Window Condensation – Where the Water Vapour come from?

Acknowledging and managing the sources of water vapour inside a house can assist to decrease the probability of condensation forming on windows and doors.

Water Vapour and Condensation

Condensation occurs when a gas or vapour modifications to a liquid. In the house, this occurs when water vapour condenses onto surfaces such as windows, doors and mirrors.

When air filled with water vapour meets a surface area– such as a window pane– which is cooler than itself, it will shed surplus water vapour on that surface area, initially as a great mist or, if in fantastic enough amounts, as beads of water.

One method to lower the amount of condensation that occurs in the house is to offer adequate ventilation for wet air. Another is to make efforts– where practicable– to reduce the formation of water vapour in the first place.

Sources of water vapour inside a home


  • Two sleeping adults produce around one litre of wetness in 8 hours.


  • Steam clouds from heating water in saucepans and kettles. The gas in a cooker contains some water and average gas cooker can produce approximately one litre of moisture per hour.

Washing up

  • Through vapour clouds, released by the warm water.

Bathing, laundry, and damp outer clothing

  • These prevail major sources of water vapour in the house.

Heating systems

  • A flueless gas heating system can produce up to 350cc of wetness per hour.

Indoor plants

  • The life processes of plants are a substantial source of water vapour.

New homes

  • The bricks, lumber, concrete and other materials in an average 3 bedroomed house soak up about 7,000 litres of water during building and construction. Much of this is dissipated inside later throughout the drying out duration.

Sources of water vapour outside a house

Water vapour is always present in the outside air and levels depend on atmospheric conditions (temperature level and humidity).

A case in point is the formation of condensation on the whole surface area of a car, including the glazing, when left in an exposed location. This condensation would generally be gotten rid of using both the wipers blades and a squeegee.

As double and triple glazing becomes more efficient, heat is less able to pass through the window and warm the outer pane. This suggests that the external pane surface area remains cold producing the conditions that may permit condensation to form.

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Which Glass is Best for Double Glazing?

You might be amazed to hear that there are a variety of options at hand when choosing a particular kind of glass for your new double glazed windows.

That’s right, from tempered or self-cleaning, to covered or laminated, there is much to think about, and you’ll want all of the necessary details in order to make an informed decision.

That’s where we can be found in. Our blog page has been home to some hugely educational subjects of late, such as single glazing vs double glazing described.

This time, it is the fight of the glasses. Allow us to discuss the benefits of each kind of glass, and why a particular one might finest suit you.

Annealed Glass

As the least pricey option, hardened (or float) glass is a popular option. It’s been in usage for generations, so who are we to knock its quality? Not as tough as tempered glass, a double glazed annealed pane stays incredibly challenging to break. When it does, it shatters into large and harmful fragments. This can obviously prove to be very unsafe.

Tempered Glass

Tempered (or strengthened) glass is far stronger than annealed glass, given that it is processed through a thermal treatment. It is designed to safely crumble, as opposed to shattering, making it a much safer option. At around 3 to 4 times tougher than float glass, it is simple to see why tempered has actually become so popular in recent times. It is more pricey, but you are spending for quality.

Laminated Glass

Laminated glass is the choice for safety and security. 2 or more layers of glass are merged together with cast resin or polyvinyl butyal laminate. If the glass here ever breaks, it remains stuck to the laminate. Laminated glass is preferred in shops, as its durability can help to prevent theft. They do not call it ‘safety glass’ for nothing.

Self-cleaning Glass

Created in 2001, self-cleaning glass comes in handy since, well it cleans itself. A layer of titanium dioxide on the outside of the pane helps to break down any collected dirt. When the sun shines on the surface, it reacts with moisture to form hydroxyl radicals. From there, water beads fall on the glass and spread, washing off the dirt. Fantastic, isn’t it?

Noise Control Glass

Which glass is finest for double glazing if you live near an airport, freeway, a hectic roadway or perhaps have a recording studio in your house? The answer is pretty self-explanatory. You’re going to want to invest in some noise control glass. Standard double glazing reduces the quantity of sound you hear by as much as 75%, however even that might not suffice in a particularly noisy environment. The glass has acoustic inner-layers of polyvinyl butyal, that takes in sound. This means that really little outdoors sound makes its method into your home. Depending on the intensity of the noise surrounding your home, various thickness of noise control glass can be used.

