It often happens that on the perimeter walls of a basement or a basement in direct contact with the ground surrounding the house, more or less serious and evident problems arise, caused by humidity.
If the side of the wall in contact with the ground was, at the time of construction or subsequently, correctly waterproofed, it is evident that the humidity present in the wall is exclusively due to rising damp; otherwise, if there is no external lateral waterproofing, it has not been made in a workmanlike manner or has been inadvertently damaged, the perimeter walls in addition to being in direct contact with the ground in the part of the foundations, are in contact with the ground also with the external side of the wall, consequently absorbing the water present in it.
The main cause of lateral thrust humidity or lateral infiltration of the walls, arises in fact, from damp sources which, being beyond the walls, somehow manage to overcome them, causing humidity to enter the domestic environment.
The problem exposed is obviously not constituted by the humidity outside, constituted by the rain, the proximity of the house to watercourses, broken sewers, continuous irrigation or simply by direct contact with the damp soil instead from the inability of the perimeter walls to rise like safe waterproof barriers between the outside and the inside of the basement.
Being faced with problems in underground rooms linked simultaneously to the humidity in contact with the ground, to the lateral infiltrations of water and/or humidity and to the rising damp, means dealing with the most complex cases to solve those relating to the humidity of buildings.
In this case, the rising humidity is added to the lateral pushing humidity.
Products and technologies to use
Among the possible remediation measures from the problems deriving from the humidity in a basement, linked simultaneously to the lateral infiltrations of water, to the humidity in contact with the ground, to the humidity of rising damp and to the biodeteriogenic proliferations (mold, moss and lichens), to be evaluated and diagnosed always and in any case on a case by case basis, the combination of the following technologies and product cycles to be applied is effective and decisive.
BLOCKING OF WATER INFILTRATIONS WITH HYDRO-EXPANSIVE POLYURETHANE RESINS
Syntech HAG Flex
Mono-component semi-flexible, expanding (increases its initial volume of about 10 times) polyurethane resin, free from solvents, perfect for sealing small and large water leaks in the concrete or in solid masonry in general by injection. Perfect for filling and sealing small cavities, joints and discontinuities subject to movement.
Syntech HAG Flex
Mono-component semi-flexible, expanding (increases its initial volume of about 10 times) polyurethane resin, free from solvents, perfect for sealing small and large water leaks in the concrete or in solid masonry in general by injection. Perfect for filling and sealing small cavities, joints and discontinuities subject to movement.
Syntech HAG Eco
Mono-component, enabled for contact with drinking water, semi-flexible, expanding (increases its initial volume of about 20 times) polyurethane resin, free from solvents, perfect for sealing small and large water leaks in the concrete or in solid masonry in general by injection. Perfect for filling large voids and loose stone foundations inside the walls.
Syntech HAG Eco
Mono-component, enabled for contact with drinking water, semi-flexible, expanding (increases its initial volume of about 20 times) polyurethane resin, free from solvents, perfect for sealing small and large water leaks in the concrete or in solid masonry in general by injection. Perfect for filling large voids and loose stone foundations inside the walls.
Syntech HAG Cleaner
Cleaning agent specific for the necessary equipment during operations of injections to stop the infiltration of water in the buildings. Oily rinsing detergent, low toxicity, high solvent capacity for non-hardened polyurethanes, to clean and lubricate the internal pumping hydraulic circuits of both manual and electric pumps. It replaces acetone, methylene chloride and other detergents commonly used.
Syntech HAG Cleaner
Cleaning agent specific for the necessary equipment during operations of injections to stop the infiltration of water in the buildings. Oily rinsing detergent, low toxicity, high solvent capacity for non-hardened polyurethanes, to clean and lubricate the internal pumping hydraulic circuits of both manual and electric pumps. It replaces acetone, methylene chloride and other detergents commonly used.
Syntech HAG Iniettore
This rubber and steel injectors are to be inserted in line with the damage, cracks, loose foundations, joints, cavities and so on, then waterproofed through the use of Syntech HAG Eco and Syntech HAG Flex hydro-expansive polyurethane resins, specifically for immediately stopping water infiltration. Equipped with a “flat head” with non-return valve, it is used in conjunction with the Syntech HAG Connettore. Available in two different sizes: Syntech HAG Iniettore 120 = 120x13 mm; Syntech HAG Iniettore 170 = 170x16 mm.
Syntech HAG Iniettore
This rubber and steel injectors are to be inserted in line with the damage, cracks, loose foundations, joints, cavities and so on, then waterproofed through the use of Syntech HAG Eco and Syntech HAG Flex hydro-expansive polyurethane resins, specifically for immediately stopping water infiltration. Equipped with a “flat head” with non-return valve, it is used in conjunction with the Syntech HAG Connettore. Available in two different sizes: Syntech HAG Iniettore 120 = 120x13 mm; Syntech HAG Iniettore 170 = 170x16 mm.
