1. Caring for Window Glazing
To keep the glazing in your windows looking and performing at its best, it's important to have a regular cleaning schedule. We recommend that you clean your windows thoroughly at least twice a year in normal conditions. However, if your property is near the coast where windows are more likely to get covered in salt water, or near to production or construction sites where there is more airborne dust and dirt, then there may be a need for more regular cleaning.
General Cleaning Advice
- Use a soft cloth and water with soap or washing-up liquid
- Use a commercial window cleaning solution or cream
- Follow cleaning product instructions
- Keep solution or cream away from the frame
- Wash away any residue with clean water
- DO NOT use creams containing abrasive pastes
- DO NOT use steel wool or razor blades on stubborn marks
When decorating your home it's possible for the paint to get onto the glass in your windows. If this happens, there are a few ways you may be able to remove it, but it's important to tackle this before the paint has time to dry.
- Use warm, soapy water for water based emulsions commonly used on walls and ceilings.
- Use white spirit to remove spirit based paints, used for wood or metal surfaces.
Dealing with Condensation
As weather conditions change around Autumn with temperatures dropping and wetter weather, window condensation becomes a concern with many homeowners assuming it’s their windows at fault. Condensation more often than not is a transitory effect that clears away in a couple of hours but it can be uncomfortable, looks unpleasant and can indicate issues that may cause ill health.
Condensation is caused by an imbalance of temperatures where one surface is at a different temperature to another for example when you take a bottle of milk from a fridge the glass surface falls below what is known as the "Dew Point". At this point, water vapour from the atmosphere condenses into water droplets on its surface. Bathroom mirrors are often exposed to condensation because of the warm, moist air created when running baths or showers and your kitchen windows may experience temporary condensation when cooking.
On windows, condensation can occur on the outside of the glazing, on the inside or between the panes of glass. If it's on the outside this is good and a demonstration of quality glazing. If it's inside the house this is caused by a lack of ventilation and lower quality glazing. For health reasons (caused by dampness and potential mould growth) we would recommend you change your glazing but there are lots you can do to reduce the issue first. The last is unfortunately a demonstration that your glazing unit has failed and is letting in water and should probably be replaced before you get water marks and reduced visibility.
As a rule, the warmer the window, the less likely it is to suffer from condensation. This means windows that are made-to-measure, and units that boast double or triple glazing, suffer far less from condensation as they retain more heat. However, in the case of Pilkington-K low emissivity glass, which provides particularly great insulation and allows less heat through it, the pane feels cooler from the outside. Therefore, if cold overnight temperatures are followed by a sudden temperature rise or moisture in the air, condensation may appear externally until the window temperature exceeds the dew point when it will completely disappear.