From the rail with the cream insert hang the three front windows. To take them out the window stays have to be removed.

Instead of taking the screws out of the window, a better option is to take...

...the screws out of the window surround.

The window can then be lifted up to remove.

This is the profile at the top of the window and shows how it hangs from the rail.

All three windows removed. Now to tackle the rail.

The rail is in three sections. In between the sections are plastic clips held with screws.

One of the end clips removed. Note it keeps the cream plastic insert in place.

 Plastic insert removed and saved for re-use.

Removing the stainless steel screws from the rail. They are quite long.

Next removed the rails. I tend to work on one end prising and cutting with a blade.

Rail removed, the condition of the mastic is good.

Now for the clean up. The rails are scraped with a flat bladed screwdriver, then finished off with a rag and white spirit. The caravan is treated in a similar way, but used a plastic scraper.

I took the opportunity to clean the window rubbers with Auto Glym vinyl and rubber care. Left side, before. Right side, after.

The rails with 19mm W4 mastic Pressed onto the back. I left an overhang of approximately 8mm at the ends.

To help to fit the screws through the mastic a cocktail stick dipped in white spirit is...

...pushed through the rail to create a small hole, this allows the screws to be fitted in the rail so that they protrude a little.

This is so the rail can be alligned with the screwholes in the caravan. Meths was used before fitting to degrease.

Once alligned, press onto the caravan and tighten the screws.

Leaving the mastic slightly longer, it will cover the screw hole for one of the plastic fixings between the rails.

Next rail in place, the mastic overlaps between the pieces.

This is then pushed down with a small screwdriver.

Once all the rails are on, the cream plastic insert can go back on, making sure the hole in the insert is in the middle between the rails.

The plastic pieces between the rails are then re-fitted.

At this stage, the bodywork around the windows was then polished, it is a lot easier without windows.

Windows re-fitted, just a reversal of removing.