How to Fit Conservatory Blinds

Installing conservatory blinds, or fitting blinds to PVCu and plastic windows, is a popular DIY job carried out by many. The method you choose depends on whether you can drill into your window frames or not.

Read on to learn the best way to fit conservatory blinds for your particular window situation.

Can You Drill and Screw into UPVC?

Yes, you can drill into UPVC windows, doors and conservatory frames, but you must be careful. Drill only in the safe areas to avoid hitting glass or damaging the frame’s seal.

Many UPVC frames have a steel-reinforced section running through the core of the item, often highlighted in red in guides or diagrams, where screws can be safely fixed.

There are a few important considerations when screwing into UPVC frames, which we cover in detail below.

Methods of Installing Conservatory Blinds

Adding blinds to a UPVC conservatory, window, or door can be done in two main ways, depending on whether you can drill into the frames or need a non-invasive solution:

Professional Installation

If you’re not confident drilling into UPVC frames or prefer a hassle-free approach, hiring a professional installer is the best option.

Installers often use kits that don’t require drilling or come with a guarantee for peace of mind.

The process usually starts with contacting the company. A representative will visit to discuss styles, colours and take precise measurements.

Blinds are then made or adjusted to fit, and an installation team will come on an agreed date to fit them correctly. This option is convenient and reliable, though it comes at a cost.

DIY Installation with a Blind Kit

For DIY enthusiasts or anyone looking to save money, installing conservatory blinds yourself is a great option.

Start by measuring your window or door to determine the correct blind size. You can then choose:

• Made-to-measure blinds: Custom-sized for a perfect, professional fit.
• Off-the-shelf blinds: Roller or venetian styles that can be trimmed to fit, though precision is key to avoid visible mistakes.

Most blind kits include all necessary fittings, making self-installation straightforward once measurements and adjustments are complete.

Fitting UPVC Blinds Without Drilling

If you can’t drill into your UPVC conservatory or window frames, “no-drill” or “drill-free” blinds are a simple solution.

These blinds usually use small brackets that slip under the rubber frame seal. The blind then clips securely into the brackets without any screws.

Designs vary by manufacturer, but most operate the same way and are quick and easy to fit, making them ideal for renters or anyone avoiding frame damage.

Am I Allowed to Drill into my PVC Window Frames?

Many homeowners wonder if it’s safe to drill into PVC window or conservatory frames. The answer depends on your installation, contract terms, and any guarantees provided by the manufacturer or installer. If your installer is FENSA-registered, their guidelines may also apply.

Be cautious: some long-term warranties offered by window companies may only cover manufacturing defects or discoloration. Drilling into the frame could void these warranties, as inspections for claims are often thorough.

Before drilling, contact the company that fitted your windows or built your conservatory and any insurance-backed warranty providers, to confirm it’s allowed. Always get written confirmation to avoid disputes.

For a risk-free alternative, consider “Perfect Fit” blinds or other no-drill options, which fit neatly without affecting your frames.

How to Measure Conservatory Windows for Blinds

Accurate measuring is essential when fitting conservatory blinds, as even small errors can lead to poor fitting and wasted money.

If you use a specialist installer, they will take responsibility for all measurements. However, if you’re measuring yourself, any mistakes will be your responsibility, so take your time and follow your supplier’s guidance exactly.

Your measurements depend on how much area you want the blind to cover. For an inside recess fit, measure from bead to bead (the inner edges of the frame). For an outside recess fit, measure the full wall or PVC section around the windows.

For inside recess blinds, measure the width in three places (top, middle, bottom) and the drop in three places (left, centre, right). Always use the smallest measurements to ensure the blind fits neatly without catching.

If you want the blind to cover the full window or door, measure the outside recess. This is your inside recess size plus around 12–14cm added to both the width and drop, giving 6–7cm overlap on each side for better light control and privacy. As before, take measurements in three places for both width and height and note them down.

Most modern conservatories are built by joining UPVC units together, meaning there is often no traditional wall recess between windows.

Older or brick-built conservatories may have a standard recessed opening, similar to a normal house window.

With UPVC-only systems, the outside recess is the PVC frame around the glass, while the inside recess is measured bead to bead across the glass area.

