Spiders in Sheds, Conservatories and Window Frames

Open the shed door on a still autumn afternoon and you will often walk face first into a web. Conservatories collect them in the roof corners, and window frames seem to grow a fresh set every week. None of this means your home is dirty.

Spiders go where there is shelter, undisturbed corners and something to eat. These three spots offer all of that, so it helps to understand why each one appeals before deciding what to do about it.

Why sheds attract so many

A shed is close to ideal spider habitat. It is dark, rarely disturbed, full of cardboard, stacked pots and old tools, and it has gaps under the door and around the eaves. Insects wander in, and the spiders follow.

Most of what you will find are common house spiders, cellar spiders with their long thin legs, and the occasional large house spider. Autumn is when you notice them most, as males roam looking for mates.

• Cardboard boxes give hiding places and are easy to swap for lidded plastic crates
• Piles of timber, pots and sacking against walls make ready-made nesting spots
• Light gaps around the door frame show you where insects get in

Conservatories: warmth, glass and light

Conservatories draw flying insects, especially in warm weather, because of the light and heat. Spiders set webs where the prey is. Check the roof bar corners, the tops of blinds, behind plant pots and along the edges of the door seals.

Dead flies on the sill are a clue. Where there are lots of small insects, there will be spiders working through them, so tackling the food supply matters as much as the spiders themselves.

Blinds and curtains deserve a look too. A blind that stays down all summer is an undisturbed corner, and egg sacs often sit in the folds. Raise and shake them out now and again, and wipe the frame edges while you are there. Small habits like these do more over a season than a single big clear-out.

Window frames and the gaps around them

Outside window frames, spiders favour the sheltered strip between the frame and the brickwork, and the underside of the sill. Weathered seals, cracked sealant and gaps around trickle vents are all easy entry points.

Webs on the outside of a frame are normal and mostly harmless. If you are seeing spiders indoors on the inside sill every few days, look for a way in rather than only brushing them away.

• Check sealant for cracks or shrinkage
• Look at the brush strips on door bottoms and letterboxes
• Check where pipes and cables pass through external walls

Sensible steps that make a difference

Regular removal of webs with a long brush or vacuum nozzle discourages spiders from settling, and it also removes egg sacs. Do this little and often, because they rebuild quickly.

Reduce clutter, keep stored items off the floor and lift stacked items occasionally. Tidy up leaf litter and dead plants hugging the walls of a shed or conservatory, since these shelter the insects that spiders feed on.

Shop-bought sprays and fogs exist, but they have limits. Spiders hide in cracks where a spray may not reach, and new ones will wander in from outside. Always read the label, keep children and pets away, and be cautious in an enclosed glass room.

When a professional visit is worth it

If you have a heavy, recurring infestation, a business premises with customers to think about, or you are not sure what kind of spider you have, an inspection helps. Essex Pest Solutions can look at what is attracting them and what is letting them in, then advise on the approach that suits the property. What is suitable depends on the building and what is found.

Frequently asked questions