Buying Blackout Curtains: A Practical Guide to Avoid Buyer’s Remorse

A streetlight annoyingly shining into your bedroom? Or a living room that feels like a sauna in the summer? Quality blackout curtains seem like the perfect solution. Yet, the sheer number of options is overwhelming and often leads to disappointment. Many products promise more than they deliver.

As a Product Recommendation Officer at Joybuy, I see where things go wrong every day. To help you avoid making a bad purchase, I've outlined the most common pitfalls and the key factors to consider.

The 3 Pitfalls of Choosing Blackout Curtains

1. The "Blackout" Myth: Many curtains are sold as "blackout" but only block 70-85% of light. For light sleepers or a child's room, this is often insufficient. The term isn't regulated, so you might end up with curtains that only dim the room.
2. The Empty Promise of Insulation: A curtain might block light, but that doesn't automatically mean it insulates. Thin, cheap fabrics do little to combat the cold in winter or the heat in summer, leaving you with high energy bills.
3. The "Ready-Made" Frustration: Ready-made curtains seem convenient, but choosing the wrong hanging system (grommets vs. pencil pleat) or an incorrect measurement can result in curtains that don't fit, don't glide smoothly, or look messy.

What Should You Look For? The Core Specifications

To avoid these pitfalls, focus on three concrete specifications. These determine whether a curtain truly performs its function.

1. Opacity: Dimout vs. 100% Blackout

The degree of light-blocking is the most important factor. Manufacturers often indicate this as a percentage.

• Dimout (60-85% light-blocking): Suitable for living rooms where complete darkness isn't necessary, but you want privacy and reduced light. Darker colours typically block more light than lighter ones.
• Blackout (85-95% light-blocking): A popular choice for most bedrooms. These curtains block almost all light, providing a dark environment.
• 100% Blackout: These curtains often have a special coating or an extra black interlayer. They are ideal for those who need absolute darkness, such as shift workers or parents of young children. A blackout curtain for the bedroom that is 100% blackout is the most effective solution for an undisturbed night's sleep.

2. Fabric and Structure: The Foundation of Insulating Curtains

The effectiveness of insulating curtains depends on the material and weaving technique.

• Fabric Weight: A heavier fabric, often indicated in grams per square metre (g/m?), insulates better. A weight of 230 g/m? or more is a good indicator of a quality thermal curtain.
• Triple Weave Technology: This is a weaving technique where a black, densely woven thread is processed between two other fabric layers. This structure not only blocks light very effectively but also creates an insulating air pocket. This helps keep the room cool in the summer and warm in the winter. An added benefit is that this dense structure also functions as a noise-reducing curtain, dampening ambient sound.

3. Ease of Installation: The Right Hanging System

Ready-made curtains are designed for easy installation, provided you choose the right type.

• Grommet (Eyelet) Curtains: These have metal rings at the top and are meant to be slid onto a curtain rod. They are easy to hang and create a modern, clean fold.
• Pencil Pleat Curtains: These have a tape on the back where you can insert hooks. This type is versatile and suitable for both a traditional curtain track and a rod with rings and hooks.

Always measure the width and height of your window correctly. For a beautiful drape, it's recommended to choose a total curtain width that is 1.5 to 2.5 times the width of your window or track.

Our Recommended Product Picks

Below are some products that score well on the above criteria, matched to specific living needs.

MATCH FOR: THE LIGHT SLEEPER

PONY DANCE Print 100% Blackout Curtains

Why This Fits Their Persona: Specifically designed for complete light blockage. Ideal for those who need absolute darkness for an undisturbed night's sleep, such as shift workers or for a child's room.

How It Avoids the Trap

This curtain bypasses the 'blackout' myth by offering a 100% blackout guarantee, unlike standard 'dimout' versions that still let light through.

Key Advantage & Pros

Offers 100% light blockage and also has thermal insulating properties. The subtle pattern adds style without compromising functionality.

MATCH FOR: THE ENERGY-CONSCIOUS RENTER

PONY DANCE Blackout Curtains with Eyelet (Set of 2)

Why This Fits Their Persona: A practical and affordable set that is easy to install on an existing rod. The thermal properties help to immediately reduce heating and cooling costs, which is ideal for a rental property.

How It Avoids the Trap

This curtain delivers on the promise of insulation thanks to its heavy fabric (230 g/m?) and triple-weave technology. It's more than just a piece of fabric that blocks light.

Key Advantage & Pros

Excellent value for money as a set of two panels. Certified with OEKO-TEX STANDARD 100 and made with recycled materials.

MATCH FOR: THE STYLE-CONSCIOUS HOMEOWNER

PONY DANCE Striped and Floral Velvet Curtains

Why This Fits Their Persona: For those who want to combine functionality with a luxurious, classic look. The velvet fabric and elegant pattern instantly upgrade a living room or bedroom.

How It Avoids the Trap

This curtain proves that functional curtains don't have to be boring. The heavy, luxurious velvet fabric is not just for show; it also provides effective room darkening and insulation.

Key Advantage & Pros

Luxurious velvet texture with a classic pattern. Offers excellent room darkening and thermal insulation, bringing style and function together.

Frequently Asked Questions

How do I measure the correct size for ready-made curtains?

Measure the width of the curtain track or rod (not the window itself). Multiply this measurement by 1.5 to 2.5 for the desired total width of the curtains, depending on how full you want the pleats. For the length, measure from the top of the track or rod to the desired final height (e.g., the windowsill or the floor). For grommet curtains, remember to account for the fabric that extends above the rings.

What is the difference between room darkening and 100% blackout?

"Room darkening" (or dimout) means the curtain blocks a significant amount of light, typically between 70% and 95%. A slight glow may still be visible through the fabric. "100% blackout" means the fabric itself lets no light through, often due to a special coating or a woven-in black layer. This creates a nearly completely dark room, although some light may still leak around the edges of the curtain.

Do thermal curtains really help save on energy costs?

Yes, thermal curtains can make a noticeable difference. The thick, insulating fabric acts as a barrier that reduces heat loss in the winter and keeps out solar heat in the summer. According to various studies, including those from independent energy consultants, this can lead to savings on both heating and cooling costs. The effect is greatest with single-pane or older double-glazed windows.