Blinds for Heat & Glare

Four different things

People often use “heat” and “glare” interchangeably, but they are four separate questions:

• Glare control – reducing uncomfortable brightness and contrast, such as sun on a screen or reflections across a kitchen worktop.
• Solar shading – reducing the amount of the sun’s energy that reaches the room.
• Room temperature – how warm the room actually gets, which also depends on ventilation, orientation, glazing and the size of the room.
• Insulation and comfort – how the window feels in cold weather, which is covered on our thermal comfort page.

A blind that is excellent for glare may do little for room temperature, and the reverse.

What usually matters

• Orientation – south- and west-facing glazing usually behaves very differently from north-facing windows.
• Type of glazing – roof glass, roof lanterns and large doors let in far more sun than a small window.
• When the problem happens – a short spell of afternoon glare needs a different answer from a room that overheats all summer.
• Whether you want to keep the view – and how much daylight you are willing to lose.

Often a good fit for glare

• Solar screen blinds – fabrics chosen to soften brightness while keeping a view out, depending on the fabric.
• Venetian blinds – slats that can be tilted to bounce direct sun away through the day.
• Vertical blinds – angled louvres for wide windows and doors facing low sun.
• Day & Night blinds – filtered light without fully lowering a solid blind.

Often a good fit for sunny rooms and roof glazing

• Pleated and cellular blinds – compact, lightweight and suited to many conservatory and angled windows.
• Roof window blinds and roof lantern blinds – overhead glass is often the biggest source of heat and glare in a room.
• Conservatory blinds – a combination of roof and side blinds for the whole space.
• Motorised blinds – scheduled to close before the sun reaches the room, especially on glazing that is hard to reach.

Performance varies by fabric and system, so we only quote technical figures where they are documented for the specific product you choose.

Usually compare another solution

• Blackout blinds used for heat – they cut light completely, which is rarely what you want in the day, and they are not designed as solar shading.
• Sheer decorative fabrics – pleasant diffused light, but limited help with a genuinely hot room.

When internal blinds are not enough

Internal blinds can reduce glare and make a sunny room more comfortable, but they sit behind the glass, so some of the sun’s energy has already entered the room by the time it reaches the blind. If solar heat gain is the main problem, for example in a south- or west-facing extension with large glazing, external solar shading can be more effective, because it intercepts more of that energy before it passes through the glass.

We cannot promise a particular temperature reduction from any product without system-specific evidence, and results depend on the room, glazing and ventilation. What we can do is explain the realistic options at your window and where each one is likely to help most.

Layered approaches

• External shading for summer heat with an internal blind for privacy and evening use.
• Roof blinds overhead with Venetian or vertical blinds on the side glazing.
• A solar screen blind for daytime glare with curtains for evening warmth.

A free home survey lets us look at the orientation, glazing and how the room is used before recommending anything.