Well, firstly, it is important to understand what the term “sub-floor” is actually referring to. Sub-floor condensation is one of those things you may see referred to in surveyors reports but are not really aware of what it means. Thus, when warm air comes in contact with a cold surface, the air quickly cools and the excess moisture releases in the form of condensation. In cold weather, if you notice the moisture or condensation does not go away, then you should probably take your car to a mechanic. under the influence of high and low temperatures, condensation takes place and on your floor moisture and puddles of water. If you have cold walls, eg a garage, and the floor is not permeable, because there are tiles or cement coating on it, etc. The obvious places for condensation to occur are on cold walls, wiondows, and floors, but it can also occur in roof spaces and in sub-floor areas where there is a timber suspended floor; in the latter case, it can lead to dry rot or wet rot developing in floor timbers. It is an issue that generally remains unseen until a problem with the floor arises. If this material is warm on one side and cold on the other, the moisture will be deposited in liquid form within the material. A much less common form of condensation occurs when the Dew Point is reached, not on the surface of a wall but within the structure of the building itself. The Cause. Often called "sweaty windows," the condition is the result of high humidity and low temperatures. Condensation can occur under suspended floors greatly increasing the chances of fungal decay in floor timbers. Warm air holds more moisture than cold air. It can block the view, drip on the floor… How to Treat Condensation However, condensation can also form on walls. This is a particular problem in heavily insulated or air-conditioned homes. Humidity, Condensation and Your Home. What Causes Condensation on Cement Floors? This happens when warm, moist air diffuses into a vapour-permeable material, such as fibrous insulation. Although moisture can come from processes that create heat or runoff from fluid used in equipment like forklifts and hand trucks, serious condensation is usually caused by the temperature difference between cold cement floors and warm air. If this is the case and the exhaust is the culprit, the condensation should clear up after you warm the muffler up. By reducing condensation, the risk of employee accidents due to slippery floors is dramatically reduced. Cold walls, condensation and clever solutions Tom Robinson 5th September 2018 5th September 2018 Blog It’s been a summer like no other and one we’re not likely to forget in a hurry, though as we now enter September and the nights begin to draw in, our attention turns once more to heating our homes. Unfortunately, in old homes this is a common place for heat to escape, so it’s worth thinking about how insulation can make them more thermally efficient, hold heat for longer and protect your home from damp. You'll see this commonly on windows, which are generally the coolest surface in an insulated home. That is because the exhaust tends to produce more condensation on cold days. In the quest to make our homes warmer and more efficient, floor insulation is often overlooked. 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