This guide reveals the species of solitary white spider in the house that you come across out of nowhere.
You’ll find out what this spider is and how it enters your home.
Plus, you’ll also learn the seven steps to get rid of this white spider in the house safely and quickly.
Yellow Sac Spider – The Big White Spider In The House
The white spiders in the house are the yellow sac spiders. But these spiders are not your common house spiders.
The yellow sac spider is an outdoor spider that lives under foliage, shrubs, underneath woods, rocks, and tree barks. It’s an indigenous spider species of the United States.
When the temperature drops during the late fall, the yellow sac spider sneaks inside homes looking for warm places to hide.
Inside your home, you’ll see yellow sac spiders crawling or remaining idle at the ceiling and the wall.
But their favorite places to hide inside homes are cluttered places that receive little to no light and footfalls.
Most outdoor spiders, like the black widow spider, brown recluse spider, hobo spider, wolf spider, and jumping spiders, prefer to hide in cluttered spaces inside the homes.
Identifying Yellow Sac Spiders
Yellow sac spiders are easy to spot inside your home and outdoors. These spiders have long legs with front legs longer than the hind legs.
But many people confuse them with daddy-longlegs. Daddy-longlegs, also known as cellar spiders, are thinner and darker than the yellow sac spiders.
The endings of the legs of a yellow sac spider have bristles of hair. It helps them to grip the surface while climbing vertically.
These hairy bristles make the legs’ ends appear black. And they’re known as tarsi.
Typically, the yellow sac spider isn’t always yellow. It can be white, tan, brownish, and sometimes even greenish too. The pigmentation is dark in the middle of the abdomen and head.
Experts believe that the color of the yellow sac spider may depend on the color of the insect that they hunt and eat.
The distinctive feature of the yellow spider is the vertical mark on the abdomen. In some, this mark is longer and goes up to the spider’s cephalothorax.
A fully matured adult yellow sac spider grows from ¼ inches to 3/8 inches in size.
Yellow sac spiders got their name from their nesting habit. Outdoors, these spiders will roll the leaves and build a sac for their retreat.
Inside the home, yellow sac spiders might not build their retreats because they don’t have the leaves available. That makes them use the cracks and gaps on the walls to spin silken retreats.
Yellow sac spiders are nocturnal. They’re active hunters during the night.
The yellow sac spiders stalk and ambush to hunt their prey.
They don’t spin webs to trap their prey. They only spin webs to relax and spend their day.
Yellow sac spiders are not strictly carnivores. They feed on the flower nectars too.
Do Yellow Sac Spiders Bite? Are They Poisonous?
Like most spiders that sneak inside homes, yellow sac spiders are harmless. But they can bite in the rarest of occasions.
Bites can occur when yellow sac spiders get pressed against human skin. They can also turn aggressive if they feel threatened or cornered.
The bites from yellow sac spiders are painful. It feels like a sting.
Yellow sac spiders bite humans more than any other species of spider. Yellow sac spiders are venomous too.
However, the venom in the yellow sac spider isn’t as strong as the venom in the brown recluse bite.
Bites from the brown recluse spider can cause skin necrosis. In contrast, the yellow sac spider bite won’t.
If a yellow sac spider bites you, you’ll have a burning sensation on the bite wound that can last for 1-10 hours.
Rashes, swelling, and blisters can also appear on the bitten wound. Sensitive people allergic to bug bites can show symptoms like fever, nausea, cramps, and vomiting too.
These symptoms are like the black widow spider bite symptoms.
As per Washington State University, “Use some ice on the bite wound immediately. If you’re showing symptoms like nausea and fever, then seek immediate medical attention.”
How Do Yellow Sac Spiders Get Inside The Home?
Yellow sac spiders sneak inside homes to escape cold weather outdoors. That’s why the most common period when yellow sac spiders enter homes is during the fall months.
Yellow sac spiders can also get inside cars looking for a warmer place to hide.
They will spend the winters and may move out when spring arrives.
Yellow sac spiders will enter through the cracks on the windowsill, window frames, doors, and walls.
The thin gap between the door and floor is wide enough for the spiders to crawl inside your home.
Inside your home, yellow sac spiders will hide in the wall voids, underneath furniture, in the cluttered food pantry and kitchen cabinets, and strange places like behind photo frames.
However, their favorite hiding places are cluttered places that are dark and don’t have many human visitors.
Multiple yellow sac spiders can sneak inside your home, and yes, these spiders can also live in groups.
Places like the attic, cellar, basement, storage rooms, and even bedrooms with clutter are ideal places for the yellow sac spiders to hide.
These places, if not maintained well, become home to many bugs. Bugs in homes also play a role in attracting spiders in homes because spiders hunt them for food.