Layered Glass

Understood as low E glass, covered glass is perfect for permitting natural light into your residential or commercial property. This is especially useful if you live in an open location with capacity for plenty of sunshine to reach your spaces. The beauty of covered glass is that it manages the natural light. It consists of a metal or tinted finishing that filters the sunshine before allowing it in. Lighting without the blinding glare? It’s the perfect mix. Not only does layered glass minimize the risk of skin cancer, it also secures your furniture and carpets from long-term damage.

Fire Protection Glass

Developed to offer a much higher protection from fire than other kinds of glass, fire defense glass is able to endure high temperatures and close proximity to flames from in between half an hour and two hours. This included time offers you a possibility to leave possible fires, in addition to allowing the fire service more time to reach you. Basic glass breaks at around 260 ° C, while fire defense glass is able to endure temperature levels of as much as 871 ° C. That is rather a difference, and one that might save lives.

Decor Glass

Can be found in various colours, textures and styles, decor glass is the kind of glass you see in homes where metal patterns are connected to the outside of the window pain, or even in between 2 panes. Naturally, such styles look great, and can be altered to match individual taste. As you would anticipate, decoration glass comes at an expense. Please take into account that decor glass isn’t ideal for locations where you would require visibility.

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Energy Efficient Glazing: A Useful Guide

In any home heat will be lost through doors and windows, nevertheless this heat loss can be decreased when a house has energy efficient double or triple glazing.

Energy efficient glazing helps keep heat inside the home and, in mix with other house energy effectiveness steps (such as cavity wall insulation, loft insulation and an energy-efficient heating unit), can cause a reduction in annual heating costs.

If you’re considering purchasing energy efficient glazing, you’re definitely not alone. There’s a lot to gain from this home improvement, however obviously there is likewise a lot to consider.

We advise using the GGF Energy Savings Calculator to see what prospective cost savings you could make when having energy efficient windows installed.

This short guide will take you through some essential info that will assist you make an informed choice.

What is energy effective glazing?

Energy effective glazing is the term used to explain glazing consisting of two or more glass panes within a sealed unit. This consists of double and triple glazed windows and comparable units discovered within doors.

Energy efficient doors and windows include a framing product (timber, aluminium, uPVC or composite) into which one or more glass sealed systems are fitted according to the design of the window or door.

Energy efficient glazing is ranked according to its ability to lower the quantity of heat that can travel through the window, the capability for sunlight to travel through the glass system, and the capacity for air to move through the unit.

Commonly, the highest ranked glazing according to performance is made with Low-Emissivity Glass which has an unique coating on the inner surface area of one pane, allowing light to travel through whilst reflecting heat back into the room.

What is in between the glass panes of a sealed system?

The air space limits the quantity of cold air able to get into your house. It does this by serving as an insulator and is totally sealed.

The space between the glass panes is filled with air or gas such as argon, krypton or xenon. These help reduce heat loss through the unit. When gas such as argon– which has low conductivity– is utilized within this space, the window is then even more efficient at keeping heat inside the home and likewise at hindering sound waves from within or outside your house, lowering sound pollution.

Sealed systems likewise have a strip in between the panes, made from metal or polymer. This strip is called a spacer which can contain a drying agent that handles any moisture that is trapped in the area between the sheets of glass.

The type of frame material used

As with the glass itself, the frame material utilized in energy effective windows and doors is also crucial.

There are numerous alternatives here:

  • uPVC has many benefits consisting of efficiency longevity (generally twenty years or more) and being recyclable.
  • Wood frames are eco-friendly and are often defined for residential or commercial properties where using initial products is needed, such as those within a conservation area.
  • Aluminium frames are an eco-friendly, modern-day choice due to the fact that the production of the product is low effect, recyclable and the slim appearance of the frames is preferable.
  • Composite frames are made up of a combination of wood and aluminium or plastic.

Energy score and u-values

For ease of purchase, particular window makers identify the energy efficiency of their windows with an energy score ranging from A++ to C, A++ being the most efficient. This score system has actually been developed by the British Fenestration Rating Council (BFRC) and it takes into consideration the entire window.

When this energy ranking is offered, a whole window u-value is likewise calculated. The u-value refers to how quickly heat can go through the system. The u-value scale works in the opposite way to an energy rating, because the higher the u-value, the more easily heat can travel through the window and the window is less effective.

The advantages of energy effective glazing

There are many advantages of EEG, which are increasing all the time as innovation and structure strategies advance, and our eco-awareness increases.

