What Is Wet Rot on Wood?
Wet rot is a type of fungal decay that affects timber exposed to excessive moisture over time. Unlike dry rot, which can spread even to relatively dry wood, wet rot remains localized to areas where the wood stays damp. Left untreated, this issue can weaken structural integrity and lead to costly repairs.
How Does Wet Rot Happen?
Wet rot thrives in basements, crawl spaces, or attics where poor ventilation, leaks, or high humidity create a persistently damp environment. Sources of moisture may include:
- Leaking roofs
- Plumbing leaks
- Blocked gutters or downspouts
- Flooding
- Condensation
When wood absorbs water, it softens and becomes an ideal breeding ground for fungi that feed on cellulose, the material that gives wood its strength. Over time, this leads to decay and deterioration.
Signs of Wet Rot in Your Home
If you suspect wet rot, here are some common indicators to look for:
- Soft, spongy wood
- Dark discoloration or a bleached appearance
- A damp, musty smell
- Flaking paint or varnish
- Cracks or splits in the wood
In severe cases, the wood may crumble under slight pressure or appear visibly deformed.
Wet Rot vs. Dry Rot – What’s the Difference?
Though both are types of fungal decay, wet rot and dry rot have distinct differences.
- Wet rot requires a constant source of moisture to thrive.
- Dry rot can spread through wood that is not actively wet and even travel through masonry to find new sources of wood to infest.
Wet rot is generally less destructive than dry rot, as it doesn’t spread as aggressively. However, it can still cause severe damage if not addressed promptly. The presence of wet rot compromises the strength and stability of wooden structures, potentially leading to:
- Sagging floors
- Damaged support beams
- Collapsed ceilings
- Unsafe stairs or decks
How to Prevent Wet Rot
Beyond structural concerns, wet rot can also diminish your home’s value and contribute to a damp, unhealthy living environment. Avoid problems with these solutions.
