoot the hardiplank siding into the voids in your dutch lap siding. Keeping your existing siding. Jim talks about when and how to put your new siding right over your existing siding.