The presence of female spiders inside the home draws male spiders. After mating, the female spiders will lay eggs in silk egg sacs.
Female spiders will hide these egg sacs in the thin gaps and cracks on the walls. Each egg sac contains multiple eggs.
On hatching, tiny spiderlings come out of these egg sacs. These little spiders look like small white spiders.
If a yellow sac spider, or any other spider species, hides in your bedroom, then they can lay eggs there too.
Gaps in the bed frame, headboards, and bedroom furniture are ideal for spiders to lay eggs and hide their egg sacs.
They can also hide their egg sacs underneath the bed and in the bed storage section if both are cluttered.
When these eggs hatch, you’ll see little spiders in your bed. These tiny spiders in the bed are the spiderlings.
But these tiny spiders are harmless. They have underdeveloped fangs and jaws. So, they can’t bite.
How To Get Rid Of Yellow Sac Spiders In The House?
Now that you know the white spider in the house is a yellow sac spider and how it gets inside a home, it’s time to find out how to get rid of yellow sac spiders in the house.
Follow the seven steps below to get rid of yellow sac spiders in the house. There are also preventive measures that will stop them from entering your home in the future.
Step#1 – Seal Gaps And Cracks On The Walls, Windowsills, And Door Frames
Yellow sac spiders, or any outdoor spider like the hobo spiders, brown recluse spiders, and the black widow spiders, sneak inside homes through cracks and vents.
So, before you even think of using any insecticide sprays, your first job should be to seal those points of entry.
Check for crevices and holes on the windowsills, door frames, walls facing your yard, roofs, etc.
If there are any, then seal those gaps. Using a silicone-based sealant is a wise move to caulk these cracks. These sealants are robust, last for a decade, and bugs can’t chew through them.
However, if there are severe damages in these places, it’s because of excessive moisture or termites. Replacing the windowsills and door frames will be the right thing to do.
Moisture can also damage the exterior walls. So, check for the damages on the walls and repair them if they need it.
Use weather strips to close the gaps between doors and windows. Bugs and spiders can crawl through these gaps. So, covering those gaps will not let bugs crawl through them.
Step#2 – Clean Your Yard
Let’s face it. Your yard is the source of most insects and spiders invading your home.
Your yard has debris, leaf litter, woodpiles, bushes, shrubs, and mulch beds where most spiders and bugs hide.
So, keep your yard clean. Get rid of any wastes lying around in your yard and decaying.
Check underneath the plant pots and rocks for any bugs and spiders.
If you find any, use one of the sprays on them that we’ll recommend in the next step.
Dirty trash bins in the yard with rotting wastes become the source of many bugs. These bugs attract spiders.
So, clean the trash bins. Ensure that you dispose of the trash in the bins regularly.
Step#3 – Spray A Spider Killer Spray Outdoors
After sealing the cracks and cleaning your yard, now it’s time to use insecticide spray.
Use the insecticide spray on the perimeter of your home, underneath the stones, and woodpiles.
We recommend Miss Muffet’s Revenge Spider Killer.
It’s a reliable spider killer and deterrent. And you can use it both indoors and outdoors.
In case if you need a natural organic spray, then Natural Armor Spider Killer and Repellent Spray work well.
No matter which sprays you choose, keep in mind that these are not instant spider killers.
The best part is that both these sprays have residual toxicity that lasts for a long. And hence you wouldn’t need to use these sprays daily.
Please do read the safety instructions on the label and take appropriate precautions. Also, keep them away from children and pets.
Step#4 – Clean The Clutter Inside Your Home
Now that you’ve taken care of the outdoors and their points of entry, it’s time to move indoors.
As you know, cluttered places are hiding places for spiders.
And any room in your home, including your bedroom, can be a hiding place for yellow sac spiders if there’s too much clutter.
Closets can also be hiding places for spiders because it provides the warmth they need during the fall and winter months.
So, de-clutter your home. Get rid of any useless things in your attic, basement, and garage.
Cardboard boxes, old books, and paper piles are some of the places where spiders can hide. If there are any of these lying around, and you don’t need them, get rid of them.
Keeping attics, basements, and garage, de-cluttered and clean, denies hiding places to spiders. These are the places where many bugs hide too.
So, keeping them clean and de-cluttered will deny spiders the food they need.
Words Of Caution: While cleaning you may encounter hiding spiders. The spiders will feel threatened and will turn aggressive.
That can end up in a spider bite which you don’t want. Hence, wear shoes, gloves, and full sleeve shirt, and trousers tucked inside your socks while cleaning places like the attic, garage, and basement.
