What should I do if there are cracks and water seepage in the insulation rock slab of the exterior w

The treatment method for cracks caused by the lap of the mesh cloth is to remove the plastering mortar layer until the mesh cloth that is not lapped in place is completely exposed, and then re-embed the mesh cloth with flexible plastering mortar, so that the lap of the newly pasted mesh cloth and the original mesh cloth must be more than 8 cm on each side, and the flexible plastering mortar must completely cover the mesh cloth, and keep the flatness of the renovated surface and the old wall; Clean the wall, along the width of the crack part about 5 cm, directly roll the anti-crack waterproof adhesive, and press into the middle of the ultra-thin reinforced anti-crack cloth. With the acceleration of the development of external wall thermal insulation and the immaturity of technology, there is a phenomenon of falling off the external wall thermal insulation board, hollowing, cracking and water seepage of the external finish. The leakage of the outer protective layer seriously affects the thermal insulation performance of the insulation material, and may damage the structure of the outer protective layer, and at the same time, the existence, movement and freeze-thaw of water will also promote the deterioration of the wall structural material, induce the cracking of the wall, and lead to the basic leakage of the outer wall.

It brings great inconvenience to maintenance. Based on years of work experience, this paper expounds the prevention and control of cracks and water seepage in external wall insulation.

First of all, the location of the crack should be carefully inspected, the nature and type of the crack should be correctly identified, the cause of the crack should be analyzed, and then the corresponding remedial measures should be taken for different types of cracks. The treatment of structural cracks caused by the base structure below the insulation layer can be divided into two types: cracks that require structural reinforcement treatment and cracks that do not require structural reinforcement treatment. Cracks that need to be reinforced by the structure should be cut off by extending 20 cm and 50 cm along the cracks to both sides until the cement or masonry base, cleaning and removing impurities, so that the cracks are completely exposed, and then reinforcing according to the requirements of the relevant departments for reinforcement.

For the repair of the hollow drum and water seepage part of the insulation board. In the cracks, hollow drum parts of the original insulation board to clean up, on the cleaned base layer to roll coating interface agent again, after drying, the cut size of the polystyrene board pasted on the base layer, and then with a very flexible plastering mortar (in the mesh cloth) to repair the part, if necessary, add anchor bolts. Treatment method of thermal insulation and non-thermal insulation junction and plate through cracks.

Extend about 5 cm along the crack to both sides, shovel off the surface layer of the plastering mortar, retain the mesh cloth, apply anti-crack waterproof adhesive after cleaning, and clamp the anti-crack reinforcing cloth coating in the middle, and the surface of the repaired anti-crack coating can be consistent with the original wall flatness. Cracks and water seepage treatment caused by the failure to deal with the cracks, window sills, parapets and other details of the plastering mortar above the insulation layer. Clean the wall, directly roll the anti-crack waterproof joint patch glue on the window sill or parapet wall and other water seepage crack parts, and press an ultra-thin anti-crack reinforcing cloth in the middle.

In construction, exterior wall insulation rock wool board is often used. I believe many people have heard of it, but they don't know much about the specific role. In fact, the external wall insulation rock wool board is specially designed and produced for the external wall insulation thin plastering system of the building, and is suitable for the external wall insulation or energy-saving renovation of new or existing buildings with a foundation strength of concrete or brick walls and other dense structures.

Exterior wall insulation rock wool board is a special rock wool board for exterior wall insulation, Class A non-combustible fireproof insulation material, high compressive and tensile strength, low water absorption and moisture absorption, good dimensional stability, no thermal expansion or contraction, aging resistance, etc., can be compatible with the exterior wall system, and provide effective thermal insulation and energy saving, fire prevention and extreme climate protection and other properties for buildings.