Insulation Under Fiber Cement Siding

Lp siding with fern strips over insulation.

Insulation under fiber cement siding.

Addition to my house. Almost any type of siding can be installed over the rigid foam cedar or redwood planks exterior plywood sheets cement fiber board or vinyl siding are common options. These irregularities should be corrected before the siding is. James hardie offers either 30 or 50 year warranties on all of their fiber cement siding options.

I did use larger diameter ring shanked nails than specified to fasten the. Insulation and non nailable substrates. According to my calculations if i want to use rigid foam insulation on the outside of the 2x6 walls with r 21 fiberglass in the wall cavities i need at least r 11 25 in order to avoid condensation on the inside. Most homes in the united states are built with traditional wood frame construction with studs every 16 on center.

To be completely efficient this insulation type has to mold perfectly with the inside of your home siding. Installation of this insulation type under fiber cement siding can create an incredible 600 more energy efficient home. Well call me half hazard. Under driven nails can telegraph through to the fi nished siding and trim.

Fiber cement siding is a hardened concoction of cement sand and synthetic polymers. Continuous insulation under new siding has become a popular way to improve energy efficiency on an existing home because it addresses a problem known as thermal bridging. Of course i did this all knowing my warranty would be void. Insulation used with fiber cement siding it is important that the insulation product used when installing fiber cement siding will be able to level the wall and align each siding panel properly.

In fact you can check if it is a correct insulation installation by pressing on the house siding. Last year i installed lp lap smart trim shingles and the 4x8 sheets of lp with batts all over 3 of continous xps foam using fern strips. Designed to withstand physical trauma water damage and sun damage it can thrive in all climates. In the design or construction of structures with fi ber cement siding products made by others or siding products made from other materials.