In short
Bed bugs often move into a sofa when someone has been sleeping or napping on it. Look along seams, under cushions, inside zips and along the wooden frame underneath. A sofa can usually be saved with heat or a spray and steam treatment, but a cheap, heavily infested one may not be worth it. Never carry an infested sofa through shared areas without wrapping it first.
In this guide
Most people think of bed bugs as a mattress problem, but sofas come a close second. In a small flat or a student house where the lounge doubles as a spare room, the sofa is often where an infestation spreads to next. Here is how to check one, what treatment involves, and how to decide whether it is worth keeping.
Why bed bugs end up in sofas
Bed bugs live close to where people rest for long periods. That is usually the bed, but anyone who falls asleep on the sofa most evenings, or moves there to escape bites in the bedroom, gives the bugs a second place to feed. Within a few weeks, a sofa used like that can have its own population.
Second-hand sofas are the other common route. A sofa picked up cheaply, found on the street or left by a previous tenant can bring bugs into a home that never had them.
Where to look
Bed bugs prefer tight, dark, fabric-lined gaps. On a sofa, check:
- the seams and piping along the edges of every cushion, inside and out
- inside cushion zips, and the foam inside if the covers come off
- the crease where the seat meets the back and arms
- under the sofa, along the wooden frame and where the fabric is stapled to it
- the cloth lining on the underside, especially if it is torn
- any recliner mechanism or sofa bed frame
Use a bright torch and a thin card to slide along seams. You are looking for live bugs (flat, oval, reddish-brown, up to about 5mm), pale shed skins, tiny white eggs, and dark spots of droppings that smear when wiped with a damp cloth.
Why sofas are harder to treat than beds
A mattress has a few seams and can be sealed in an encasement. A sofa has a frame full of joints, staples and hollow spaces, layers of foam and fabric, and a lining that hides the underside. Insecticide sprays reach the surfaces but not always the gaps inside the frame, and steam reaches only a few centimetres in.
That is why sofas are one of the main reasons a spray course fails, and one of the main reasons people choose heat treatment.
Treatment options
Spray and steam
A technician steams the seams and joints, then applies a residual insecticide to the frame, the underside and the places bugs hide. It works well on a sofa that is lightly infested and has a simple frame, as part of a whole-room treatment. Expect two or three visits about two weeks apart, like any spray course.
Heat
A heat treatment raises the whole room, sofa included, above the temperature that kills bed bugs and their eggs, and holds it there. Technicians put probes inside the cushions and the frame so they know the heat has reached the middle. It deals with a sofa in one visit and is often the most reliable option for upholstered furniture. The British Pest Control Association sets the targets professionals work to.
What not to do
Do not soak the sofa in shop-bought spray. It rarely reaches the bugs inside the frame, and it can drive them into the walls or the next room. The NHS advises using a pest control service rather than tackling bed bugs yourself.
Keep it or get rid of it?
Most sofas can be saved. It is usually worth keeping one when:
- it is in good condition and would be expensive to replace
- the infestation is light, with only a few signs in the seams
- the whole room is being treated anyway, so the sofa costs little extra
Getting rid of it can make sense when:
- the sofa is cheap or worn, and torn linings and broken frames give bugs too many hiding places
- it is heavily infested, with droppings throughout the frame
- it is a sofa bed or recliner with a complicated mechanism that cannot be treated properly
If you do throw it out, do it after treatment or with the technician’s advice, not before. Wrap it completely in heavy plastic sheeting and tape it shut before it leaves the room, carry it straight out, and mark it clearly so that nobody takes it home. In a block of flats, ask the building manager how bulky waste should go, because dragging an unwrapped sofa through corridors and lifts is a common way bugs reach other flats. Manchester City Council runs a bulky waste collection service that can take it away.
Replacing the sofa before the room is treated is a waste of money. The new one will be colonised from the floor, skirting and walls within weeks.
After treatment
Use the sofa as normal once the technician says the room is safe. Check the seams every week or so for a couple of months. If you see fresh signs, tell the technician straight away, because most treatments include a return visit within a set period.
If you are in Manchester and have bugs in a sofa as well as a bed, a Manchester bed bug treatment quote will normally cover both, and our cost calculator shows typical prices with steam added.