What you're actually dealing with
Most mid-century paneling isn't solid board. It's usually a thin plywood or hardboard sheet with a printed or veneered wood-grain face, nailed or glued to furring strips, studs or right over drywall. In lower-level family rooms, it's often fixed to furring strips fastened to the concrete foundation wall, with little or no insulation in between.
That construction slows drying. A sheet of paneling resists water on its face, so the stain or swelling you see usually sits 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 strips stay damp enough to grow 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 doesn't 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; removing 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 you far more than a reading on the panel face.
Remove one panel if the readings run high
Panels are often nailed, so one sheet can come off at a seam to inspect the cavity. Number it if you plan to put it back.
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 the ones that swelled or show growth.
What usually stays and what usually goes
| Component | Often dryable | Often replaced when |
|---|---|---|
| Paneling face sheet | Plywood, after clean water and quick drying | Hardboard has swollen, the veneer has lifted, or growth is on the back |
| Furring strips on concrete | Solid wood strips, if reached quickly | Soft, stained or growing something |
| Insulation behind the panels | Rarely | Any time it's 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.