Should New Fiber Cement Siding Be Primed Before Painting

Our distinctive gold primer for hz10 products and green primer for hz5 products are climate tested and engineered to enhance the performance of paint on james hardie fiber cement siding.

Should new fiber cement siding be primed before painting.

I am having a new house built they are. There are two common versions for use on homes apartment buildings or commercial structures. Whether you ve got a colorplus finish or custom paint on your existing hardie siding you don t have to use primer when re painting hardie. This version allows you to paint the fiber cement siding in whatever color scheme you choose after installation.

Using the proper materials and paint for fiber cement or hardiplank siding a very good latex primer should be used to prepare the surface for paint. Hardie fiber cement siding is an excellent product but has different properties than typical cedar siding. For cement boards that have already been primed 100 acrylic exterior paint is recommended. Once all surfaces to be painted have be power washed thoroughly let the area dry before painting.

Prefinished siding arrives painted and ready for installation so it doesn t require a paint job or other preliminary maintenance. This is due to the fact that fiber cement does not soak in the painting products like cedar pine or other wood siding products. After your surfaces are primed it is strongly encouraged to use acrylic exterior paint for your home. Oil based primer takes a long time to dry and during this drying period it has much longer to soak in which causes way better gripping ability.

Finishing james hardie primed siding products s 100 august 2014 22 james hardie developed the first factory applied primer for fiber cement siding. Most unpainted fiber cement siding will be primed at the factory once it s shipped to you so your professional exterior paint expert will be able to paint as soon as the. Brand new fiber cement siding arrives prefinished factory primed or unprimed. All you should have to do is rinse your siding use a garden hose no pressure washers here to clean off any dust or dirt.

Most cement board manufactures offer a special primer for use on their unprimed siding selection. Complete the paint job by applying a top quality 100 acrylic latex paint that is recommended for use on. We know that hardie comes pre primed and they say you have 180 days to apply your top coat but we usually opt to prime before painting just in case the primer is older than we think it is. I read mfg recommendations and if i can i wash new siding that i am going to paint with tsp tri sodium phosfate i always use oil based primer for exterior and here s why.

To help your paint adhere to the fiber cement siding and to get the most uniform looking finish on your paint job the best practice is to apply one coat of a quality exterior latex stain blocking or masonry primer to all of the siding.