Should You Caulk Fiber Cement Siding?

For regular Hardiplank lap siding (the kind you paint AFTER installation), caulking at butt joints is optional. This from installation instructions: A high quality, paintable caulk is recommended. For best results use caulks that comply with either ASTM C 834 or ASTM C 920.

Do you have to tape seams on Hardibacker?

For tile backer boards such as Durock, Wonderboard, Hardiebacker, Permabase, and others the seams between the board need to be treated with 2-inch alkali-resistant mesh tape. Then a coat of thinset gets flat troweled over the seam. What this does is tie the two boards together and help prevent flexing.

Do you need plywood behind Hardie board?

Fiber cement siding should be installed over plywood, OSB, or sheathing. Be sure that the siding installed is dry. … Building codes will usually require installing siding over water-resistant barriers and nailed into the studs every 16 or 24 inches.

Does caulking Hardie board void the warranty?

Since 2008, James Hardie has discouraged the use of caulk where two pieces of lap siding come together on the side of a house. These such areas are called “field butt joints.”

Can you drill into Hardie board siding?

HardiePlank is available as ready-to-paint or with a color layer. Although the siding does not require drilling pilot holes, you may need to run wire or cable through the siding, necessitating drilling a hole.

What do you use to fill nail holes in hardiplank?

ColorPlus® Products

  1. ColorPlus® Touch-up Kits can be used to cover nicks, scrapes and nail holes that may occur over time.
  2. If the touch up area is larger than the size of a dime, the use of ColorPlus® Touch-up Kit is NOT recommended. It is advised to replace the damage siding with a new section of ColorPlus® siding.

Do you leave a gap between Hardie board siding?

Run the siding to the HardieTrim® board leaving a 1/8 in. gap between the siding and trim. The bottom of the siding should be kept even with the bottom of the trim, or if desired, the trim may extend below the bottom of the siding. But the siding should never hang below the trim.

Should there be gaps in Hardie board?

Gaps: Hardie boards should be joined in “moderate contact”. This means that the boards should be touching each other when they are installed. There is no need to leave a gap for expansion.

How long can Hardie board go unpainted?

Pre-primed products can sit for 6 months without paint. Unprimed hardie can sit for 3 months without paint.

What kind of paint do you use on Hardie board siding?

Use 100% acrylic paint or acrylic latex paint. Apply up to two coats of paint. Use a paintable caulk made to bond to fiber cement and your trim.

Where do you nail hardiplank?

Fastening Siding

Nails should penetrate through the sheathing and at least 1” into studs. Position nails ¾” to 1” from the edge of the siding. Siding can either be blind nailed at the top or face nailed at the bottom.

How often does Hardie board need painting?

What is Hardie Plank? Hardie Plank is a newer composite material made of concrete substrate. Hardie Plank is also called fiber cement siding. While it’s far heavier than aluminum, vinyl or wood, it is extremely durable and typically only needs a new paint every ten to twenty years for maintenance.

Can you nail into hardiplank?

Fiberboard cement siding can be hand-nailed, but because it’s so much harder and more brittle than wood, you have to predrill holes near any edge. You can save yourself a bunch of time by using a pneumatic coil siding nail gun. … Don’t drive nails into the siding at an angle.

What side of Hardie board goes up?

Which side goes up, smooth or rough? Either is acceptable, but we recommend that the smooth side with the nailing pattern of every 8″ on center go up.

Do you have to pre drill Hardie board?

You must pre-drill holes in the material before attaching the screws.

What is the difference between Hardie HZ5 and HZ10?

The Difference Between HZ5 and HZ10

The HZ5 siding is designed to withstand damage from ice, snow, and freezing temperatures. … Meanwhile, the HZ10 siding is formulated for areas where humid heat, salty sea air, and hurricane-force winds are present.

Does James Hardie siding fade?

Yes, Hardie siding will fade after prolonged periods of sun exposure. … ColorPlus is unlike a simple paint that you would apply to wood siding. This is a finish designed specifically for fiber cement. It is baked on to the siding in the same factory where the product is manufactured, and is warranted for 15 years.

Does Hardie board have a warranty?

James Hardie invented fiber cement and remains the leader in the field. Here’s what you’ll get when you invest in Hardie® siding and trim. … James Hardie’s range of siding products come with a 30-year, non-prorated warranty and trim products come with a 15-year, non-prorated warranty.

What are the cons of Hardie board?

The Cons

  • High Installation and Labor Costs: Hardie board siding requires more planning, a larger labor force, and takes longer to install due to its composition. It weighs about 300 pounds (100 square feet) compared to 60-70 pounds for vinyl siding. …
  • Maintenance: It has to be re-painted periodically.

Do termites eat Hardie board?

Hardie Board siding resists pests including termites and carpenter ants. It’s also woodpecker resistant, so you don’t have to worry about the hassles of repairing termite or woodpecker damage.

Can you install Hardie plank directly to studs?

HardiePlank® lap siding can be installed over braced wood or steel studs spaced a maximum of 24″ o.c. or directly to minimum 7/16″ thick OSB sheathing.

Does HardiPlank need to be primed before painting?

Sherwin-Williams Loxon Masonry Primer can be used to prime Hardie Board before painting. 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.


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