Masonite Hardboard Siding in Austin, TX — Replacement and What to Expect
Masonite siding — sold under the Masonite brand but generically called hardboard siding — is a compressed wood fiber panel product installed on millions of American homes between the 1970s and late 1990s. It was marketed as a cost-effective, paintable alternative to solid wood siding. In practice, it proved highly vulnerable to moisture intrusion, swelling, delamination, and rot — particularly in humid climates — leading to a major class action lawsuit against Masonite Corporation in the late 1990s and the product’s eventual discontinuation. In Austin, hardboard siding remains on thousands of homes from that era, often hidden underneath vinyl that was installed over it without removal. This page covers what hardboard siding is, how it fails, why it’s so common on Central Texas homes, and what replacement looks like. For the full material comparison, see the siding types overview or the siding replacement overview.
What Is Masonite / Hardboard Siding?
Hardboard siding is manufactured by compressing wood fiber and resin under high heat and pressure into dense panels and lap boards — a process called the Masonite process, named for William H. Mason who developed it in the 1920s. The Masonite Corporation became the dominant manufacturer, and the brand name became the generic term for the product category, similar to how Xerox became synonymous with photocopying.
It’s important to understand what hardboard is and isn’t. Hardboard (sometimes called HDF — high-density fiberboard) is a different product from MDF (medium-density fiberboard). Hardboard is denser, harder, and more water-resistant than MDF — but that relative resistance was still not sufficient for sustained outdoor exposure in humid climates, which is the core of why it failed so broadly in real-world use.
What Hardboard Siding Was Marketed As
- Low-cost alternative to solid wood siding
- Paintable surface that held finish well when new
- Dimensionally stable compared to solid wood
- Resistant to splitting, cracking, and warping
- Factory-primed and ready to paint on installation
What Hardboard Siding Actually Does Over Time
- Absorbs moisture at cut edges, seams, and nail holes
- Swells, buckles, and loses structural integrity
- Paint adhesion fails as the surface fibers break down
- Delamination — layers separate and peel apart
- Rot sets in at base courses and any compromised edge
- Fungal growth behind the surface once moisture is trapped
For what these symptoms look like in the field, see siding rot and soft spots →
Why Hardboard Siding Is So Common on Austin-Area Homes
Austin’s residential construction boom of the 1980s and early 1990s coincided almost exactly with the peak of hardboard siding’s market dominance. Builders in this era chose it for the same reasons builders everywhere did: it was cheaper than wood, faster to install, and looked acceptable on completion day. Subdivisions throughout Cedar Park, Round Rock, Pflugerville, and the inner Austin suburbs were built almost entirely with hardboard siding during this period.
The problems began appearing within five to ten years of installation in many cases — earlier on homes with installation shortcuts, later on homes with more careful original workmanship. By the mid-1990s, class action litigation was underway, and Masonite Corporation ultimately settled for hundreds of millions of dollars in a nationwide class action. The product was reformulated and later discontinued for residential siding applications.
The Masonite Class Action Settlement
In the late 1990s, Masonite Corporation settled a nationwide class action lawsuit covering homeowners whose hardboard siding had failed prematurely due to moisture-related defects. The settlement provided compensation for qualifying damage — but only for homeowners who filed claims within the settlement window. That window closed years ago. Homeowners with failing hardboard siding today are outside the settlement period and responsible for replacement costs.
If your home was built between roughly 1975 and 1998 and has never had siding replaced, there is a meaningful probability that hardboard siding is either on the walls now or was covered over with vinyl without being removed.
How Hardboard Siding Fails
Hardboard failure follows a predictable sequence. Understanding where in that sequence your home is helps determine the right scope of response — repair, partial replacement, or full re-side.
Stage 1: Paint Failure
The first visible sign is usually paint peeling — starting at bottom edges, cut ends, and nail holes where moisture enters most easily. The paint film lifts as the surface fibers begin to break down underneath it. Many homeowners repaint at this stage without realizing the substrate is the problem, not the paint application.
Stage 2: Swelling and Buckling
As moisture penetrates deeper, hardboard panels begin to swell and buckle — visible as wavy, irregular surfaces or boards that have pulled away from the wall. This is structural degradation, not a cosmetic issue. Boards at this stage cannot be salvaged by repainting or surface treatment.
Stage 3: Delamination
The compressed layers of the board begin to separate. Sections of the surface pull away in sheets, exposing the interior fiber. At this stage the material has lost structural integrity entirely and is actively allowing water to reach the sheathing and framing behind it.
Stage 4: Rot and Structural Damage
With sustained moisture contact at the sheathing and framing, rot progresses into the wall assembly. This is the most costly outcome — what started as a siding replacement project now involves framing repairs before new cladding can be installed. Homes where this stage is reached almost always have a history of the problem being ignored or patched rather than addressed.
Animal and Pest Damage
Softened, moisture-damaged hardboard is one of the materials animals target most readily on Austin-area homes. Woodpeckers drill into boards that have begun to delaminate — the hollow sound and soft surface make easy work. Squirrels and rodents chew swelling bottom edges where the fiber has broken down. Animal damage on siding that appears to be a wildlife problem is frequently a hardboard deterioration problem — the animals are finding what the moisture already started.
These failure modes often appear together rather than in clean sequence — a home showing paint failure at the base is frequently also developing soft spots and attracting wildlife at the same areas. The common siding problems overview covers all of these symptoms in detail and helps identify where in the failure progression your home currently sits.