Step#5 – Repair The Gaps And Cracks On The Walls
Crevices and gaps in the indoor walls are hiding places for spiders. The yellow sac spider can squeeze their bodies, slide into these gaps, and hide.
So, repair these gaps.
Step#6 – Keep Spider Traps To Catch Any Hiding Yellow Sac Spider
Spiders are sneaky creatures. They’re shy and avoid human contact.
So, while you’re doing your due diligence to get rid of them, some of them may run away and hide deeper inside your home.
And the solution to this problem is spider traps.
There are various spider traps available, including poisonous ones and sticky ones.
You can use any of them. However, the trick is to keep the traps at places where you’ve got the maximum chances of catching the spiders.
So, keep these traps in the attic, basement, garage, and bedroom. Some spiders crawl along the baseboards of the floor.
So, keeping a few traps along the baseboards increases your chances of catching the spiders.
Another trick you can use is to keep a bug like a cricket, which spiders eat, on the sticky traps.
That will lure the spider out of hiding. And when the spider is on the trap, immediately put a glass jar on the spider to trap.
You’ll need to keep the spider traps for a week till you’re sure you’ve caught all the hiding spiders inside your home.
Step#7 – Use Natural Scents That Keep Spiders Away
Using smells that keep spiders away is a preventive follow-up step that you can use after you’re through with the last six steps.
Spiders hate the smell of vinegar, eucalyptus, and peppermint. So, spraying sprays like peppermint spray is a great defensive measure to stop spiders from re-entering your home.
And it’ll also repel any spiders hiding inside your and drive them out. But remember, peppermint spray doesn’t kill spiders. It repels them.
For better results, use the spray on all corners of your home including the places where spiders can hide. You can use it outdoors too to prevent spiders from hiding in your yard.
How To Catch Spiders On The Walls And Ceilings?
Many of our readers asked, how to catch and dispose of spiders.
We don’t recommend using bare hands, even hands with gloves on, to handle spiders.
Instead, you can use the spider catcher.
The spider catcher has a long handle. It also has a collapsible front end that traps spiders.
To use it correctly, position the catcher on the spider. Then squeeze the handle to open the trap.
The trap in the front is plastic bristles that collapse on the spider when you release the handle.
Now release the handle on the spider. The bristles will catch the spider.
Take the spider catcher outdoors with a spider trapped in the bristles and dispose of the spider.
The catcher is safe, keeps you at a safe distance from the spider, and anyone can use it. You can even catch scorpions with the spider catcher.
When To Call A Pest Controller To Get Rid Of Yellow Sac Spiders And Other Spiders Inside Your Home?
If you’re too scared of spiders and don’t want to go anywhere near them, then using professional pest control is the right approach for you.
Plus, if there’s a reappearance of spiders inside your home, especially during the fall months, then there’s a source of spider infestation. It will need experienced hands and eyes.
In that case, you can hire a pest controller too.
But spiders are harmless and, as we said earlier, they’re shy. So, you can live with them even without knowing that there are spiders inside your home.
Tiny White Spiders In The House (These Are Not Spiders)
Though you can come across spiders in your home in the summer, there are tiny white and clear spider look-alikes that also infest homes in the same period.
These are also arachnids. It means that they belong to the same family as spiders do.
But these tiny white clear spiders are not spiders. They’re spider mites.
On top of being white, spider mites can be orangish, reddish, and yellowish.
Spiderlings, or baby spiders, that hatch out from the spider eggs are a bit bigger than the spider mites.
Spider mites are tiny white plant bugs that damage and destroy plant leaves. They also spin tiny webs underneath the plant’s leaves.
Spider mites damage on plants is marked by the discoloration and holes on the leaves and stems of the plants.
Unless you get rid of spider mites on plants, the leaves wither off and the plants may die too.
Do spider mites enter your home? Yes, they do.
When you bring in potted plants with spider mites in them, you introduce the spider mites to your home.
As spider mites are tiny, they can be hard to spot at the early stages of spider mites infestation.
Soon, their numbers grow, and they can spread all over your home.
That’s when you can see them in places like your bedroom and even in the kitchen.
But these tiny spider look-alikes don’t bite humans and pets.
The white spiders in the house are yellow sac spiders. In the fall months, yellow sac spiders can sneak inside homes looking for a warmer place to live.
Like the mites, spiders are arachnids. Many species of spiders live outdoors, can enter homes. And yellow sac spiders are one of them.
This guide reveals the risks of yellow sacs spiders inside your home and how to get rid of them.
There can be multiple yellow sac spiders inside the home. The presence of one yellow sac spider can indicate that there are others.
We’re Mark and Jim. We were serial pest killers for almost all of our lives. Through this blog we spread pest murdering tips to people like you who want to keep their homes pest free.