Booklice are harmless to people but they point to a damp problem. Here are the signs, what they can spoil and why they are worth taking seriously.
The most obvious sign is the insects themselves: tiny pale specks moving across shelves, books, window frames or the inside of cupboards, usually in numbers. They are often noticed first in a room that has been shut up for a while, or after a spell of damp weather. A faint musty smell may go with them.
Booklice do not eat through timber, plaster or fabric. The harm is smaller but still real. They graze on mould and starch, and in doing so can mark paper, damage the surface of old book bindings and spoil wallpaper paste. They also contaminate dry foods such as flour, cereal and pet food, which should be thrown away if infested.
Booklice do not bite and are not known to spread disease. Some people with allergies or asthma find that mould and the allied insects in damp rooms make symptoms worse. If that is a concern, look to the mould and the damp as the main issue and speak to a doctor for advice.
A booklice outbreak usually points to excess humidity: condensation, a slow leak, poor ventilation or building materials still drying. Left alone, the same conditions can lead to mould spreading, decay in timber and stained ceilings, all of which are more costly to fix than the booklice themselves.
In warm, humid conditions with plenty of mould, booklice breed fast, and a few insects can become a large population within weeks. This is why the problem often seems to appear suddenly in a shut-up room, a holiday home or a newly finished building.
If you are away from a property for long periods, ask someone to check it now and then. A little ventilation and a glance inside cupboards can stop a small issue becoming a large one.
Spotting the signs early also protects insurance and resale conversations. Mould and damp left to build up are the kind of faults that surveyors pick up, so tracing them sooner rather than later is sensible, and it keeps the repair work smaller.
Where goods or records are stored, such as in warehouses, libraries and food premises, booklice may lead to contaminated stock or complaints from customers and inspectors. Regular checks and good record-keeping help to catch early signs, and businesses can ask us about commercial service contracts.
If you have noticed any of these signs, call 0113 347 0014 or message us on WhatsApp for a free quote and a survey of the problem.
They can mark paper and bindings, mostly by feeding on the mould and starch in old paste and damp paper. They do not eat through books quickly, but a long-running problem can leave stains and surface damage.
They do not bite or carry disease. Mould in damp conditions can aggravate allergies or breathing problems in some people, so the damp is the thing to deal with. See a doctor if you have symptoms that concern you.
No. They are about moisture, not cleanliness. Clean houses with condensation or new plaster can have them. Dealing with the humidity is what stops them coming back.
Tell us what you have seen and where, and we will come back to you. There are no call-out charges and surveys are free for homes and businesses.
