If your problem's not fixed by one of the following, drop us a note via our contact page.

Gecko panes are designed to fit quite tightly, to ensure an airtight fit. They may even bow slightly along each side. However, if the frame comes away from the glass pane by more than 5mm in the middle on any side, or the sponge surround bulges out at the corners, or you just can't get the pane in, you can adjust the sponge surround. These methods can remedy sizing errors of up to 12mm. 

1. Check which dimensions are a problem: If there is significant bowing on the sides, but not the top and bottom, it may just be the sides that need adjustment, for example. 

2. Release the pressure! The sponge surround is hollow, but airtight. Allowing the air to escape can provide a bit more play. Using nail scissors, make a small snip in the front of the sponge at the mid point of each frame side. These will be invisible, but allow air to escape. If that doesn't work:  

3. Check the corners of your window frame for obstructions such as a build up of paint. Try to remove this with a kitchen knife, flat head screwdriver or similar. If that's difficult or impossible (the build up might be glazing putty), then, while pinching each corner of the sponge surround, snip 1-2mm from the tip of the sponge corner. If that doesn't work:

4. Trim the sponge surround. Snip off the top of the sponge surround all the way along on both problematic sides. Ragged snipped edges will be hidden when installed. Try to fit the Gecko Pane again. If that doesn't work:

5. Remove the sponge surround completely. Snip the corners of the surround, so that each side can be removed separately, then pull it off completely. Do for one side, try to refit, then, if it's still too big, remove the other side. 

Gecko Panes should fit snugly. If they don't, they may fall out and on windows prone to misting condensation may build up behind them.  

If the Gecko Pane is only slightly too small (i.e. there are no gaps visible between the Gecko Pane's sponge surround and the window frame that allow the glass pane to be seen), just use the provided adhesive strip to affix the Gecko Pane to the window. 

Cut two lengths of adhesive strip, about one third the length of the Gecko Pane's top and bottom sides. Affix these to the mid points of the Gecko Pane's top and bottom vertices where the frame will face the glass window pane. 

Use an alcohol wipe or similar to ensure that the glass is very clean where the adhesive strip will stick.

If it's a cold day (enough for the glass pane to have condensation on it), warm up the area where the strip will stick using a hairdryer. If you don't and there -is- condensation on the glass, the adhesive will struggle to stick. Also run the hairdryer over the adhesive strip to warm it, which will aid adhesion.

Remove the blue plastic liner from the strip, then install the Gecko Pane, using modest pressure - the strip is very strong and the pane very light, so not much pressure is needed - you don't want to push the glass pane out of the window!  

If the Gecko Pane is significantly too small, such that there is going to be a slight gap between the Gecko pane and the window pane, position the Gecko Pane such that the gap is least noticeable. For low windows and horizontal gaps, this will tend to be along the bottom. For high windows it will tend to be along the bottom. You can use more sponge surround, available on our website, to pack these gaps. 

Gecko panes can be affixed to your glass window pane using very high bond adhesive tape if i. There's no frame to hold them in place, ii. They're too small to be held in place firmly, or iii. You simply want more confidence that they will stay in place. If you need more tape, let us know. 

Glass is a great 'substrate' to which to adhere, but if it's covered in condensation, or dust, or too cold, the adhesive won't stick. Follow these steps to ensure good adhesion:

1. Clean the glass. Make sure the window is cleaned where the adhesive tape will stick using alcohol wipes or just normal cleaning products. Leave for a few minutes to dry out, or use a hairdryer if in a hurry. 

2. Dry the glass. Dry the area where the tape will stick with a towel or paper towel. On a cold day, if your window panes suffer from condensation, then condensation may form again as soon as you stop wiping. To prevent this, warm the edge of the glass pane where the adhesive will stick with a hairdryer. The residual warmth will give you time to apply the Gecko Pane.  

3. Use more adhesive tape: Generally, just a couple of lengths of adhesive tape, a third of the length of the top and bottom of the frame, applied at the midpoints of the top and bottom of the frame, is sufficient to hold your Gecko Pane in place.

But if you're still not getting sufficient adhesion, or you want to be more confident that the pane won't fall out (perhaps due to installation in a roof light), you can apply adhesive tape all around the frame of the Gecko Pane. Again prepare the glass, heating if necessary, and install the Gecko pane with modest pressure. You don't want them -too- well stuck down, in case you need to remove them in future to remove condensation or for other reasons - the adhesive tape is very strong.

4. Replace the adhesive strip: "stuck down" Gecko Panes can actually be removed and reinstalled several times. The adhesive strip retains its stickiness well. However, if the existing adhesive strip has become dirty, it won't work as well. Removing the existing strip and replacing it is not difficult. More strip can be bought from our website. 

Mild to moderate misting:
  • Especially if installed on warmer, more humid days, it's easy to trap moist room air in the cavity formed with the window when fitting Gecko Panes. On cold days, this can cause slight internal misting, especially in the morning when it's colder. You can ignore it if you don't mind it - the Gecko Pane is still doing its job in terms of cutting heat loss and the misting will clear as the day warms, or when days in general get warmer. 
  • If the misting bothers you, or it's not disappearing as the day warms, and you’ve fitted your Gecko panes just using friction, simply remove the pane, wipe the window and replace the pane.
  • If possible, try to do so on colder, clear days when humidity is low. Ideally, close the door to the room and open a window for ten minutes until the room has fallen to the outside temperature, which will reduce room humidity. Then remove the pane, wipe away condensation and replace the pane. This will prevent you from trapping yet more moisture in the cavity.  
  • Even panes that are affixed down can be removed and re-inserted, as the adhesive strip retains its stickiness, but care is needed. Use a kitchen knife to prise away a corner gently before pulling the Gecko Pane out completely. When replacing, remember to apply pressure to the sticking points again. When Gecko panes are out of their windows, avoid getting the adhesive dirty.

Severe condensation (droplets):

  • Severe condensation behind the Gecko Pane is normally a sign that your window frame itself suffers from penetrating damp, because this is the only way that a large quantity of moisture can get behind the Gecko Pane. It tends to occur when Gecko Panes have been installed in winter when the window frame has already become damp, usually because the pane suffers from extreme condensation.
  • These window panes actually tend to benefit most from having Gecko Panes installed, as Gecko panes at least stop further dampness by reducing condensation. Again, the Gecko Pane is doing it's job in terms of reducing heat loss and condensation, and it can be ignored if you do not mind the visual impact, but you can also remove the Gecko Pane reguarly and wipe away droplets. Eventually, this should help the window frame dry out and condensation will abate.
  • Sometimes frames can allow modest continued ingress of moisture from outside because timber and window putty can be slightly porous. So long as the frame (especially the outside) appears in good condition, this is likely to be natural and not a concern but may necessitate occasional clearance of misting behind Gecko Panes. A new coat of paint on the outside of the window may eliminate this. If the frame of the window in which you plan to install Gecko Panes shows evidence of rot (it will feel spongy to the touch), consider first engaging a specialist to undertake remedial works. While Gecko Panes will help dry the window out, further measures are probably advisable. 

Gecko panes fit behind most window furniture, but occasionally there's insufficient space. Finger pulls or handles can often be bent outwards slightly to make space, but be careful not to damage your window.

Sash closers are the most common obstruction. If there is less than 11mm behind one and the closer is in good condition, repositioning it is a reasonably straightforward DIY task.

If the closer is painted over or rusty, it can be much more difficult. A skilled professional may be required to move them. For security reasons, it may be better and simpler to have them replaced.