Interstitial condensation forms on the interior side of a building structure such as walls, flooring or roof space. The greatest concern to homeowners and builders is the formation of excessive levels of interstitial condensation, which can cause irreversible damage to the structure of a building. As mentioned above, problems occur when there is not enough ventilation for condensation to evaporate. Usually humidity levels in a home remain at around 50-70% relative humidity. When this occurs, the air is said to have a relative humidity level of 100%. Once vapour levels in the air reach ‘saturation point’, moisture in the air turns into water droplets and condensation forms. Water vapour is naturally produced in everyday activities such as cooking, washing, and using heating appliances.
KINGSPAN DEW POINT CALCULATOR INSTALL
On the other hand, don’t be afraid to install bulk wall insulation if you have good ventilation in your home, the benefits of installing wall insulation are huge and worthwhile! You can significantly reduce summer heat gains and winter heat losses by up to 25% with wall insulation and wall wraps that make your home airtight. Before installing any type of insulation, especially wall insulation, we recommend inspecting the cavity spacing to ensure there is adequate ventilation. This is when you have a problem that should be quickly addressed and resolved. You may even notice a damp ‘muggy’ smell in your home, and small black spots appearing in areas such as the bathroom, basement or attic. However, in a building that is airtight and not properly ventilated, condensation build up can occur in vulnerable areas such as carpet, wallpaper, timber floors etc. It depends, in a well ventilated building condensation should quickly evaporate. So, essentially airtight homes are more energy efficient but adequate mechanical ventilation is required to control moisture. By installing an airtight membrane such as a wall wrap, this can increase the performance of wall insulation by up to 20%. Additionally, choosing the right wall wrap can reduce the risk of condensation and mould growth.
The use of exterior wall insulation can warm sensitive surfaces and work to reduce the risk of condensation build-up. Firstly, condensation forms when humid air meets a cold surface and that contact creates water droplets.
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