Key benefits consist of:

  • Enhanced energy effectiveness: Energy effective glazing might form part of a wider variety of energy saving procedures. If your house likewise includes cavity wall insulation, loft insulation and an energy efficient heating unit, these can all interact to minimise the amount of energy required to warm your home. As a consequence you can delight in lower energy expenses and a reduced carbon footprint.
  • Lowered noise pollution: Sealed double and triple glazing can be reliable at minimising medium to high frequency noise, developing a more comfy, private and tranquil house environment.

Improved thermal insulation: Energy effective glazing can help to keep your home warmer in winter season and cooler in summer season. The air or gas space in between the panes of glass in a sealed unit offers an additional layer of insulation. This increased thermal resistance minimizes the amount of heat that can escape the house during the cooler months. In summer season the reverse takes place, and the windows help keep the heat outside, keeping the house cooler.

Minimised condensation: Energy effective windows and doors help reduce the risk of condensation which occurs when a cold surface area and wet air satisfy. The resulting moisture can potentially damage the window frame and if it is especially bad, may even impact other areas of the space.

Safety and security: As there are two or more panes instead of one, energy effective glazed windows use a more safe and secure barrier versus undesirable entry than a single glazed window. The level of security can be boosted even more when laminated glass is used.

Expense savings: Assuming all other procedures have been taken, Installing energy effective windows can save you money over the long term by minimising the quantity of energy required to warm your home.The savings you get from energy effective glazing will depend on a number of elements, including the size of the home, the type of windows you purchase and your energy supplier. For a sign of the possible cost savings you might delight in based upon your house and windows, use the Energy Savings Calculator produced by the Glass and Glazing Federation.

A more comfortable living environment: Lower heat loss, plus reduced sound, assists toward a feeling of a lot more comfy house.

Increased home value: Making energy-saving improvements to your home has the possible to enhance its worth. Potential property buyers are significantly familiar with the eco-credentials of any home they consider buying. According to a report carried out by the Government based on property sales made between 1995 and 2011, a house owner making energy conserving improvements to their home might see a 14-38% increase in worth as a result.

A note on the value of ventilation

In more recent dwellings with higher effectiveness insulation, an absence of adequate ventilation can increase the danger of condensation forming on internal surfaces– including on windows and other glazed surfaces. A way of lowering this danger is to guarantee each space has adequate ventilation, such as drip ventilators or other kinds of ventilation.

Continuous improvements in frames, glass and gas combinations indicate the consumer’s energy effective window choice is increasing all the time. Energy effective glazing is a beneficial addition to any modern-day property wanting to take pleasure in a comfortable and potentially greater worth home.

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When to repair or change your windows

Repairing or changing windows– there’s a lot to consider, consisting of the advantages of upgrading to energy effective glazing. Here’s some recommendations to assist you choose.

Repair or Change your Windows

The choice about whether to fix or change windows can be challenging. Just like any home enhancement it is important to think of expenses and prospective savings in the short term along with over a longer duration.

This is especially relevant for glazing in the house due to the fact that updating to windows with a greater energy effectiveness rating has the potential to decrease your annual family energy usage.

So when considering window repair work or replacement it can be helpful to keep in mind the potential savings you could gain by installing windows with a higher level of energy effectiveness. You can determine these possible savings using the GGF Energy Savings Calculator– an easy-to-use online tool that lets you compare different energy ratings and try out various window replacement situations.

Window upkeep and determining issues

The value of properly preserving the windows in your house can not be overemphasized. That’s because in addition to potentially affecting the value of your property, the condition of your windows can have a considerable effect on both how comfortable your home is to live in and how much energy is needed to heat and cool your living areas.

To help recognize problems with your windows and the best strategy to take, we have actually provided some specialist assistance in 4 simple actions.

Step 1: Check both sides of the windows

Examine your windows for any proof of rot (wood windows) or other damage to the hinges or jambs (the vertical parts that form the side of a window frame). Inspect if any of the seals are harmed, and if there are any chips in or around the glass.

Windows can be damaged by the sun, water and other weather exposure, so look for indications of this. If your windows have any of these faults which are jeopardizing their performance or aesthetic appearances (or both), you might wish to think about getting them repaired before any more damage takes place.

Step 2: Test the performance of your windows

Can you open and close your windows? Sounds apparent but often windows stick due to paint, heat expansion or a damaged manage. Also, examine if there are any noticeable draughts. All of these are signs your windows might need fixing.

