Woodworm treatment in Zaandam: is it active?
Woodworm is the larva of a wood-boring beetle; in homes it is usually the common furniture beetle. The larvae spend years tunnelling unseen through the timber, and you only see a hole, round and one to two millimetres across, when an adult beetle emerges. What matters most is telling old damage from active infestation:
- active: holes with crisp, pale edges and fresh, light-coloured bore dust (frass) beneath or trickling out;
- old: holes with dark, discoloured edges and no new dust;
- small brown beetles on the windowsill in late spring or summer;
- timber that crumbles when you prod it with a screwdriver, a sign of long-term damage.
Woodworm or house longhorn beetle?
Besides common woodworm, the house longhorn beetle can also strike. It is larger, and its larvae mainly attack softwood such as roof timbers and loft beams. Its exit holes are oval and clearly bigger than those of woodworm, and you may even hear the larvae chewing inside the wood. Because longhorn beetle can weaken load-bearing timbers, a prompt assessment is particularly important.
For common woodworm, timber that is damp, or has been for a long time, is more vulnerable. Think of floor joists above a wet crawl space, window frames with flaking paint or a shed without proper foundations. Woodworm often goes hand in hand with rot in those places, and repairing the timber is then just as important as treating it.
Our approach to woodworm
Treatment always starts with a careful inspection. We examine the affected areas, identify the beetle and check whether the infestation is still active. We also look for the underlying cause, such as damp in the crawl space or an old leak, and assess whether the wood is still sound.
If the infestation is active, we recommend a treatment that suits the type of wood, its location and the extent of the damage. For beams and floors this usually means treating the timber itself, with the product penetrating deep into the tunnels. Loose furniture often needs a different method. Where load-bearing timbers are badly weakened, have a carpenter or builder repair or replace them. That is how our pest control in Zaandam always works: cause first, then treatment.
What you can do yourself
Lay a sheet of black paper or dark plastic under the suspect area and check after a few weeks for fresh dust. It is a simple way to see whether the infestation is active. Take photos of the holes as well, so we can compare during the inspection.
- A DIY product brushed onto the surface often fails to reach larvae deep inside a beam.
- Keep the crawl space dry and well ventilated.
- Do not throw out an affected piece of furniture straight away; it can often be treated.
- Paint or varnish bare timber, so beetles find it harder to lay their eggs.
Preventing woodworm, and other damage to timber
Preventing woodworm comes down to dry, well-maintained timber. Check lofts, the crawl space and sheds now and then for holes and dust, especially in late spring and summer when the beetles emerge. Do not bring old furniture, planks or firewood indoors without looking it over carefully.
Not all damage to wood is caused by woodworm. Coarse gnaw marks on beams or cables in the crawl space are more likely the work of rodents; read more under mouse control. And if you see wasps scraping fibres off a weathered fence in summer, they are gathering material for their nest. If that nest is close to your house, see wasp nest removal.
