Wasps Around Your Guttering and Fascias? How to Find the Nest in Great Oakley

Whether the roofline is painted wood or white plastic, wasps find their way behind it, but the signs differ, and so does the sensible repair afterwards.

Two materials, two kinds of weakness

Fascia boards come in two main kinds: painted timber and plastic, usually white. Both do the same job, closing the ends of the rafters and carrying the gutter, and both can let wasps in. What differs is how they fail.

Timber tends to fail by softening. Paint cracks, water gets in, the grain swells and splits and the board ends begin to rot. Plastic tends to fail by moving. Sun and temperature make it expand and contract, joints open, clips come loose and panels bow away from the wall. A soft patch in wood or a loose join in plastic is exactly the kind of opening a founding wasp looks for.

There is no material that wasps will not use. The decision about what to fit is a matter of cost, appearance and upkeep, not of keeping wasps out, and either can be made tight with careful workmanship.

Wherever the roofline has been altered, for example when a conservatory, extension or new gutter was fitted, the joint between old and new work deserves a second look.

What to look for on timber

On a painted timber roofline, check the paint first. Flaking, bare grey patches, dark streaks and green growth all mean moisture is getting in. Look at the board ends and the corners, where water collects. A board that looks swollen, sags between brackets or has a visible crack along the grain can hide a gap.

You may also see a small, rough-edged hole, sometimes with fine wood fragments below it, where wasps have enlarged a soft spot. That is a strong hint, but only wasp traffic confirms it. Watch from a distance in the sun, and never prod the wood to test how soft it is.

If you are not sure whether a board is sound, photograph it from the ground in good light and show the picture to a carpenter. They can usually tell from the picture whether the wood needs replacing.

What to look for on plastic

Plastic boards are smooth and often look sound from a distance, so look at the joins instead. Gaps appear where two lengths meet, at the corners, at the ends beside the wall and where the board meets the soffit. Check whether the lower edge is bowing outwards, because that leaves a slot behind it. A missing clip or end cap is another weak point.

There may be no hole as such, just a thin dark line of shadow. Watching the line for wasps is the only real test. A stream of arrivals along a few centimetres of line points to the entrance.

• Open joints between lengths of board.
• Corner pieces that have slipped.
• Loose or missing end caps.
• A bowed lower edge or lifted soffit.

Older plastic can become brittle and discoloured. If a board looks yellowed or chalky, it may crack when touched, which is another reason to leave it alone until the nest has been treated.

Treat any thin slot at the top of a plastic board, where it meets the soffit, with suspicion. It is shaded, sheltered and hard to see from below.

Why neither is a reason to climb

Neither material is safe to climb next to when wasps are active. Plastic can crack under a ladder’s pressure, and wet or soft timber can give way. More importantly, either vibration or contact with the board can provoke the colony. Check from the ground, take photos and keep children and pets back.

Should someone be stung, rinse the spot with water, remove any visible sting and cool it with a cold pack. Swelling of the face, lips or throat, wheezing, dizziness or a widespread rash means a 999 call.

Wasps may disturb a roofline in late summer by chewing and enlarging the entrance. If the gap is wider than it was a few weeks ago, mention it when you ring.

Do not take it on yourself to test the board by pressing or pulling. Pushing on a loose panel shakes the cavity behind it.

What happens at the visit

The technician covering Great Oakley will find the entrance, whichever material it is in, and treat the nest at its source with suitable access equipment and protective clothing. Tell us at booking if you know the material, and whether the roofline is painted timber or plastic, because it helps us plan.

It is also worth asking whether the empty nest can be taken down. In some cases it can be reached by removing a section of board, and in others it cannot.

Technicians can work on either material, but a fragile board may need a gentler approach, so say if you know it is old, split or loose.

Repairs that suit each material

For timber, ask a carpenter to cut out soft wood, fit new sections, prime and paint, and seal the joints. For plastic, ask a roofline installer to refit loose lengths, replace damaged end caps and close open joints with matching trim. In both cases, vents should be fitted with a fine mesh.

Treatment is a fixed £90 per nest with one visit guaranteed, and each further nest on the same property costs £35 on top. Someone is on hand seven days a week, so same-day service is offered where possible. To set up a visit, call 01245 327274 or send the online booking form on the contact page and describe what you have seen.

Whichever material you have, repair soon after the wasps have gone and review the roofline every spring. Wasps start building from late April, depending on the weather, and an early check is easier than an August emergency.

Take photographs of the finished repair, so that you have a record of how the joins looked when new.

Frequently asked questions

More wasp advice for Great Oakley