On uncommon celebrations you might see condensation between the panes of a glass sealed unit where the seal of the sealed system have stopped working. If so, the sealed unit will require to be changed and this can typically be done quite easily by your window repair business, although they will have to take specific measurements to purchase a sealed unit specific to size.

Step 3: Analyse the influence on your living environment

Window quality might well be affecting your heating costs. If you have single glazed windows, then it could make a tremendous distinction to the comfort of your home and your heating costs if you were to change them with energy efficient double or triple glazed windows. New energy effective glazing has the ability to show heat back into the room due to a low-emissivity (” Low E”) finishing which has the effect of lowering heat loss through the windows.

Instead of replacing your windows, a less expensive alternative to improve energy efficiency would be to think about installing secondary glazing inside your existing windows, to form “double glazing”, nevertheless your existing windows need to remain in outstanding condition.

Noise reduction

Are you affected by noise? If you live near loud roads or other kinds of sound disturbance, then you can enhance your living convenience by changing windows to double or triple glazing that can decrease the passage of noise. Glass sealed units with enhanced acoustic alternatives are available to decrease the noise even more.

Once again, if you want to decrease noise and keep your existing windows, setting up secondary glazing is a cheaper alternative. And for sound reduction, the larger the gap in between your existing windows and the secondary glazing the much better. The head and jambs of the windows within that gap can then be lined with acoustic material if desired to even more reduce the noise levels.


It is important to make sure that appropriate ventilation is maintained when replacing your windows. This will allow for good air circulation and lower the danger of condensation on the within the windows.

Step 4: Consider the age of your house

Older homes– It’s difficult to choose if you should replace windows when they are original functions of your home. If your home has stained or leaded glass, then replacing them could reduce the value of your home.

The excellent news is that these days window producers can reproduce your stained or leaded glass in energy effective replacement windows.

If you have a home which is centuries old and listed, then you will require to obtain permission from your local planning officer for any modifications. There are specialist glass suppliers who can locate such reproductions of centuries-old glass if pieces are harmed.

Similarly, if your home is in an area covered by an “Article 4 Direction”, then you will need to obtain permission from your regional preparation officer for any changes. Houses in Conservation locations have permitted advancement rights and do not need preparing authorisation to alter windows, so long as the replacement windows are of comparable aesthetics to your existing ones.

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How To Make A Drop Down Loft Hatch Door

Whatever you’re using your loft area for, whether it’s extra storage, upgrading your insulation, or even simply making any required repair work, simple access is a must. So with that in mind, we’ll show you how to make a fall loft hatch door that will make your life a lot simpler when it pertains to getting ‘up there’.

Generally, getting into home loft spaces was a cumbersome workout. Luckily, more recent homes primarily use updated fall loft hatches for ease of use, complete with insulated support for energy efficiency. If you’re looking to create a brand-new loft hatch, here’s what you require to know.

You don’t require to be a DIY professional when looking into how to make a fall loft hatch door, but some experience will assist. Always ensure you have the right tools for the task, wear security devices, and describe any maker’s handbook for guidelines and safe operation of any tools.


Prior to you can install your loft hatch door, you’ll need to find and prepare a suitable opening in your ceiling. Simplest and convenient access is generally found in the corridor, however make sure your planned hatch is at least 100mm from any wall or obstruction. Using a stud, pipeline, and wire detector will make sure you’re not cutting into anything you shouldn’t. It will likewise detect your ceiling joists which will identify the last position of your access hole.

Use a pencil to mark where the joist edges are and where your hatch will be, and using a drill and appropriate drill bit, produce enough holes that will allow you to insert a handsaw. Then cut along the lines you’ve made. As soon as the hole is developed, the next step is to produce the loft hatch frame surround.

Your Loft Hatch Frame

Comprised of additional pieces of planed wood, around 20mm thick, careful measuring is needed as these are cut to size and attached at right angles to the ceiling joists, and alongside the joists themselves. These will develop the frame for your hatch door without putting unnecessary stress on the ceiling joists themselves.

By screwing or nailing each piece of wood into position, you’ll have a suitable frame to attach you hatch door to. However, don’t over tighten your nail or screw your frame fittings right now. This will make it simpler to move any piece, in case it’s not positioned properly very first time. As soon as whatever’s in its right position, tighten them all up.

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Will Double Glazing Stop Condensation

When you have single glazed windows in your house, you will observe that some of your rooms feel much hotter throughout summertimes and cooler throughout winter seasons. In addition, frequent sound and disruption can end up being a typical issue with these windows

Owing to these factors, increasingly more individuals are now choosing double glazing their windows in addition to doors, but the main question to ponder on here is: will double glazing stop condensation and what are the advantages of double glazing?

