How To Repair Cracked Hardie Board Siding?

by | Last updated on January 24, 2024

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You can easily fix it by

cleaning it and then using caulk to patch the gap

. “And it may take time to see it appear, so you won't know right away,” Jamie reads. When siding shrinks it causes a gap to form between the planks. The best way to fix these gaps is to clean the joint and then patch it with caulk.

How do you repair cracked fiber cement siding?

Can Hardie board be patched?

Dents, chips, cracks and other minor surface damage in Hardie® siding and trim products

can be filled with cementitious patching compound

.

How do you repair Hardie board damage?

To remove and replace damaged siding:


Cut the fiber cement siding to length (wear approved dust protection).

Blind-nail the fiber cement siding in place, starting with the bottom piece. Face-nail the top piece of fiber cement siding through the old siding. Prime and paint new siding to match the old.

Should you caulk Hardie siding?

APPLICATION: General: James Hardie believes

it is good building practice to seal the joints to prevent moisture, such as wind-driven rain and snow, from penetrating the wall cavity

. Caulking around windows, doors, eaves and trim edges gives added insurance that leaks will not occur.

How do you replace Hardie planks?

Can fiber cement siding be repaired?

or Patching Fiber Cement Board Siding

Refer to manufacturer recommendations for products that are compatible with fiber cement. For small areas of damage you can use a sealant/caulk (preferably one designed for cement repairs) but then you will have to paint those areas of repair to match the original color.

Does caulking Hardie board void the warranty?

These such areas are called “field butt joints.” In the case of James Hardie's Color Plus siding, which has a pro-rated 15-year warranty,

using caulk at field butt joints will flat out void your warranty

!

Does fiber cement siding crack?

While fiber-cement is one of the most durable exterior siding materials,

it can still crack on occasion

. Sometimes cracks are caused by incorrect siding installation. Other times, cracks crop up due to exposure to the elements.

How often should Hardie board be painted?

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. It is one of the best materials and long-term solutions for protecting your home.

Do you nail or screw Hardie board?

James Hardie prefers and recommends installation of HardiePlank® lap siding by the

blind nailing technique

, such that fasteners are hidden by the course above. Fasteners shall be installed between 1 in. and 3/4 in. from the top edge and no closer than 3/8 in.

How do you repair damaged siding?

How do you replace the bottom row of Hardie board siding?

What is the best caulk for Hardie board?

Product Type Weight
DAP INC 18152


Silicone

10.1oz
GE Sealants & Adhesives M90015 Silicone 10.1oz Dap 18001 Kwik Seal Caulk Silicone 5.5oz Gorilla White 100 Percent Silicone Sealant Caulk Silicone 10.1oz

Should Hardie board have gaps?

But I just read an FHB article (“Working with Fiber-Cement Siding”) from June/July 2001 that states that on walls 12′ or longer, Hardie recommends you leave 1/8′′ gaps between the lap pieces and the trim, and between the butt ends of adjoining lap pieces, to allow for expansion.

How do you remove Hardie plank siding without damaging it?

Slide the thin edge of a flat pry bar carefully under the lower edge of the first piece of HardiePlank siding to be removed. Use a mallet or hammer to gently drive the tip of the bar up behind the siding if necessary.

How do you repair composite siding?

How do you cut Hardie board?

How do you repair damaged cement board?


Use thin-set mortar to repair cracks or holes in cement boards

. Step 3: Mix up a small amount of thin-set mortar following the manufacturer's instructions. Thin-set mortar typically has a working time of less than 15 minutes, so smaller batches are the way to go.

Where do you caulk Hardie board siding?

Ugly Caulking

Wherever Hardie siding meets a trim board, the company recommends you

leave a 1/8” gap between the siding and the trim

and apply a 3/8” bead of approved caulking to protect and seal the edge of the siding.

How do you fill Hardie board joints?

Does painting Hardie board void the warranty?

Before you start painting, you should be aware that

repainting James Hardie ColorPlus siding will void your existing finish warranty

. However, repainting only voids your 15-year ColorPlus warranty, not your full James Hardie material warranty!

David Martineau
Author
David Martineau
David is an interior designer and home improvement expert. With a degree in architecture, David has worked on various renovation projects and has written for several home and garden publications. David's expertise in decorating, renovation, and repair will help you create your dream home.