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How to Fit and Seal Shed Windows
Published: 25/04/2019
Whether you're assembling a new shed or replacing an old window, properly fitting and sealing shed windows is essential to keeping your building dry, secure, and weatherproof. In this guide, we’ll walk you through everything you need to know to get the job done confidently, from the tools and safety gear you’ll need, to choosing the right sealant and following a step-by-step installation process.
We’ll also cover common materials like panel pins, silicone sealant, and beading, plus offer expert tips to make sure your window stays snug and watertight for years to come. With a little care and the right products, you can create a professional-quality finish and protect your garden building from the elements.
Ready to get started? Let’s take it step by step.
Tools and Safety Gear You’ll Need
Before you get started on fitting and sealing your shed windows, it’s essential to gather the right tools and safety equipment. Not only will this make the job quicker and easier, but it will also ensure a clean, weatherproof finish that lasts.
Here’s a checklist of what you’ll need:
- Panel pins – Ideal for securing window beading in place.
- Hammer – A good quality hammer will make light work of fixing nails or panel pins.
Tiger Value Claw Hammer | Tiger Sheds
- Nails – Useful for attaching trim or reinforcing the frame.
- Sealant – Choose a high-quality waterproof sealant to prevent draughts, leaks and water ingress.
- Window beading – These strips secure the window pane and give a neat finish.
You can find many of these essential items in our garden building accessories range, all chosen to help you get the best from your Tiger Shed.
Essential Safety Gear
Don’t forget safety first! It’s easy to overlook protective equipment, but it makes all the difference when you’re working with sharp tools and heavy materials.
- Protective gloves – Essential for avoiding splinters, cuts, and sealant contact with skin.
- Safety glasses – Help protect your eyes from flying debris, especially when hammering or removing old fixtures.
- Work boots – A good idea if you’re working on uneven ground or handling heavy materials.
By having the right gear ready, you can crack on with confidence, knowing your shed windows will be fitted safely and sealed to stand up to the Great British weather.
What Sealant to Use Around Windows
Sealant plays a crucial role in protecting your shed windows from the elements. It acts as a waterproof barrier, filling gaps between the window frame and the shed structure to prevent draughts, rainwater, and moisture from sneaking in. Without the right sealant, your shed could suffer from water damage, mould, or even structural issues over time.
Types of Shed Window Sealants to Consider
When it comes to choosing a sealant, there are several options available:
- Silicone sealant: Highly flexible and waterproof, silicone is great for outdoor use and can handle temperature changes well. However, some silicone sealants don’t bond well to surfaces that will be painted later.
- Acrylic sealant: Easier to paint over and ideal for timber sheds, but it may not be as durable or weatherproof as silicone.
- Polyurethane sealant: Offers excellent adhesion and durability, making it one of the toughest sealants for exterior applications. It’s paintable and provides long-lasting protection.
Why Silicone Sealant is the Best Choice for Tiger Sheds
At Tiger Sheds, we recommend using our Professional Exterior Silicone Sealant for sealing shed windows. This premium-quality, high modulus acetoxy cure silicone contains a powerful anti-fungal compound that prevents mould and fungal growth, keeping your windows clean and protected.
Here’s why our silicone sealant stands out:
- Exceptional Weatherproofing: It forms a flexible, durable seal that expands and contracts with your shed’s timber, preventing cracks or leaks even in changing weather.
- Mould Resistance: The built-in anti-fungal properties stop mould and fungi from developing around your windows, essential for damp British climates.
- Strong Bonding: It adheres firmly to timber, glass, and metal surfaces, ensuring a reliable, long-lasting seal.
- Easy to Apply: Our silicone sealant comes complete with a heavy-duty metal gun for smooth, professional application every time.
While other sealants may suit specific needs, our silicone sealant is designed specifically for the demands of garden buildings and outdoor use, making it the ideal choice for your Tiger shed windows.
For the best finish and extended timber protection, don’t forget to use our range of quality wood paints and wood preservers alongside your sealant. These help protect your shed from rot, UV damage, and wear, keeping it looking great and weatherproof for years.
Tiger Sheds Clear Preserver | Tiger Sheds
Stone Grey Exterior Paint | Tiger Sheds
Browse our full range of sealing and wood care products in the window sealant section to find everything you need for a flawless, durable finish.
How to Install a Window in a Shed? Step-by-Step Guide to Fitting and Sealing a Window
Installing a window in your shed is simple when you follow the right process. Here’s a detailed, step-by-step guide to fitting and sealing your shed window to ensure its secure, weatherproof, and looks great.
Step 1: Apply Inner Sealant
Begin by applying a generous bead of high-quality exterior silicone sealant on the inside edge of the window frame where the glass will sit. This inner sealant acts as both a cushion and adhesive, helping to hold the glass securely while preventing moisture ingress.
Step 2: Fit the Glass Pane
Carefully place the glass pane into the frame, gently pushing it into the inner sealant. This ensures the sealant bonds firmly to the glass and holds it in position.
Step 3: Fit the Beading
Next, position the window beading around the outside edge of the window. This holds the glass in place and covers the sealant neatly. Gently tap the beading into place with a hammer, using light pressure to avoid damaging the glass.
Step 4: Secure with Panel Pins
Once the glass and beading are correctly positioned and bonded with the sealant, use panel pins to secure it mechanically. This extra fixing is important for stability and helps your window withstand outdoor weather conditions.
Step 5: Apply Outer Sealant
After pinning, apply another bead of silicone sealant around the outer edge of the glass pane. This outer sealant provides an additional waterproof barrier, sealing any small gaps and protecting against rain and drafts.
Watch Our Video Guides Below for a Visual Walkthrough
To help you get it just right, we’ve put together detailed video tutorials that demonstrates each of these steps in action. Watch these handy ‘How to’ videos after you’ve read through the guide to follow along with confidence and clarity.
How to Seal Shed Windows | Tiger Sheds
How to Install Shed Window Beading | Tiger Sheds
Fitting and sealing a shed window might seem like a small task, but when done properly, it makes a big difference to the overall durability, insulation, and appearance of your garden building. By following the correct order, applying inner sealant, fitting the glass, installing and securing the beading, and sealing the outer edge, you can be confident your shed window will stay secure and weatherproof for years to come.
To get the job done right, make sure you’re using high-quality tools and materials. At Tiger Sheds, we stock everything you need for a successful shed window installation, from professional silicone sealant to building tools and fixings and wood treatment products to protect your structure long-term.
Need more help with your garden building? Explore our full range of How-To Video Guides or speak to our expert team for friendly advice. Whether you're building from scratch or upgrading your existing shed, Tiger is here to help you every step of the way.