What is Double Glazing?

The term glazing, derived from the Middle English word for glass, is a specialised window term. Keep in mind that even nowadays, individuals who fix or fix window glass are frequently called glaziers, and you’re more likely to hear the word glazing used in a more technical manner when many window makers call their window creates “single-glazed” or “double-glazed.”.

Double glazed windows, in this regard, are an excellent energy efficient option with the fringe benefit of reducing sound. These windows have 2 panes of glass. It deserves mentioning that the sealed air space present in between the 2 panes functions as an excellent added layer of insulation. Keep in mind that this additional thermal resistance tends to minimise the amount of heat that leaves in winter season and assists keep your home at a more comfortable and cosy temperature.

On the other hand, double glazing generally uses the opposite effect in summertime as it avoids undesirable heat from entering into your home. The extra insulation assists lessen your reliance on items like synthetic heating units as well as a/c unit and can lower your energy expenses.

Double glazed windows might have a low-E covering. Note that Low-E glass can decrease the amount of heat which leaves. Also, double glazed windows do not need to be tinted. Tinting can lower visible light while obstructing views. It is worth pointing out that double glazed windows can decrease ultraviolet rays by as much as 75 percent. Damaging UV rays might fade carpet, wood, fabric, paper, and even art work.

How Double Glazing Increases the Quality of Your Home.

High-quality frames along with edge spacers are standard energy effective window enhancements. Among the most popular options is a frame made from high quality UPVC.

Double glazing is also an ideal way to improve the resale worth of a home. This is due to the fact that with double glazing, older houses can be just as preferable and worthy to buyers who want to ensure that your home they purchase is efficiently insulated.

Security is likewise boosted as double glazed windows are often harder to break compared to windows with single glass panes. Keep in mind that the tight seal tends to make them more difficult to require or pry open from the exterior. You specify laminated or toughened glass for even greater security.

Double Glazing and Insulation.

A warmer glass surface area implies less chance of condensation. A lot of double and triple glazed windows are carefully designed to decrease the loss of heat from an interior space, like a room, by conduction, often from the inside to the beyond the building.

And in case a room is heated, under typical conditions, the room side temperature of an inner pane of a double glazed window would be much greater compared to single glazing. The likelihood of condensation, as a result, occurring when warm and damp air in your room comes in contact with this glass is lowered.

How Double Glazed Windows Can Stop Condensation.

When a window is just single glazed, the cold temperature level on the outside typically transfers very quickly to the within, triggering condensation to occur rapidly. On the other hand, when double glazing is set up, you will notice there is much better thermal insulation between the inside and outdoors. Condensation is considerably lowered, as a result, which creates a warmer, much healthier and drier home.

Double glazing is also called “insulating glass”. That is since it can provide a reliable insulating layer from the outside to within.

That is likewise how double glazed windows can help reduce unwanted condensation in addition to the associated wetness and water damage, mildew and mould, and the health effects.

It deserves pointing out that double-glazed windows are now typically basic both for new building along with replacement windows. These windows could be crafted so there’s merely dead air area in the little space in between the two window panes; that being stated, today it’s more common that these windows are diligently created so that the space in between the two window panes is filled using an inert gas, like argon or xenon, and this tends to increase the resistance to basic energy transfer through the glass panel.

Choosing the Right Window Frame.

The level of condensation at or near the edge of the double glazing as well as on your window frame would be affected partly by the product of your window frame. It deserves mentioning that timber window frames are terrific insulators. With high quality double glazing, and a home with good management of fresh air ventilation, it can be fairly expected that condensation on your windows could be removed.

On the other hand, where the window frames are made from aluminium (that isn’t thermally boosted) it’s likely that there would continue to be some level of condensation on your frames. The level would be influenced partly by management of inside humidity level and will be more noticeable in incredibly cold temperature levels.

Condensation could be a major issue, specifically in older homes; this is due to the fact that it causes mildew and mould, and in a lot of cases it would likewise rot timber frames while harming your household’s health. In this regard, double glazing works well to lower excess moisture on the window panes.

Final Thoughts.

As condensation only tends to form on surfaces that are cooler compared to the surrounding air, double glazing can greatly help reduce it by allowing the inner glass of your windows to keep heat. Yes, double glazing can certainly be a very efficient method to stop condensation.

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