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How Hardboard Fails
Hardboard is wood fiber pressed with resin. Once the paint fails and water gets in, especially at the bottom edge of each board, it swells, softens and grows mold along the drip line. On a two-story house the worst of it is usually the course just above the brick, where water runs down and sits.
Fiber cement, a mix of cement, sand and cellulose fiber, is the usual replacement. It does not swell, does not feed rot, and holds paint longer when it goes on primed or factory-finished.

What a Siding Job Covers
- Removing the old siding and checking the sheathing and studs behind it.
- Replacing house wrap, and flashing at windows and where siding meets brick.
- Installing planks with the right gap at trim and kick-out flashing where a roof edge meets the wall.
- Caulking and painting, unless the product is prefinished.
Ask whether trim is included, and whether the contractor replaces wood trim with fiber cement or composite at the same time.
Just One Wall?
Matching old hardboard is hard; its profile is often discontinued. Doing a whole elevation, or all the siding above the brick, gives a cleaner result than a patch.
Siding Going Soft Up High?
Call with the address. A siding contractor who works in Tomball calls back.
Call (346) 273-0697 Use the Form
Tomball Roofing