How do you treat woodworm in furniture in Ireland?

You spot a little pile of fine dust next to the leg of that old dresser you picked up at a market, or maybe you notice a scatter of tiny round holes in the side of a bookshelf that has been in the family for years. The first thought is usually panic. You picture your favorite pieces turning to powder overnight while an army of invisible bugs chews through your living room.

In Ireland, when people talk about woodworm, they are almost always looking at the common furniture beetle. It is not actually a worm. It is the larval stage of a small brown beetle that spends years tunneling quietly through timber before chewing its way out into the open air. The adults emerge between April and August, mate, and promptly lay eggs back in the cracks of the wood or inside their old exit tunnels.

The damage you see on the surface is really just the final chapter of a long story. The grubs have been munching away on the cellulose deep inside the timber for anywhere from one to five years. If the wood is dry and your house is well-heated, they struggle to survive. But older homes with fluctuating dampness or unheated rooms give these pests an ideal environment to settle in and multiply.

Before you buy any treatments or start ripping drawers apart, you need to figure out whether the bugs are actually still at home. Lots of antique furniture has old flight holes that were abandoned decades ago. If the wood has been treated or the environment became too dry, the pests died out long before you bought the piece.

Start by checking the texture of the dust beneath the holes. Rub a little between your fingers. If it feels gritty like fine sand and contains tiny, lemon-shaped pellets, you are usually dealing with the common furniture beetle. If the powder feels as smooth as baking flour, you likely have a different pest entirely, such as a powderpost beetle.

Next, look at the size of the holes. Active furniture beetles leave behind circular openings that measure 1.5 to 2 mm across, which is roughly the size of a standard ballpoint pen tip. You can test for activity by taping a piece of white paper beneath the furniture during spring or summer, or by sealing the holes with a bit of wax or paper tape. If fresh, gritty dust piles up on the paper or new holes break through your seals a few months later, the infestation is active and needs attention.

Once you confirm the bugs are active, your next move depends entirely on the finish of the wood. This is where most people make a costly mistake by heading to the hardware store for a spray can without checking what is on their furniture.

If the wood is raw, bare, or sanded down, you can use liquid surface treatments like borates or pyrethroids. These soak into the fibers. Borates act as a stomach poison to the larvae inside, while pyrethroids leave a barrier that stops emerging adults or new hatchlings. You just brush or spray it on until the timber is wet and let it dry.

However, if your furniture is painted, varnished, waxed, or polished, liquid sprays are useless. The finish creates an impenetrable barrier that keeps the chemicals sitting on the surface, where they do nothing except make a sticky mess. You cannot spray your way through a heavy coat of polyurethane or old French polish.

For finished or antique pieces, you have to look at non-chemical methods. One reliable approach is wrapping the piece tightly in polyethylene plastic and placing it in a deep freezer that sits at zero degrees Fahrenheit or lower. You leave it there for at least forty-eight hours to a week, depending on how thick the wood is.

The trick with freezing is leaving the plastic sealed until the furniture warms back up to room temperature. If you unwrap it while it is still freezing cold, condensation will form all over the wood and ruin your polish or cause water marks.

There are moments when a DIY approach is simply not enough and you need to step back. If the woodworm has moved out of the moveable furniture and into your floorboards, roof timbers, or structural joists, surface sprays and home freezers will not cut it. Widespread structural damage requires a professional timber assessment to check whether load-bearing beams have lost their strength.

You should also hand the problem over to a specialist if you are dealing with high-value museum pieces, delicate marquetry, or complex antiques that cannot handle extreme temperatures or harsh chemicals without falling apart. Professional conservators use specialized chambers with controlled nitrogen or carbon dioxide atmospheres to clear out pests safely without damaging antique glues or delicate veneers.

Never try to handle commercial gas fumigation yourself. Professional pest control operators use restricted gases that require strict safety equipment and licensing. If the damage looks extensive enough that a chair leg crumbles in your hand or a floorboard feels spongy underfoot, call in a licensed timber specialist to evaluate the structure before someone gets hurt.