Cement Siding Over Existing Hardie Board

Jim talks about when and how to put your new siding right over your existing siding.

Cement siding over existing hardie board.

Keeping your existing siding. James hardie siding is made of cement so it will absorb moisture if it is installed like this. 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. Left unchecked small issues can become major problems that could end up costing thousands of dollars to rectify.

This is the main task to tackle to make sure that there are no preexisting issues on the home. To achieve the look you ll use hardiepanel vertical siding as your base material. 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.

If hardie is installed too close to these surfaces there is a chance that the paint will start to bubble and peel. James hardie fiber cement siding is engineered to stand up beautifully whatever the elements and comes with the option for an authentic woodgrain finish. Why siding over existing siding is a bad move yes you may be able to save some money by not removing the old siding but that old siding could be hiding problems that may bite you down the road. That said this is where you want to start when deciding if you should keep it.

0 312 in x 8 25 in x 144 in hardieplank primed woodgrain lap fiber cement siding panel. Number one you can t shoot the hardiplank siding into the voids in your dutch lap siding. We ve been providing a better way to build for over 100 years.