If fitting roller blinds, remember the roller and brackets add extra width, usually around 38–40mm more than the fabric. This is especially important for inside recess fitting, where space is limited.

Types of Conservatory Blinds

There are many types of conservatory blinds available, and while fixing methods can vary slightly between brands, most DIY blind kits follow the same basic installation principles.

Conservatories also come in several styles, such as Lean-To, Victorian and Edwardian. Although designs differ, they are usually built from similar materials and fitted in much the same way, so blind fitting is largely universal.

Most conservatory blinds are chosen based on size and the amount of glass they need to cover. Some are designed to span whole window sections, while modern systems often fit individual panes, giving you full control over light and privacy. This means nearly all blind styles can be installed in almost any conservatory.

It’s also worth noting that specialist blinds are available for roof panels and Velux-style windows, not just vertical glazing.

The main styles of conservatory blind include:

Venetian Conservatory Blinds

Venetian conservatory blinds are usually made from aluminium, wood or PVC, but aluminium is by far the best option for conservatories.

Because conservatories experience extreme temperature changes, PVC can warp or soften, while wooden blinds can twist and crack over time. Aluminium blinds are heat-resistant, stable and far more durable in these conditions.

They are a popular choice as they offer excellent light control, good privacy even when partially open, resist fading from sunlight, help reflect heat and are affordable, making them ideal for practical, long-term conservatory use.

Vertical Conservatory Blinds

Vertical conservatory blinds are one of the most popular and practical options for large glass areas. They offer excellent control over light and privacy thanks to adjustable slats and simple pull-cord controls.

The main downside is that fabric slats can fade over time in strong sunlight, but the advantage is that individual vertical strips are inexpensive and easy to replace, making them a cost-effective long-term solution.

Roller Conservatory Blinds

Roller blinds are a popular choice for conservatories. They can cover a full wall with a single blind or be fitted to individual panes for more precise light control. Lightweight design means they put minimal strain on fixings or PVC frames.

The main drawback is fading from sunlight, which can be uneven if partially lowered. They can also attract insects, which can get trapped when rolling the blind up, creating a mess. Despite this, they remain a practical and flexible option for light management and privacy.

Roman Conservatory Blinds

Roman blinds offer a stylish, tailored look but can be costly, especially made-to-measure. You can also buy just the header with controls and make your own.

When raised, they still cover part of the glass, limiting your view. Large areas are prone to fading from sunlight. Blackout versions are heavier, which can strain fixings and PVC frames, so extra care is needed during installation.

Perfect Fit Conservatory Blinds

Perfect Fit blinds (and similar variants from other manufacturers) are a game-changer for DIYers. They allow you to fit blinds to PVC or plastic frames without drilling or screwing, preserving guarantees and avoiding frame damage.

Available in a wide range of styles and colours, these blinds suit almost any window or conservatory. Installation is quick and simple: slide the special brackets (usually four) into the existing window beads, clip the blind in place and you’re done—no drilling, screwing or adhesives needed.

The design ensures no gaps along the sides, prevents tangled strings and keeps pleats aligned perfectly, giving a clean, professional finish. Since their launch, many manufacturers have adopted similar easy-fit systems, making them the go-to solution for hassle-free conservatory blinds.

Tools and Products Needed for Fitting Conservatory Blinds

The tools and materials you’ll need depend on the type of blind you’re installing. In most cases, you’ll typically require the following essentials:

• Tape measure
• Spirit level
• Pen/pencil
• Drill/driver
• Selection of drill bits
• Chosen blind and fitting kit
• Pair of scissors
• Hacksaw – If you need to cut aluminium roller for roller blind

How to Fit Conservatory Blinds

Installing conservatory blinds varies slightly depending on the manufacturer, conservatory style and blind type, but the core steps are generally the same.

The most important point is to ensure the blind is level so it hangs straight. Decide whether to face fix (attach to the window frame) or top fix (attach to the lintel). Your blind’s instructions will guide you on the best method and assembly steps.

Fixing Conservatory Blinds to a Solid Surface

When top fixing blinds to an inside or outside recess near the edge, you may need to drill into a lintel. These are tough, so use a strong drill and sharp bits.

For a detailed guide, see our Venetian, Roman, and Vertical blinds project.

