140x245cm Blackout Curtains: The Ultimate Buyer's Guide

A bedroom flooded with light at dawn? Glare ruining your favourite show? Energy bills skyrocketing in both summer and winter? Choosing the right curtains is a crucial step to improving your daily comfort. The 140x245cm blackout curtain is the quintessential standard size, compatible with the majority of windows.

As the Home category expert at Joybuy, my mission is to help you see things more clearly. Free from marketing jargon, this guide gets straight to the point: giving you the keys to choosing a curtain that is both practical and stylish. We'll review the essential criteria before presenting our selection of the best models.

How to Choose the Right Blackout Curtains?

Before you take the plunge, a few technical specifications can make all the difference. Here are three key points to check to ensure you make the right choice.

1. Blackout Performance and Fabric Quality

Be aware that not all "blackout" curtains are created equal. Their effectiveness depends directly on the weaving technique and the density of the fabric.

• Triple-Weave Technology: This is the gold standard. The technique involves sandwiching a layer of black yarn between two other layers of fabric. The result is an effective barrier that blocks 85% to 95% of light and UV rays.
• Fabric Weight (g/m²): A high grammage (above 200 g/m²) is a true hallmark of quality. Not only will the curtain's drape be more elegant, but its insulating properties will also be enhanced.

Not to be confused with a simple light-filtering curtain, which merely filters light to create a soft ambiance without achieving complete darkness.

2. Thermal and Sound Insulation: A Dual Benefit

A good blackout curtain does more than just block light. Thanks to its density, it provides an additional barrier against the elements. This is the principle behind the thermal and acoustic curtain.

• Thermal Insulation: In summer, it blocks the sun's heat to keep your interior cool. In winter, this insulating curtain for both cold and heat limits heat loss near windows. The payoff: real savings on your energy bill.
• Sound Insulation: While it won't replace wall insulation, a thick curtain absorbs a portion of external noise (traffic, neighbours). It's ideal for creating a peaceful sanctuary in a bedroom and promoting restful sleep.

3. Hanging Style: Grommets or Pencil Pleat?

The choice of hanging style has a dual impact: on the aesthetic finish, but also on the ease of installation and compatibility with your curtain rod.

• The grommet-top curtain: This is the simplest and quickest option. You just slide the curtain rod through the metal rings. It ensures a perfect drape with regular, modern waves, making it a top choice for a contemporary living room.
• The pencil pleat curtain (or ruffle tape): More technical but highly versatile, it adapts to all systems, whether it's a track rail (with hooks) or a classic rod. It allows you to create pleats to adjust the width and achieve a more customised style, from classic to contemporary.

Our Top Picks for 140x245cm Blackout Curtains

We have selected three models for you that check all the boxes, all available as a set of 2 panels, perfect for a standard window.

1. PONY DANCE Silver Geometric Pattern Blackout Curtains

Why it stands out: This model successfully combines design and performance. Its geometric pattern with silver accents on an off-white background adds a touch of sophisticated modernity, without sacrificing its blackout capabilities.

Highlights:

• Chic Design: The silver-accented patterns create an atmosphere that is both soft and contemporary.
• High Blackout Performance: The triple-weave technology blocks 85% to 95% of light and UV rays.
• Effortless Installation: With 8 metal grommets per panel, hanging them on most curtain rods is a breeze.
• Good Insulation: It actively contributes to thermal insulation and noise reduction.

Who is it for? For those who want a curtain for their living room or bedroom that is a true decorative piece, without compromising on light-blocking effectiveness.

2. PONY DANCE Pencil Pleat Blackout Curtains, Biscotti Beige

Why it stands out: It doesn't offer complete darkness, but a moderate blackout effect (60-75%) perfect for creating a dim, intimate atmosphere. Its neutral beige colour and soft, heavy fabric (230 g/m²) make it a warm and versatile choice.

Highlights:

• Maximum Flexibility: Its pencil pleat header makes it compatible with rods, ceiling tracks, and even tension wire systems.
• Cosy Atmosphere: Ideal for a living room to reduce screen glare and maintain privacy during the day.
• Quality Fabric: The thick polyester ensures a beautiful drape and improves thermal and sound insulation.
• Uniform Colour: The colour is the same on both sides for a polished look, whether viewed from inside or out.

Who is it for? For those primarily seeking installation versatility and a solution to soften light and protect their privacy, without aiming for absolute darkness.

3. PONY DANCE Pencil Pleat Blackout Curtains, Grey

Why it stands out: It combines the best of both worlds: the versatility of a pencil pleat header and high-level blackout performance (blocking 85% to 95% of light). Its very dense fabric (230 g/m²) makes it an excellent thermal and acoustic curtain.

Highlights:

• Maximum Effectiveness: Highly effective against light, heat, and noise, this is the perfect curtain for a bedroom.
• Dense and Soft Fabric: Its high-quality polyester ensures an elegant drape and excellent durability.
• Versatile Installation: Adapts to all types of rods and tracks thanks to its pleating tape.
• Understated Aesthetic: Its neutral grey colour integrates easily into most decors.

Who is it for? For anyone whose top priority is near-total darkness and high-performance insulation. This is especially relevant for children's rooms, night-shift workers, or rooms overexposed to sun and noise.

Other Sizes, Other Colours?

Our guide focuses on the standard 140x245cm size, but because every home is unique, so are your needs. Feel free to explore our full range to find other sizes, colours, or hanging systems.

️ Discover our complete collection of blackout curtains and blinds

Frequently Asked Questions (FAQ)

What's the difference between a blackout curtain and a light-filtering curtain?

A light-filtering curtain simply filters light to soften the ambiance and provide privacy from prying eyes, without plunging the room into darkness. A blackout curtain, on the other hand, is designed to block a maximum amount of light (up to 100%) using a thick fabric or a special lining to create total darkness, which is ideal for sleeping.

Does a blackout curtain really protect against the cold?

Yes, a high-quality thermal insulating curtain creates a significant thermal barrier. In winter, it traps an insulating layer of air against the window pane, which reduces the cold draft effect and limits heat loss. Of course, its effectiveness is directly related to the thickness and density of the fabric.

How do I wash my blackout curtains?

Most polyester models are machine washable. The first step is to always check the manufacturer's label. As a general rule, opt for a delicate cycle at a low temperature (30°C maximum). Never use bleach and prefer to air-dry. A quick touch-up with an iron on a low setting will remove any remaining wrinkles.