Defender® Opening Window Spikes

Defender® Opening Window Spikes were created because of the issues of proofing a window sill from birds, yet still needing to open the window. This window ledge spike fixes to the bottom of the actual window frame, so moves with the window when it opens. When the window is shut, the spikes sit just above the sill, deterring all birds and pigeons from perching or roosting there. Manufactured from clear plastic, the Defender® Opening Window Spike is inconspicuous when fitted to keep pigeons and seagulls off window sills.

£7.20 Per Strip (Inc VAT)

334 mm (13 inch)
Strips Required:

% Discount Strip Price
1 + £7.20 inc VAT
10 + £6.48 inc VAT
30 + £5.76 inc VAT
For trade prices call us on 01626 835055
In Stock

Defender® Opening Window Spikes Specifications:

Suitable for: Pigeons and Seagulls
Max Window Sill Depth Protection: Up to 300 mm (13 inches)
Strip Length: 333 mm (Just over 13 inches)
Base Width at Widest Point: 30 mm (1.1 inches)
Supporting Arm Length: 95 mm (3.7 inches)
Pin Height: 112 mm (4.5 inches)
Outer Pin to Outer Pin Width: 145 mm (5.7 inches)
Made from:UV Stabilised Polycarbonate
Warranty: 15 Year UK
Product Code: BIRD055
EAN: 5060298012654
Manufactured: Devon, UK

Long Life Expectancy

Defender® Opening Window Spikes are produced from a high-quality plastic that is UV stabilised. As the opening window spikes are likely to be in direct sunlight, the use of this tough plastic means they will not discolour or become brittle. With this in mind, they come with a 15-Year Warranty when installed in the UK. We recommend screwing the Defender® Opening Window Spikes to the window frame as it makes them easier to remove should the window frames require repainting or maintenance. Once any work is complete, it can just be screwed back into position without the need to repurchase the pigeon control product.

Snappable Sections

Not every window is the same size, so the Defender® Opening Window Spikes may need to be resized to fit a particular window. The supporting arms are pre-assembled when you buy the Defender® Opening Window Spikes. However, they can be carefully unclipped and repositioned along the base of the bird spike. The base itself has snappable grooves along it, so it can be made smaller to finish a run at the end of an opening window ledge or window sill.

Technical Data Sheet

If you need detailed information on the Defender® Opening Window Spikes, you can view or print the Technical Data Sheet here: Data Sheet - Defender Opening Window Spike

Defender® Opening Window Spikes

Defender® Opening Window Spikes - Key Info

What birds will the window spikes work for?

  • Pigeons
  • Seagulls

The Defender® Opening Window Spikes come as a pre-assembled unit, complete with supporting arms. They can be installed on any window frames, plastic, wooden or stainless steel, as they can be screwed or glued in place. Once installed the bird spikes will work instantly against pigeons and seagulls.

The polycarbonate spike has 4 rows of 5 pins, set at 4 different angles designed to discourage the birds from landing. The fan of pins on the Defender® Opening Window Spike can easily cover a window sill of up to 30 cm in depth and will keep pigeons off window ledges immediately. Depending on the length of your opening window, more than one strip may be required.

How do the window spikes stop pigeons and seagulls landing?

The pins themselves do not harm the birds. They simply act as a barrier and discourage the pigeons and seagulls from landing on the window ledges and window sills by making it uncomfortable for them, they will simply move on to somewhere easier to land. Defender® Opening Window Spikes are part of the Defender® range of bird control products. The whole range is humane and the bird spikes in particular are recommended by PiCAS as the best solution to stop pigeon and gull roosting problems.

Why are window spikes different to normal spikes?

Each strip of the window ledge spike is 33.4 cm long and has an integral arm at each end. These supporting arms can be screwed or glued onto an opening window frame, this means that they protect the window sill below, but the window can still function as normal and open outwards when required.

