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Spray Foam Insulation

How to Stop Condensation in Loft Space

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Many homeowners don’t use their attics for anything other than storage – if that. They’re often cold, dark, dingy and damp, but there’s no reason that your roof room needs be that way.

Instead, you can transform your attic into an usable room in your home, all year round.

But first: you need to know how to stop condensation in the loft space. We have the answers, and we’re here to share them. Let’s get started…

What Exactly Is Condensation?

Condensation refers to droplets of vapour in the air, that collect to form a surfeit of moisture. It generally happens when moist air comes into contact with a surface that’s colder than the external air temperature.

Condensation frequently appears on windows, as these are often a barrier between warm homes and cold weather outside. However, condensation can appear on surfaces that aren’t made from glass, and unfortunately, is well-known to affect attics and lofts.

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Why Does It Occur In The Loft?

Loft spaces tend to feel cold temperature-wise compared the rest of your house. Insulation is normally placed within the floorboards of attics, so everything below the insulation stays warmer.

The consequences of this is that everything above is cooler – and of course, hot air rises. As the warmer air from the rooms below rises and comes into contact with the roof rafters and colder surfaces, the residual moisture in the air transitions into a liquid state.

It’s easily spotted on wooden roof rafters, and can accumulate to such a substantial degree, that if left unchecked long-term, will compromise their structural integrity.

What Challenges Does It Cause?

Condensation is liquid, and so needs to properly dry out to in order to be entirely removed from the surface upon which it’s developed.

When a surface becomes wet, and remains that way for a substantial period of time, it penetrates the surface material, and rapidly becomes damp. In the case of wood, this is easily done. In a loft, the lack of air flow, and particularly warm air flow, can make it difficult for the space to dry out.

Unless the collective, the damp will begin to rot the material around it, until it finally breaks down, with the wood softening and resulting in rot. In the case of roof rafters, this can have serious structural consequences for the property-that are not easily, or effectively resolved.

Damp also releases spores into the air as the material breaks down, compromising the air quality of the area around it.

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Once a proper seal has been installed, energy usage will drop. The lack of constant heating and cooling as a result of spray foam insulation can reduce energy bills by up to 35%, and grade the property considerably higher on an Energy Performance Certificate

How Can It Be Prevented?

Whilst it is common sense that a home should be warmer than the outside world, condensation can be stopped in its tracks, by ensuring effective temperature regulation, throughout all rooms in a home, as well as by creating a barrier that prevents moisture from penetrating the property.

This keeps the air at a stable level, without anything but essential residual moisture in it, so no excess humidity to lead to condensation.

The most effective way to create an air tight seal for a property from the outdoors is to have spray foam insulation applied to the interior. This is an industrial foam that can be sprayed onto, or injected into, areas requiring a seal.

Once applied, it expands up to one hundred times its original size, and then dries. The nature of this is that it fills and seals off the area around it; even spaces that can’t be seen.

In a loft space, spray foam insulation is installed directly into the roof rafters and the ceiling, with no need for any insulation material to be put into the floor.

This keeps the loft space at the same comfortable temperature as the rest of your home, so there’s no sudden change of climate in which for condensation to develop.

A drier home is better for your health, as well as your comfort! The allergens and toxins that damp releases into the air of a property can aggravate, irritate and even cause health conditions, through airborne contamination.

With spray foam insulation installed, air quality will be improved, making for a healthier, internal environment. 

Once a proper seal has been installed, energy usage will drop. The lack of constant heating and cooling as a result of spray foam insulation can reduce energy bills by up to 35%, and grade the property considerably higher on an Energy Performance Certificate.

Spray foam insulation needs to be installed by an expert technician, with British Board of Agrement (BBA) certification. Here at Home Logic, we have full accreditation, and teams of specialist installers available throughout the UK.

For a free no-obligation quotation and home survey, simply call 0800 1700 636, or click the button below to get the ball rolling today!