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A Complete DIY guide to Double Glaze your caravan


  • You need
  • 1 x helper
  • 1 x tape measure
  • 1 x flat screwdriver
  • From the inside your caravan holiday home take a width & height measurement of the window from wood to wood.
  • You will have to remove the plastic corner mouldings on the caravan windows or/either remove the plastic trim around the window to view the wood.
  • Make the measurements accurately and a tight fit,
  • Always mark down the location (bedroom, bathroom, etc) and the number example: Livingroom 1 table side.
  • Decide what opening style required for each window. Check styles and colour
  • Standard are fixed or full openings.
  • If you require full opening windows larger than 800mm square then you need to choose a (horizontal) split window with the opening left or right as viewed from the outside.
  • We also manufacture top opening caravan windows which once again the maximum is 800mm square,

Once you are confident you have the correct measurements and chosen the style for your caravan please send an email for a quotation.

In your request we will require the following

  1. Caravan window sizes
  2. Style & colour of caravan windows
  3. Location of windows in caravan
  4. Make and model of caravan

Click to email details

Once your windows have been made and delivered you are ready to move on to the second stage.

  • You will need
  • 1 x Helper
  • 1 x Cordless Screwdriver (or normal)
  • 1 x Flat bladed screwdriver
  • 1 x Coping saw
  • 1 x Tin snips
  • 1 Plastic scraper
  • 1 x Knife
  • Remove all curtains, pelmets etc. that may obstruct the removal and installation of your caravan windows
  • Locate where the existing fixing screws are, either external or internal behind a plastic trunking.
  • Some old style push out caravan windows will have top screws only under the canopy and internal window stay screws.
  • If internal, remove trunking by means of a screwdriver & remove the fixing screws
  • Once all the screws are removed from your caravan window remove the external rain deflector canopy from above the windows. These will need to be refitted afterwards.
  • All that will be holding the window in at this point should be the mastic seal.
  • Gentle prising with a flat screwdriver usually breaks the seal but if not use a bit more pressure it may be needed or even cutting little bit at a time with a knife as your helper applies pressure but take great care not to damage the panel.
  • Some caravans have rounded corners on the windows once the window has been removed you will see that there is a rounded block of wood in the corners.
  • Simply remove and cut the aluminium square using the tin snips and coping saw and leaving a square or rectangular window aperture.
  •  Next clean any excess mastic from around the outside of the window, If stubborn use a PLASTIC scraper as well.

Next to install your new double glazed windows

  • You will need the following
  • 1 x Helper
  • 1 x Screwdriver
  • 1 x Nylon faced hammer
  • From outside lift the window into the aperture, The window is designed oddleg style so as to have a 19 mm lip all around the outside.
  • This lip is fitted with a 6mm waterproof tape seal.
  • Once the window is fully in, The helper on the inside needs t fit the internal trim to the serrated part of the profile.
  • The helper needs to hammer in the trim with the nylon faced hammer which pulls the window in tight.
  • Repeat this on all four sides
  • Once in if it is an opening window, Open the sash and screw 1 fixing screw either side through the friction  stay hinge.
  • Then tap in the 4 moulded corners to leave an internal decorative finish.
  • Clean the UPVC with solvent cleaner and the glass with glass cleaner.
  • The large front window (normally fixed) may need to be unglazed, to allow you to screw it in for added safety.
  • If so then the external beads should be removed by means of a paint scraper.
  • Once out the glass can be removed with class suckers.
  • The frame can be fitted as above
  • Extra screws can be put through the UPVC frame into the caravan timbers vertically and horizontally.
  • The glass can then be replaced on glass packers and the beads pushed and clicked into place.

Please note this guide Is for the windows supplied by DIY Mobile Windows

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