In summary, the process is as follows:

• Step 1 – Find the Centre: Measure the window recess and blind, then mark the centre points.
• Step 2 – Mark Brackets: Position brackets on the blind, level with a spirit level, and mark the fixing holes.
• Step 3 – Fix Brackets: Drill 6mm holes, insert wall plugs and screw brackets securely.
• Step 4 – Attach Blind: Insert the blind into the brackets and secure it in place.
• Step 5 – Test: Fully extend and retract the blind to ensure it hangs straight and covers the window evenly.

Fixing and Drilling Conservatory Blinds to UPVC Frames

Drilling into UPVC frames may seem daunting, but with care, it’s safe and straightforward.

The key is to avoid the glass. Drilling into glass can shatter the pane, requiring a full replacement.

Typically, the glass sits just inside the frame, extending only 10–15mm past the outside edge of the bead—the black strip around the glass that holds it in place and allows easy removal if needed.

In the image below, you can see a cross-section of a UPVC unit. While this shows an opening window, fixed units are constructed similarly, so the same precautions apply.

Step 1 – Position and Drill the Bracket

Locate the ideal bracket position as shown above. This spot secures the blind through three sections of the UPVC frame and into the metal reinforcement inside, giving a strong, stable mount.

Hold the bracket in place and mark the top fixing hole with a pencil. Using a 3mm drill bit, drill carefully into the mark. Let the drill do the work, don’t force it, or the frame could crack.

Step 2 – Secure the Bracket

Follow these steps to fix the bracket safely:

• Place the bracket over the first hole and insert a screw. Tighten lightly, just enough to hold it.
• Use a spirit level to make sure the bracket is perfectly vertical, then mark the second hole.
• Remove the bracket, drill the second hole, then reattach the bracket and fully tighten both screws.

Top-fixing tips:

• Check the blind will hang clear of handles or catches so it moves freely.
• Use the correct screw size. Forcing oversized screws can crack or split the frame.

Step 3 – Fit the Opposite Bracket

Next, secure the bracket on the other side:

• Attach the blind carriage to the first bracket, then position the second bracket at the opposite end. Use a spirit level across both brackets to ensure it’s perfectly horizontal. Mark the top fixing hole on the frame.
• Remove the carriage and bracket, drill the top hole, replace the bracket, and insert the first screw. Mark and drill the bottom hole, then fully secure the bracket with both screws.

Step 4 – Attach the Blind Carriage

Finally, clip the blind into the two brackets. Follow the manufacturer’s instructions, as the method may vary by type or brand.

Once fitted, fully open and close the blind to check it hangs straight, operates smoothly and is level. If everything works, your installation is complete, well done!

Installing Perfect Fit or No-Drill Conservatory Blinds

Perfect Fit and no-drill blinds are the simplest to install and give the cleanest, most professional look, making them a popular choice for conservatories.

Step 1 – Measure and Order Your Blinds

Accurate measurements are crucial for a perfect blind fit. Follow the manufacturer’s instructions carefully, as any errors will affect the final result. If unsure, contact the supplier for guidance.

Once measured, submit your dimensions and wait for your new blinds to arrive ready for installation.

Step 2 – Unpack and Assemble Your Blind

Carefully unpack your blind and lay the parts on a protective surface to avoid scratches. Arrange the components as they will sit on the window.

If assembly is required, follow the manufacturer’s instructions to connect the pieces and secure the frame.

Step 3 – Fit Brackets to the Window

The number of brackets depends on your blind, usually 4–6. To position them correctly, use a credit card as a spacer. Place it against the top corner of the window pane, next to the rubber beading, to mark the bracket height.

Slide the bracket lip under the rubber seal, using a little soapy water if needed to ease it in without damaging the seal. Repeat for all remaining brackets.

Step 4 – Attach the Blind to the Brackets

With the brackets in place, slide the blind into position and push it onto each bracket. You should hear a click as it locks securely.

Check that all brackets are fully engaged, then test the blind to ensure it opens and closes smoothly and hangs straight.

Installing blinds in your conservatory is essential for privacy, light control and even reducing heat. There are several styles and options available, so you can choose the best fit for your space, needs and also your design tastes.