How Quickly Does Woodworm Spread? Room, House & Furniture
Woodworm spreads more slowly than most people fear, but it does spread. Learn how fast it moves between rooms and furniture and how urgent treatment really is.
Woodworm spreads more slowly than most people fear. It still spreads, though, and the pace depends on the beetle, the wood and the damp. This guide explains how fast woodworm moves and how urgent treatment is.
How woodworm spreads
Spread happens when adult beetles fly or crawl to new wood. They lay eggs in cracks and rough surfaces. The grubs then hatch and bore in.
Because adults live only a few weeks, each one has limited time. Most lay eggs close to where they emerged. As a result, an infestation tends to grow outward from one spot.
From room to room
Beetles can move between rooms through connected timber, such as floor joists and roof rafters. They can also fly through doorways and lofts. Even so, the spread is usually slow, and many homes only have a local problem.
Damp makes the difference. Damp wood is easier to eat, so an infestation that meets damp timber in a nearby room can take hold quickly. Fixing the damp is therefore the best way to slow the spread.
To furniture
Beetles can move into furniture from infested floors. They can also arrive with second-hand pieces. Check the backs and undersides of old furniture for holes and dust. Our guide to woodworm in furniture explains how to treat a piece.
How fast does damage grow?
Damage grows with each generation, which takes several years. A small patch can become a larger one over a few seasons. The woodworm life cycle explains why.
Does it spread to new buildings?
Adults can fly short distances. However, most infestations travel by timber, such as old furniture, firewood and reclaimed beams. Take care when you buy second-hand wood. Check it for fresh dust before you bring it inside.
How urgent is treatment?
Urgency depends on the signs:
- Low urgency. Old holes, no fresh dust and dry wood.
- Medium urgency. Fresh dust or holes in one area.
- High urgency. Fresh dust in many rooms, weak timber or large oval holes in roof wood.
Even at low urgency, check the wood each spring. Read is woodworm dangerous? for how to judge the risk.
How to slow the spread
Take four practical steps:
- Fix leaks and clear air bricks so the wood dries.
- Isolate infested furniture until it is treated.
- Seal bare wood with paint or varnish.
- Inspect lofts and floors each spring.
If you find signs, request a survey to see how far the problem goes. You can also read what to do if you find woodworm.
Where you live matters, because older streets hold more old timber. See our local guides for woodworm treatment in Liverpool and woodworm treatment in Sheffield.
To go deeper, read about the common furniture beetle and the spray treatment, because the right method depends on the beetle.