Book a survey today.

Interested in Gecko Panes? 

  1. Send photos of your windows (taken square on) to or via WhatsApp or text message to 07599183995 (or click here to use WhatsApp on the device you’re using) with your name, email and postcode.
  2. We’ll assess suitability and get right back to you.   

Alternatively, fill in our contact form and we’ll get right back to you.

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Simply fill out the form to schedule one of our surveyors to evaluate your sash windows.

Our experts will guide you every step of the way and recommend the best options to keep your home cosy.

Available 8am – 7pm, Monday to Sunday.
A typical survey takes up to 60 minutes (around 5 minutes per window).

Not sure if Gecko is right for you?

Our experts are here to guide you to the best options.

Give us a call or drop us an email with any questions.

Why Gecko?

Save on cost and energy

The planet has enough to worry about, so Gecko Panes are designed to trap a layer of air, turning it into a strong insulator, thereby reducing heat loss and emissions by up to 50%. All the benefits, minus the cost.

Seamless design

Bespoke, handmade and clearer than glass, Gecko Panes are secondary glazing that doesn’t obstruct existing windows.

Minimal visual impact that revitalises the look of old panes.


1.  Measure

2. Off-site production

3. Installation

Whether you fit them yourself or ask us to do it for you, Gecko Panes are easily measured and installed in minutes, with no damage to existing windows.

Frequently Asked Questions

A Gecko Pane simply traps a 12mm layer of air beside the single glazed pane. This acts as an insulating layer, cutting heat loss by up to 48%.

The thickness of a second sheet of glass makes almost no difference to the U-value, which is why Gecko Panes achieve nearly 50% heat loss reduction using just 2mm of thick clear plastic, making it more cost effective for everyone.

Gecko Panes also drastically reduce condensation because they raise the temperature of the pane such that the dew point is less often reached.

And to top it off, the combination of the Gecko Pane, captured air and your original window significantly reduce noise pollution.

Note: Gecko Panes do not improve leaky, ill-fitting frames. Draught proofing, if necessary, is best undertaken as an additional measure.

A single glazed pane typically has a U-value, which indicates its ability to transmit heat from a warm space to a cold space, of 5.8 w/m2˚C, and that a double glazed pane with a 12mm air filled cavity (a Gecko Pane) has a U-value of 2.9 w/m2˚C, which is half as much.

Research by the Building Research Establishment suggests that heat loss through a typical timber framed single glazed window should be reduced by nearly half (48%) because the U-value is reduced from 5.8 to 2.8.
Gecko Panes have increased effectiveness if they are attached to an already double glazed window, and though research is pending, U-value calculators suggest that the further heat loss reduction would be around 30%, from around 2.9 to around 2.1.

For a window to suit a Gecko Pane, its frame must meet the glass at 90 degrees and where they meet must be at least 12mm deep.

The window also needs to be rectangular. We can’t manufacture Gecko Panes for curved windows, windows with curved corners or windows with different angles (e.g. triangular windows).

To clean the Gecko Pane, ensure that you use a very soft cloth (micro fibre is best) to avoid scratching the acrylic.
A soap and water solution or general-purpose cleaning spray is best. Apply your cleaning solution sparingly to ensure that excess moisture can’t penetrate into the cavity where it may cause misting.

Avoid using glass cleaning products which contain ammonia, as these may damage the pane.

Gecko panes will also prevent the inside glass surface of your window pane from becoming dirty, so that’s one less thing to worry about!

Gecko Panes always reduce condensation in well-sealed, dry windows.

A little moist room air can be caught between a Gecko Pane and the window’s glass during installation, and this can cause misting on very cold days. This usually disappears as the day warms and doesn’t affect the thermal properties of Gecko Panes – they are still reducing heat loss as intended.

Popping out Gecko Panes to wipe away any moisture building up is really straightforward. If it has to be done regularly, this normally just indicates that windows need a new coat of paint.

Georgian windows (with many small panes separated by thin glazing bars) that suffer from dampness should be assessed before installing Gecko Panes.

The good news is that Gecko Panes work well with Georgian windows, and windows that rarely suffer from dampness or with an exterior framework that is in great condition are almost always fine.

However, if your Georgian windows do suffer from dampness, they may be poorly sealed. This can happen because greater care needs to be taken with the narrow timber glazing bars to ensure they remain well-sealed on the outside (exterior).

If not well-sealed, exterior moisture might get between the glass and Gecko Pane. This should be removed regularly. Doing so is easy straightforward but, if you have many multi-pane Georgian windows, it can be time-consuming.

For Georgian windows that suffer from dampness, check there are no cracks in the outside putty, that exterior paint is not flaking and that paint overlaps the glass panes by 1-2mm all round (this is key to effective sealing).

If in doubt, install a single Gecko Pane in dampest window. If no moisture occurs in cold seasons, install more Gecko Panes. If rapid moisture build-up does occur, either remove the build-up of moisture regularly or repaint the windows.

Repainting poorly sealed windows is highly advisable as it significantly prolongs their lifespan.

Although an innovative form of it, Gecko Panes meet the official definition of secondary glazing for RDSAP purposes. Domestic Energy Assessors should record them as such when calculating EPC uplifts.

Analysis by the Building Research Establishment suggests that installing Gecko Panes in single glazed properties could result in an EPC rating uplift of up to 3 points.

Gecko Panes can also be used to improve the performance of older double glazing, but the reduction in heat loss is less than in the case of single glazing.

We’re nice people, and we want customers to be able to try out Gecko Panes as affordably as possible, so we always suggest that new customers buy one pane in the first instance, so that they can appreciate the benefits without a large financial outlay.

Taking this one step further, if you install a Gecko Pane and you decide they’re not for you, just let us know. If the pane is less than 0.3 square metres (say 50cm x 60cm or similar), we’ll refund you the full cost of the pane (not including the shipping cost).

If the pane is larger than that, we’ll refund 50% of the cost of the pane (not including the shipping cost).

Please note that we don’t combine multiple discounts.