Syntech HAG Iniettore 170
17 cm in length and 16 mm in diameter, this rubber and steel injector is to be inserted in line with the damage, cracks, loose foundations, joints, cavities and so on, then waterproofed through the use of Syntech HAG Eco and Syntech HAG Flex hydro-expansive polyurethane resins, specifically for immediately stopping water infiltration. Equipped with a "flat head" with non-return valve, it is used in conjunction with the Syntech HAG Connettore.
Syntech HAG Iniettore 170
17 cm in length and 16 mm in diameter, this rubber and steel injector is to be inserted in line with the damage, cracks, loose foundations, joints, cavities and so on, then waterproofed through the use of Syntech HAG Eco and Syntech HAG Flex hydro-expansive polyurethane resins, specifically for immediately stopping water infiltration. Equipped with a "flat head" with non-return valve, it is used in conjunction with the Syntech HAG Connettore.
Syntech HAG Connettore
Connection element between the flat head injectors and the pumping tube of manual or electric pumps, used to block water infiltration by injections of water-reactive polyurethane resins.
Syntech HAG Connettore
Connection element between the flat head injectors and the pumping tube of manual or electric pumps, used to block water infiltration by injections of water-reactive polyurethane resins.
Syntech HAG Pompa AZ-PT/B
Manual single-piston pump, self priming, simple effect, to inject polyurethane and epoxy fluid resins. The maximum pressure that can be delivered by the pump is 40 bar. The flow rate is 1 litre in 55 cycles.
Syntech HAG Pompa AZ-PT/B
Manual single-piston pump, self priming, simple effect, to inject polyurethane and epoxy fluid resins. The maximum pressure that can be delivered by the pump is 40 bar. The flow rate is 1 litre in 55 cycles.
TREATMENT OF WALLS WITH DETERGENT AND SANITIZING PRODUCTS WITH ANTI-MOLD
Consilex Muffa Cleaner
Transparent, ready-to-use cleaning agent, for the safe removal of scale blackish incrustations from moulds and biodeteriogenic manifestations, as well as for the revitalising renewal of wooden surfaces.
Consilex Muffa Cleaner
Transparent, ready-to-use cleaning agent, for the safe removal of scale blackish incrustations from moulds and biodeteriogenic manifestations, as well as for the revitalising renewal of wooden surfaces.
Consilex Muffa Remover
Solution based on quaternary ammonium and peculiar active principles for the elimination of biodeteriogenic settlements: moulds, fungi, mosses, algae, lichens, bacteria, etc. from masonry works, in full respect of ecological protocols, with particular reference to biological building interventions and the restoration of vintage buildings and monuments. Over 150,000,000 square metres reclaimed, and 30 years of history, ensure product quality and effectiveness.
Consilex Muffa Remover
Solution based on quaternary ammonium and peculiar active principles for the elimination of biodeteriogenic settlements: moulds, fungi, mosses, algae, lichens, bacteria, etc. from masonry works, in full respect of ecological protocols, with particular reference to biological building interventions and the restoration of vintage buildings and monuments. Over 150,000,000 square metres reclaimed, and 30 years of history, ensure product quality and effectiveness.
REALIZATION OF AN OSMOTIC CEMENTITIOUS LAYER WITH RESISTANT THICKNESS IN COUNTERTHRUST
Osmocem RD
Osmotic fibre reinforced two-component cement mortar, based on hydraulic binders, modifying resins and flexibilisers, superpozzolanic reactive fillers, for the preparation of adhesive mixtures, easy to spread, which after hardening, provide an effective waterproofing protection, both in direct push and in negative pressure, with high capacity of deformation.
Osmocem RD
Osmotic fibre reinforced two-component cement mortar, based on hydraulic binders, modifying resins and flexibilisers, superpozzolanic reactive fillers, for the preparation of adhesive mixtures, easy to spread, which after hardening, provide an effective waterproofing protection, both in direct push and in negative pressure, with high capacity of deformation.
Sanareg
Non-film reactive liquid based on an alkylsilane emulsion dissolved in water to be used for the inhibition of saline efflorescence in the dehumidifying restoration of masonry, by spraying or applying with a brush with rigid bristles. Sanareg penetrates into the capillary pores of mineral substrates and reacts with the hydroxyl groups encountered in its path, forming an invisible water-repellent barrier that does not allow water to escape to the surface, leaving the transpiration to water vapor unaltered.
Sanareg
Non-film reactive liquid based on an alkylsilane emulsion dissolved in water to be used for the inhibition of saline efflorescence in the dehumidifying restoration of masonry, by spraying or applying with a brush with rigid bristles. Sanareg penetrates into the capillary pores of mineral substrates and reacts with the hydroxyl groups encountered in its path, forming an invisible water-repellent barrier that does not allow water to escape to the surface, leaving the transpiration to water vapor unaltered.
APPLICATION OF A COMPLETE CYCLE OF DEHUMIDIFYING, RESTORING, ANTI-CONDENSATION PLASTERS
Untersana
With the addition of mixing water only, this single-component premix creates a breathable, dehumidifying rough coating, preparatory to the application of restorative, dehumidifying, thermal-insulating and anti-condensation plasters, specifically Intosana, Sanatigh, Sanawarme and Caleosana, being plasters designed specifically for the healthiness of new buildings, existing buildings, works on green buildings and in the restoration of historic and monumental buildings.
