Lasting products, guaranteed

All our products are custom built to your own specific measurements in our state-of-the-art factory using only the highest quality materials, ensuring your home improvements last for years after their installation. To put your mind at ease, everything we sell comes with a comprehensive insurance-backed guarantee.

If your new products break or aren’t performing as they should, then contact us to discuss the steps required to resolve the issue. We will repair or replace any faulty PVCu and aluminium windows and doors for free, providing the defect occurs less than 10 years after its manufacture. 

Please read full terms and conditions and if you have any questions or are unsure if you’re still under guarantee, get in contact with one of our advisors with a copy of your contract to hand.

To ensure your new windows and doors last for as long as they can, they’ll require some TLC from time to time. Don’t worry, only simple maintenance is required to keep them looking and feeling like new. Below we’ve explained step by step some easy ways to keep your Britannia products looking their best, including some useful hints and tips on care and upkeep so that your guarantee remains valid.

uPVC Care

Taking care of uPVC is really easy

To keep it clean, just wipe it down with warm soapy water. Abrasive products and solvents like glass cleaner, metal polish, and scouring pads may damage gloss finishes or woodgrain effect finishes, so they should be avoided.

If stubborn marks don’t budge, they can be removed with a specialist uPVC cleaner.

To prevent condensation from building up, clear any debris from drainage slots between the bottom of the window and the external sill, and from inside the sashes when the window is open.

Glass Care

Whilst the glass used by us will be of good quality it may feature minor imperfections & blemishes & will be assessed according to Glass & Glazing Federation guidelines.

Just use a non-smear glass cleaner product and a paper towel to keep your glass looking shiny and new.

Spray the cleaner directly onto the glass and into the corners, then wipe down vigorously with the paper towel until it’s nearly gone. Then turn over the paper and buff until dry. For the very best finish, do the same to the outside of the window – until you can see your reflection in it.

External Glass

  • Clean every four months
  • Keep it grit and grime free with warm soapy water
  • Finish with a glass cleaner
  • Only use a soft cloth or paper towel.

Internal Glass

  • Clean once a month
  • Finish with a glass cleaner
  • Only use a soft cloth or paper towel.


Any metal-to-metal joints that do not have nylon bearings should be lubricated once a year with light engineering oil such as 3-in-1. These joints include friction stays, hinges, espagnolette, gearing mechanisms, shootbolts and locking mechanisms.

Rollers on door bolts, espagnolettes or shootbolt mechanisms that engage with locking keeps should be lubricated once a year with light grease such as lanolin.

How to keep your hardware clean

  • Remember to clean your window furniture every four months.
  • Use a soft duster or a damp chamois leather to remove dust and dirt
  • Superior polishings and coatings eliminate the need for regular polishing and cleaning
  • Avoid abrasive products and solvents such as metal polish, scouring pads and acetone.

Cleaning tips

  • It’s a good idea to remove all rings, bracelets and watches before cleaning glass to prevent scratching.
  • For your safety, never walk on a bay roof or lean a ladder against the frames, glass or guttering. If access is required above a large bay window, tower fixed scaffolding is recommended.
  • And remember to use the right cleaning technique for the right part of the window, as outlined below, to keep them looking their best.


Just wipe with a damp cloth and dry thoroughly to remove dirt and dust.


Effective weather seals prevent draughts and stop heat escaping from your home. To keep them doing the job well, clean with a damp cloth. If a seal becomes dislodged from its grooves, simply slide them back into position to avoid damage.

Composite doors

Composite doors work hard to protect you and your home, but it’s not hard to look after them. Here’s how to care for each part of the door:

Door Leaf

Wipe away grime and grit with warm water and dry with a soft cloth.

Door frame

Wash with warm soapy water. Stubborn stains might require specialist uPVC cleaner.

External glass

Wash with warm soapy water and a soft cloth. Finish with a proprietary glass cleaner.

Leaded glass

Wash with warm soapy water and a soft cloth, and finish with a proprietary glass cleaner. Natural oxidation will occur over time.


Take a clean cloth and warm water with a mild detergent, then simply wipe clean to a shine. Add light engineering oil such as 3-in-1 to all moving parts, especially if you live near the coast or an industrial site.


Lubricate with light engineering oil.

Cylinder locks

Use a Teflon-based lubricant, not oil or graphite powder.

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