Do you live on the ground floor? Does your house have a small tavern? Well, on the one hand you are lucky because you have rooms and an outdoor environment that, if properly used, are a great resource for the whole family.
It is certain that, when serious problems of rising damp are observed in the walls, it is necessary to eliminate saltpetre from the floor and walls, to fight with mold, peeling plaster and bad smells it is hard to perceive these environments in a positive way, but they become only a weight and a fee!
- In these cases, isolating the existing floor is the very first thing to do. The current legislation also provides that, today, the basement rooms, if equipped with suitable height and adequate aeroilluminanti ratios can be recovered for housing purposes, exactly like the attics, but one of the indispensable requisites is the presence of a ventilated crawl space .
At one time it was customary to build houses directly on the ground, interposing only a layer of gravel and a layer of lean concrete between the floor and the ground. For the Under floor Insulation this is important now.
However, rising damp from the ground causes quite a few problems, which is why it has been a long time since this practice has been overcome and the buildings are always equipped with ventilated crawl spaces.
How the ventilated crawl space is born
Initially, to create a ventilated crawl space, the classic “masonry and floor slab” was used. In practice, using normal solid bricks, small walls of about half a meter high were built above the lean concrete, equidistant from each other and the first floor was thrown above this “rise”, so as to remain well separated from the ground.
The Right Technology
Then clearly the technology has made great progress and the so-called igloos or crabs are born, which are nothing more than hollow prefabricated elements made of plastic or thermoplastic resins, which replace the old masonry and boards making the creation of the crawl space much faster.
Today there are really a lot of models, of variable heights from 10 to 70 and of different shapes. In all cases it is possible to walk on it and also acting as disposable formwork for the overlying jet, their installation is really simple.
How to do it operationally to isolate the floor from moisture
Making a ventilated crawl space and insulating the ground floor or basement floor would therefore seem simple and in fact for new buildings it is, but the same cannot be said for existing buildings.
In renovations the simplest, but also rarest, case is that in which the basement or ground floor rooms have a height much higher than the classic 2.70 m habitable (at least 70 cm more), because in these cases it is possible think about making the new floor and its crawl space above the existing one , without performing costly demolitions.
The important thing is that there are about fifty cm for air circulation and that there are small ventilation openings on the façade that allow natural ventilation and an air flow.