What you are actually dealing with
Most mid-century paneling is not solid board. It is usually a thin plywood or hardboard sheet with a printed or veneered wood-grain face, nailed or glued to furring strips, studs or directly over drywall. In lower-level family rooms it is frequently attached to furring strips fastened to the concrete foundation wall, with little or no insulation in between.
That construction affects drying. A sheet of paneling resists water on its face, so the stain or swelling you see is usually at the bottom edge where water wicked up. Behind it, water can sit on the concrete or in the furring strips with almost no airflow. A room can look fine a week after a leak while the back of the panel and the wood strips stay damp enough to start growing mold.
Quick reference for paneling types
- Veneered plywood
- Holds up reasonably well if dried quickly; the face veneer may lift or delaminate
- Printed hardboard
- Swells and softens at the bottom edge; usually does not recover once swollen
- Solid tongue-and-groove boards
- Can often be dried and reused, though boards may cup
- Paneling glued over drywall
- Both layers trap moisture; removal of both is common
Checking behind paneling without wrecking it
Pull the baseboard first
Baseboard trim usually comes off cleanly and exposes the bottom edge of the panels and the plate or furring underneath.
Read the exposed edge
A meter on the bottom plate or furring strip tells far more than a reading on the panel face.
Remove one panel if readings are high
Panels are often nailed, so a single sheet can come off at a seam to inspect the cavity. Number it if you plan to reinstall it.
Look and smell
Dark staining, a musty odor or fuzzy growth on the back of the panel or the strips changes the plan.
Decide panel by panel
Keep sheets that are dry, flat and clean on the back; replace those that swelled or show growth.
What usually stays and what usually goes
| Component | Often dryable | Often replaced when |
|---|---|---|
| Paneling face sheet | Plywood with clean water and quick drying | Hardboard has swollen, veneer has lifted, or growth is on the back |
| Furring strips on concrete | Solid wood strips if reached quickly | Soft, stained or showing growth |
| Insulation behind panels | Rarely | Any time it is wet |
| Baseboard trim | Solid wood trim | Particleboard or MDF trim that has swollen |
General information for Lakewood, not a quote or professional advice. In an emergency, call 911.