Damp ascending

The damp ascending is one of the most common categories. Usually the effects of the natural evaporation are rings, damp areas and black mold. The progressive crystallization of the salts produces the pores obstruction and weakening of the surfaces; this fact brings the decay and the break up of the plastering. It’s essential to evaluate the nature and the salts solution of the walls.

The physical phenomenon of the damp ascending, is the main cause of the water absorption from the masonry. Masonries absorb water in an ascending manner. Various elements influence this process, like components and thickness of the masonry, nature of the soil and groundwater. This fact develops a boost of the liquids proportionally to the width of the area. It can also emerge in different ways depending from the adopted materials.

Fase 1

Recognized the area, it’s necessary to treat it wholly till the 50/60% above the max level of evaporation, identified by the hygrometer, marking off a straight line parallel to the ground.

Work on the row surfaces, if necessary remove paints, plastering and levelling through mechanical scratch or sandblast. Roughen the reinforced concrete if too smooth.

Fase 2

Remove the incoherent and soften areas which present dampness and black mold, till to reach the suitable surface. Hose down the area to treat.

Lay on the first coat of Hegea 2.0 and place the fibre net.

Fase 3

We suggest the utilize of fibre net 150/180 gr. square meter. Using the fibre net it’s not required to wait for the second application.

After at least 12 hours, damp again the area. Lay on a second coat of Hegea 2.0 (total thick about 5mm).

After at least 12 hours, damp and apply the finishing Hegea 0.8, 0.6 or 0.3 (total thick about 1mm).

Paint when dry (about 28 days) with well transpiring products: at a silica base, lime.

Observations

The only scratching of the surface and the reduced thickness of the cycle, offer the chance to gain suitable and appropriated surfaces and to act on any kind of problematic area in order to curing (e.g.: reinforced concrete), bearing down the costs, time and products.

The scratching of the surfaces, produce the only waste powders contained in the aspiration unit, and not rubbles, furthermore, acting on a low depth, it’s possible to work on plasters of low width with no modify the original thickness.

In a building subject to damp ascending, where forced the evaporation, the increased steam rise the absorbed water from the foundations. The curing Hegea system, when firmed up the surfaces, acts in those areas easy to falling down. It allows to reach a gradual unchangeable condition among underneath wet coats and restored top areas, without the risk of black mold or crystallization.