FREE Guide with all orders and telephone support

We are always happy to help with any questions you may have before or after your purchase – call us on 01626 835055. Don’t forget you will also get a handy 40-Page Bird Control Guide with every order – this has detailed health and safety tips and lots of information to help you solve your pigeon problem for good.

How to install Defender® Opening Window Spikes

How to install Defender® Opening Window Spikes - Photographic Installation Guide

Pigeons love to perch on window sills where they can look around for potential feeding spots and predators. It’s a simple job to bird proof a window ledge, but what if you have a window that opens outwards? The solution is the Defender® Opening Window Spike. This spike attaches to the actual opening window so moves with the window and sits just above the window sill when the window is closed.

Step 1 - Clean the Area: Before installation, make sure the window frames are properly cleaned. This will ensure that any silicone fixings remain strong and will also make your windows look a lot nicer! Brush any loose dirt and debris off the surface. You may need a scraper especially if there is any flaky paint that needs loosening. Finally a spray and wipe with a disinfectant such as Germ Clear™ Bird Droppings Disinfectant Spray, will get rid of the last bits of pigeon mess. Do allow the surface to dry completely before starting installation.

Step 2 - Protecting the area: With the window shut, offer up the spike to the window to ensure you have the correct position and the bird spike strip is level. This is also a good time to see if you need more than 1 strip. Along the base of the Defender® plastic bird spike are grooves that can be snapped by hand. This makes it very easy to fit the width of the window frame perfectly. The opening window arms can be repositioned along the base too. Very carefully unclip the arms from the base, snap the base to the correct size and then reattach them. Make sure the arms are attached to the correct side of the base and that they are both parallel.

Step 3 - Screwing: The window bird spike comes with 2 supporting arms ready assembled. The arms can be fixed to the outside of the window with either silicone or with screws. To use screws, mark the spots where the arms would be screwed in, the indents either side of the arms base are for this purpose. Make sure that the bird spike is level and covers the entire length of the window frame. Use 4 screws for each bird spike, 2 per supporting arm. Screw the Defender® Opening Window Spike into position and it is instantly ready to deter birds from your window sill.

Step 4 - Silicone: When using silicone, mark where the base of the arm will sit on the frame, ensuring the spike is level and covers the full length of the window. Gently detach the opening window supporting arms from the base. Apply silicone to the base of the window spike arm and then silicone in to the positions you have marked on the frame. Check that the supporting arm is facing upwards. Place something underneath to hold them in position while the silicone sets, a long piece of wood along the window sill is perfect for this. Allow the silicone 24 hours to go off. After this time, the Defender® Opening Window Spike can be reattached to the supporting arms and the piece of supportive wood removed.

High Quality Plastic Defender® Opening Window Spikes

Defender® Opening Window Spikes come with a confidence boosting 15-Year Warranty when installed in the UK. These spikes are constructed entirely of Durolon. This is a tough polycarbonate plastic that is UV stabilised, which means it does not yellow in direct sunlight, nor does it become brittle. It also can withstand extreme temperatures as a result of being positioned outside all year long. Defender® Opening Window Spikes will keep pigeons off window sills for years to come.

UK Manufactured Opening Window Spikes

Defender® Opening Window Spikes are designed and manufactured by Jones and Son Pest Control Supplies Ltd. This family run manufacturing firm is based on Dartmoor, Devon in the UK. Jones and Son take pride from the fact that all their Defender® Pigeon and Bird Products are British made from high quality materials. That's why they can confidently offer warranties on all the Defender® range of bird control products, including the Defender® Opening Window Spikes.

For full terms and conditions of the Defender® Bird Spikes UK Warranty please see our Warranty Information Page.

Order by 3 pm (Monday - Friday) for same-day despatch.

1st Class Royal Mail (1-3 Working Days) - £4.92
UPS (Trackable Courier Service) - £14.40
Orders outside of the UK Mainland – Please call us for a shipping quote.

We manufacture all our products in Devon, UK and hold vast amounts of stock. If you need a large order, we can ship it on the same working day. If you have any questions about delivery, please call us on 01626 835055 and we will be happy to help.

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