15-20 Minute Assessment

Fiber Cement Siding

A blend of wood and masonry, this siding is nailed to a plywood base. A vapor barrier between siding and base keeps water out of your home and lets moisture drain.

Fiber cement resists insects, water, and fire. It shrinks and swells less than wood, so it holds paint well. Cracking is the main issue, especially from impacts in cold weather. Cut ends can take on water and swell, damaging other boards.


Every spring and fall

Repair and replacement costs

Typical Costs

  • Repair: $800 – $1,400
  • Replace: $5,500 – $18,000

Life span


30 years

Steps to Assess Your Fiber Cement Siding


Step 1: Look for bloated, peeling, or chipping paint. If the paint is damaged, apply a new coat. If the siding isn’t painted, consider painting it for an added layer of protection.


Step 2: Check for missing, cracked, or otherwise damaged siding. Water can seep through even small cracks. Replace or repair damaged siding right away.


Step 3: Check the joints where siding butts against windows, doors, and other siding. Make sure the joints are tight and open spaces are caulked. If you find gaps, seal them.


Step 4:  Remove anything growing on the siding. Moss, lichen, mold, and vines can damage fiber cement. Make sure shrubs are trimmed back at least 6 inches from your walls


Step 5: Stains, swollen joints, or areas that stay damp indicate a moisture problem. If you’re concerned, contact an environmental testing professional to conduct a moisture test.