The Vinyl Cover-Up Problem
The most complicated hardboard situation we encounter on Austin-area homes isn’t exposed, visibly failing hardboard. It’s hardboard that was covered over with vinyl siding years or decades ago — and has been deteriorating silently underneath ever since.
Through the 1990s and 2000s, a common contractor practice was to install vinyl directly over failing hardboard without removing it. It was faster, cheaper, and produced a home that looked completely acceptable from the street. The homeowner saw new siding. What they actually got was a sealed system where the hardboard continued to trap moisture, swell, and rot behind the vinyl with no way to dry out and no way for the homeowner to see what was happening.
What a Substrate Assessment Finds
On a vinyl replacement project, the substrate assessment is the first thing we do before any scope is written or material is recommended. When the vinyl comes off a home with covered hardboard, the spectrum of what we find runs from hardboard that is still structurally intact — just aged — to hardboard that is fully delaminated and rotted through to the framing behind it. Where on that spectrum your home falls determines the correct scope and cost of the project.
We document what we find with photos before any work proceeds. You see exactly what the wall condition is before we recommend anything. The siding appointment page explains how that process works start to finish.
The same cover-up pattern applies to T1-11 plywood panel siding, which was also commonly covered rather than removed during re-siding projects in this era. If your home was built between 1975 and 1995 and has vinyl on it, there’s a meaningful chance what’s underneath hasn’t been inspected since it was installed.
What Hardboard Siding Replacement Looks Like
Hardboard replacement follows the same full tear-off process as any substrate-unknown project. No new cladding goes over hardboard — regardless of its current condition — because the material is past its service life even when it hasn’t visibly failed yet.
Free Inspection
We probe for soft spots, assess visible condition, and give you a clear picture of what we expect to find before scope is written.
Complete Tear-Off
All hardboard and any overlaid vinyl comes off. Full wall access — no new system goes over old material.
Substrate Correction
Sheathing damage, rot, and framing issues are addressed. Failed or missing flashing is corrected before anything is installed over it.
Written Scope
Full itemized scope documented before any material is ordered. No surprises after work begins. See our siding installation checklist.
Fiber Cement Installation
Preferred-standard James Hardie fiber cement installation from WRB through trim. Full process on the installation process page.
Cost for a hardboard replacement project depends on home size, story count, extent of substrate damage found, and profile selection. Projects with significant framing or sheathing damage add scope that can’t be fully quantified until tear-off is complete. A detailed cost breakdown by project type is on the siding cost page.
Frequently Asked Questions
How do I know if my home has Masonite hardboard siding?
Homes built between approximately 1975 and 1998 are the primary candidates. Hardboard siding has a smooth or lightly textured surface, is available in lap board and panel formats, and will show characteristic swelling and paint failure at bottom edges and seams when it’s degrading. If you press firmly on a section near the base of the wall and it feels soft or gives slightly, that’s a strong indicator of moisture damage. A professional inspection can confirm the material and assess its condition. The best starting point is a free siding assessment.
Can Masonite hardboard siding be repaired rather than replaced?
Individual boards or sections can be replaced if the damage is isolated and the surrounding material is still structurally sound. The problem is that hardboard failure rarely stays isolated — once moisture has found entry points, it travels laterally and damages adjacent sections over time. Partial repair also doesn’t address the age of the surrounding material, which is past its service life even where it hasn’t visibly failed yet. For most homes with hardboard in this market, full replacement is the more cost-effective long-term answer. We’ll tell you honestly which situation applies after seeing the wall condition.
Is there hardboard siding underneath my vinyl?
Possibly — particularly if your home was built between 1975 and 1995 and the vinyl was installed as a re-side rather than original construction cladding. The only way to know is to pull a section of vinyl or have a professional inspect at seams and trim transitions where the substrate may be visible. This is a standard part of how we approach any vinyl replacement project in Austin. We don’t recommend new cladding over vinyl without knowing what’s underneath it.
What replaced Masonite hardboard siding?
James Hardie fiber cement siding is the dominant replacement material for hardboard on Austin-area homes — and the material we install. It solves the core failure modes of hardboard directly: fiber cement doesn’t absorb moisture, doesn’t swell or delaminate, and doesn’t give insects or fungal growth anything to consume. It’s heavier and more expensive than hardboard was, but its performance under Central Texas conditions is in a different category entirely.
Am I still eligible for the Masonite class action settlement?
No. The primary Masonite class action settlement closed its claims period years ago. Homeowners with failing hardboard siding today are outside the settlement window and are not eligible for compensation from that litigation. If you believe you may have a separate warranty or legal claim, that’s a question for an attorney — we’re not able to provide legal advice. What we can do is assess your siding condition and give you a clear picture of what replacement involves and what it costs.
How much does Masonite hardboard siding replacement cost in Austin?
Installed cost for a full hardboard replacement with fiber cement in the Austin metro typically runs $14 to $20+ per square foot depending on home size, story count, substrate condition found at tear-off, and profile and trim scope. Projects where the hardboard has allowed moisture to reach the sheathing or framing involve additional substrate correction costs that can’t be fully scoped until tear-off is complete. A detailed breakdown by project type is on the siding cost page. The accurate number for your home comes from a free on-site assessment.
Think You Have Hardboard Siding? Find Out What’s Actually There.
We’ll assess the wall condition, tell you honestly what we find, and give you a clear scope before anything is priced or ordered. Review what to expect on your appointment before we talk.
- Full substrate assessment included at no cost
- No deposit required to get started
- Written scope before any work begins
- 10-year workmanship warranty on every installation