Siding Showdown: Wood vs. Hardie Board for Problematic Walls

Title Idea: "Wood vs. Hardie Board (Fiber Cement) Siding: Which is Best for Tough Climates & Problem Walls?"

Alternative Titles:

  • "Siding Showdown: Wood vs. Fiber Cement for North-Facing & Icy Walls"
  • "Choosing Siding (Wood or Hardie) When Your Wall Gets No Sun & Lots of Ice"
  • "Stop Siding Rot! Best Materials for Shady, Damp House Walls"

Content Focus/Explanation: This content will tackle the common homeowner dilemma of choosing between traditional wood siding and modern fiber cement siding (like HardiePlank), especially for challenging exposures such as north-facing walls, areas with little sunlight, or walls prone to ice buildup and moisture. It will compare the two materials across key decision-making factors:

  1. Durability & Resistance:

    • Moisture & Rot Resistance (critical for "cold side" / ice buildup).
    • Pest Resistance (termites, woodpeckers).
    • Impact Resistance & Fire Resistance.
  2. Maintenance Requirements:

    • Painting/staining frequency.
    • Cleaning needs.
    • Repairability.
  3. Cost:

    • Upfront material and installation costs.
    • Long-term cost of ownership (factoring in maintenance and lifespan).
  4. Aesthetics:

    • Look and feel of real wood vs. engineered products that mimic wood.
    • Variety of styles and finishes.
  5. Installation Best Practices (Crucial for Longevity):

    • Flashing: Explain its importance, especially around windows, doors, and roof-to-wall intersections (as highlighted in comments).
    • Air Gaps/Clearances: Discuss the need for proper gaps between siding and roofing, ground, or other surfaces to prevent moisture wicking and allow drying (as highlighted in comments).
    • Mention proper nailing/fastening techniques.
  6. Environmental Considerations/Sustainability (Optional but good):

    • Sourcing of materials, embodied energy, recyclability.

Why it's potentially popular ("Hot"):

  • Common, High-Stakes Decision: Siding replacement is a significant investment for homeowners.
  • Problem/Solution Focused: Addresses a specific pain point (problematic walls) that many homeowners face.
  • Direct Comparison: Clearly lays out pros and cons, aiding decision-making.
  • Addresses Confusion: The "wood vs. X" debate is perennial, and Hardie Board is a leading alternative.
  • Practical, Actionable Advice: Including installation tips empowers homeowners, whether they DIY or hire a contractor (helps them ask the right questions).
  • Search Intent Match: Directly answers "how to choose siding," "what siding is best for X condition," "wood vs. Hardie board."

Target Audience:

  • Homeowners planning siding replacement or significant siding repairs.
  • DIY home improvers looking for guidance on material selection and best practices.
  • Homeowners who are hiring contractors but want to be informed about their choices and ensure quality installation.
  • Specifically, individuals dealing with existing siding problems on moisture-prone or "challenging exposure" walls.

Origin Reddit Post

r/diy

Should I replace with wood or hardie board?

Posted by u/tuffdangerous05/28/2025
Planning on painting the house later in the summer. Need to address this siding first. It’s the “cold” side of the house that doesn’t see much sun and ice seems to build up there in the winte

Top Comments

u/QuikWitt
You’re gonna DIY this? That pitch is scary AF. Make sure you are safe. Saving the money may not be worth it. ETA - you could use PVC trim with hardi butting to the trim. That way most of the
u/Anal_Recidivist
The flashing (called L flashing) should be behind the siding. Your comment makes me think you want it on the outside
u/MrMcKleen
Hardieboard with flashing and a larger gap.
u/Mr_Festus
We all make mistakes, man...
u/disposeable1200
...recovering architect?
u/decaturbob
Is it real rot or just algae and dirt?
u/MrMcKleen
Hardieboard with flashing and a larger gap.
u/0nSecondThought
You mean step flashing
u/BluesEyed
I’d use pvc there. Neither wood or hardy will hold up.
u/duderguy91
What are you doing step flashing!?
u/freerangemary
Always Hardie Board. I’m a recovering Architect, and as much as I love wood, it’s not for the masses. That’s a bad elevation, and it’s likely on the north side. If you go with wood, do be
u/freerangemary
Always Hardie Board. I’m a recovering Architect, and as much as I love wood, it’s not for the masses. That’s a bad elevation, and it’s likely on the north side. If you go with wood, do be
u/Why-am-I-here-anyway
As mentioned - a MINIMUM 2" gap is needed regardless of the siding. See all that debris caught between the siding and the roofing? That should wash itself clean any time it rains hard. The
u/ImSadness
You could cut back the wood from the roof about 2 inches and install flashing. Then power wash the wall. I don't think it's in bad shape to replace yet.
u/blackhawk905
Some of the architects my company deals with need to follow in his footsteps, good lordy
u/joelyrolypoly
Not on outside lol. Flashing in corner, then siding
u/Mud_Butt_JKU
Hardie will call for a minimum 2" clearance roof-to-wall and a kick out flashing.
u/0_SomethingStupid
As a practicing architect this advice is trash. Hardiboard is in no way longer lasting than wood siding. You are out of your mind. Would avoid hardiboard given the condition of ice build up h
u/Orpheus75
Burn him anyway!
u/TyrosineJim
He got better
u/joelyrolypoly
Whatever you use, it shouldnt be tight to the roofing. There should be flashing in the corner and siding starting a couple inches above
u/Synth_Ham
He's the reason that both small rocks and churches float.
u/elcroquistador
Agreed, the cut ends here are not durable, even if they’re thoughtfully primed after cutting. In our cases the flashing holds up well and keeps the sheathing in good shape but the splashback
u/False-Impression8102
Uh…you know I’m always flashing. It’s in my nature.
u/WLeeHubbard
Yes Hardie is great, however be sure to check the install doc, you are not supposed to install Hardie within 2” of the roof. You can uses PVC trim board there with flashing so you can keep it
u/TwentyOneTimesTwo
And if it's a wood-based product, the lower edge should be coated with a thin layer of something like Dynaflex 230 before painting. Snow can sit there easily up against the lower edge. Unse
u/Magnusg
I think the main point is add the gap
u/joelyrolypoly
Whatever you use, it shouldnt be tight to the roofing. There should be flashing in the corner and siding starting a couple inches above
u/Tistanal
This siding would have been fine if it had been flashed and cutback from the roofing appropriately. If you’re going to replace the siding, I’d pull it all off, do the flashing and replace wit

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