Can Spiders Climb Glass? Detailed Guide!


Can Spiders Climb Glass? Most spiders have the ability to climb on different surfaces like wood, concrete walls, and even tiles! But, what about slippy surfaces like glass?

The answer is yes, they can! Spiders have special ‘setae’ on their legs that allow them to grip onto surfaces. They also use surface tension forces due to the hydrophobic nature of their setae. This means that spiders can stick and move even on non-porous surfaces like glass and metal.

With that said, it should be noted that not all species are capable of this – some spiders may struggle more than others on smooth surfaces such as glass.

However, if you want to know which species are able to climb on the glass then stick around as we will be discussing this in more detail. But first, let’s quickly go over their climbing abilities and explain how and why some spiders are such good climbers.

Spiders And Their Climbing Abilities

Spiders have an impressive array of adaptations that enable them to climb, including curved claws called tarsal claws at the end of their legs, and microscopic hairs “called setae” which act like sticky pads on their feet.

The combination of these two features is what gives spiders enough grip to climb on almost any surface. They can even walk up walls with rough surfaces like brick or wood without slipping.

On smooth surfaces such as glass and metal, they use these same features along with the aid of their webbing to gain traction and increase their grip. However, spiders that typically have trouble clinging onto smooth surfaces use their webs!

The spiders that do this will usually build webs in the corner of the window, then use it as a bridge to climb up or repel down the glass window.

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Can Spiders Climb Glass

Types Of Spiders That Can Climb On Glass

Now that you understand the basics of how spiders climb, let’s take a look at some of the species that are able to climb up glass. So, as before, not all spiders are capable of scaling smooth surfaces like glass!

In fact, only a select few species of spider have the natural ability to climb on glass. But why is that? what gives these spiders the advantage over their counterparts?

Well, there are a few exceptions, for starters, the spiders that can usually climb glass “are smaller and lighter” than other spider species. Take the tarantula for example, because of their size and weight it’s basically impossible for them to climb up glass.

But, not all large spiders share this burden. The mighty wolf spider is a perfect example of this, as it’s one of the few large spiders that have the ability to climb glass thanks to their tarsal claws.

The Daddy long legs “Pholcidae” is another good example of a large spider that can climb on slippery surfaces and is often found on windows. Other species, like the common house spider and the garden spider, can also easily scale up glass without needing any webbing.

Type of spiders that can climb on glass:

  • Wolf Spiders
  • Garden Spiders
  • Daddy-Long-Legs
  • Small House Spiders

Why Can’t All Spiders Climb On Glass?

So, if spiders have the ability to climb on a variety of surfaces, then why can’t all species scale glass? Well, this is due to the fact that some spider species are not adapted for climbing.

Many spiders rely heavily on webs and other silk structures to catch prey or build nests. As such, they don’t usually cling to smooth surfaces like glass.

Also, as mentioned, some larger species may be too heavy or not agile enough to make it up vertical surfaces such as windows or walls. In fact, the vast majority of spiders that have a body size that ranges from 2 to 10 cm, will find it difficult to climb glass.

The combination of their weight and size just makes it nearly impossible for some spiders to climb on glass. “But again” there are those that can.

How To Prevent Spiders From Climbing On Glass Windows?

Although spiders are fascinating creatures, it’s not always desirable to have them climbing on your glass surfaces. For one thing, they can be a nuisance because they will often build their webs right in front of your window.

But, even more importantly, “depending on where you live in the world” some spiders can be extremely dangerous! and the last thing you want is them making web by your windows.

So to prevent spiders from doing this your best option would be:

  • Clean The Windows Regularly
  • Use Glass Cleaner So They Can’t Climb

Using glass cleaner is a great way to prevent even the most skilled climbers from climbing on your windows. Doing this regularly will make the glass too slippery for them to gain any traction.


So yes, some spiders can climb glass surfaces just as long as they have something to grip onto. This is why it’s important to keep your glass surfaces clean and free from dirt or grime so that spiders won’t be able to scale them!

If you don’t want any unwanted guests in your home then we recommend cleaning all windows regularly with an appropriate cleaner.

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