Back Prime Siding

Dont know what type siding your using but hardie is already primed i think it 39 s primed on both sides i have installed it on my house even if not dont let the exposed side stay un painted too long or you will have to prime it use good paint and it will last a long time even cheap paint will do well on hardie.

Back prime siding.

Therefore do not prime the back side of the siding or trim. According to rick crotts my local james hardie representative it s not necessary to back prime any of the company s fiber cement siding products. Types of paint to use. For best results fresh siding should be pre primed on all six sides with a stain blocking primer and top coated with 100 percent acrylic latex paint.

Importance of back priming when installing wood siding. Frequently today s homes are wrapped with a vapor barrier i e. Back priming helps prevent paint from peeling by reducing the amount of water vapor that passes through the wood. While back priming has proven to be useful to control tannin staining with some types of solid wood siding trim and some composite sidings lp smartside products are not intended to be back primed.

Not only does back priming prevent rot it prevents bowing cupping. Back priming consists of applying a coat of primer to the reverse side and edges of boards before installing. He says that when panels are primed in the factory some primer ends up on the back of the boards as they pass over the rollers but this isn t a half hearted attempt at priming the backs. First of all lets explain what is back priming.

Alkyd oil primers are recommended but one may choose a high quality latex primer as long as it contains stain blockers. The back side is better left unpainted. Tyvek or foiled faced insulation which does not allow large moisture droplets to flow through. It simply means coating the backside of wood siding with one coat of naturecolor base coat or natureone before putting the siding up.

When back priming be sure to prime the ends of each piece after it has been cut to fit since end grain will absorb the most moisture. Where is the trapped moisture coming from.