Untersana
With the addition of mixing water only, this single-component premix creates a breathable, dehumidifying rough coating, preparatory to the application of restorative, dehumidifying, thermal-insulating and anti-condensation plasters, specifically Intosana, Sanatigh, Sanawarme and Caleosana, being plasters designed specifically for the healthiness of new buildings, existing buildings, works on green buildings and in the restoration of historic and monumental buildings.
Caleosana
A plaster for interiors and exteriors that is macroporous, in respect of green building standards, with high thermal insulation and anti-condensation performance, having a base of natural hydraulic lime NHL 3.5, siliceous aggregates, metakaolin, granular expanded silica with an extremely high volume of interconnecting voids and a low elastic modulus. Its particular characteristics make it suitable for dehumidification, for heat and humidity treatments on buildings and walls, in ecological building operations and in the restoration of historical buildings and monuments.
Caleosana
A plaster for interiors and exteriors that is macroporous, in respect of green building standards, with high thermal insulation and anti-condensation performance, having a base of natural hydraulic lime NHL 3.5, siliceous aggregates, metakaolin, granular expanded silica with an extremely high volume of interconnecting voids and a low elastic modulus. Its particular characteristics make it suitable for dehumidification, for heat and humidity treatments on buildings and walls, in ecological building operations and in the restoration of historical buildings and monuments.
Sanastof
A premix with a composition of breathable minerals for dehumidifying, with a base of natural hydraulic lime NHL 3.5, microsilicas with pozzolanic activity, selected aggregates, high tenacity microfibres and inert light unit weight thermal-insulating aggregates with a low elastic modulus. It is used for skimming and smoothing, both indoors and outdoors. This product is perfectly compatible with multiple substrates: lime-based plasters, lime cement, cementitious mortars, concretes, porous stone and brick. Its characteristics render it particularly suited to green building works and for restoring historic and monumental constructions. The maximum grain size of the aggregate is 0.9 mm.
Sanastof
A premix with a composition of breathable minerals for dehumidifying, with a base of natural hydraulic lime NHL 3.5, microsilicas with pozzolanic activity, selected aggregates, high tenacity microfibres and inert light unit weight thermal-insulating aggregates with a low elastic modulus. It is used for skimming and smoothing, both indoors and outdoors. This product is perfectly compatible with multiple substrates: lime-based plasters, lime cement, cementitious mortars, concretes, porous stone and brick. Its characteristics render it particularly suited to green building works and for restoring historic and monumental constructions. The maximum grain size of the aggregate is 0.9 mm.
Sanaxil P - Therm
Mineral paint for interiors and exteriors with potassium silicates, with strong adhesion characteristics on porous substrates, both for mineral combinations and for chemical bonds. It combines anti-condensation and insulating characteristics (thanks to the presence of 3M Glass Bubble hollow glass microspheres in the formulation) with strong resistance to mold and microorganisms (thanks to the natural alkaline pH of potassium silicate) and excellent hiding power (class 1 according to EN 13300 for a yield of 6/7 m2 / l). Sanaxil P - Therm due to its mineral nature, revolutionizes the concept of adhesion to the substrate, penetrating deeply into the porosity of the wall and then reacting with its components and forming a unique and indissoluble silicate bond.
Sanaxil P - Therm
Mineral paint for interiors and exteriors with potassium silicates, with strong adhesion characteristics on porous substrates, both for mineral combinations and for chemical bonds. It combines anti-condensation and insulating characteristics (thanks to the presence of 3M Glass Bubble hollow glass microspheres in the formulation) with strong resistance to mold and microorganisms (thanks to the natural alkaline pH of potassium silicate) and excellent hiding power (class 1 according to EN 13300 for a yield of 6/7 m2 / l). Sanaxil P - Therm due to its mineral nature, revolutionizes the concept of adhesion to the substrate, penetrating deeply into the porosity of the wall and then reacting with its components and forming a unique and indissoluble silicate bond.
DESIGN OF CORRECT VENTILATION AND PREPARATION OF A SUITABLE DEHUMIDIFIER
A dehumidifier
is a tool that allows you to dehumidify the air within a certain closed or poorly ventilated area, or stabilize the temperature below the so-called “dew point”, so as to prevent it from becoming condensate with all developments negative effects that condensation can subsequently cause.
The operation varies according to the type of dehumidifier, considering however that the water vapor present in the air decreases with decreasing temperature; usually the dehumidifiers inside them have a coil in which a coolant flows, when activated, the air passes inside this instrument and the water vapor condenses around the coil, absorbing the water and causing it to fall inside a collector to be subsequently disposed of.
One thing to note is that the dehumidifier does not lower the temperature inside a room, but on the contrary stabilizes it.
The final part of the dehumidifier, or another coil, has a higher temperature, this implies that after the passage of air inside the dehumidifier and after the water vapor has been absorbed, the air will continue its passage on the coil where it will be heated and then put back into circulation in the room.