How to deal with cracks in thermal insulation exterior walls?
Clicks: 【547】 Date: [2017/5/20 16:41:18]
First, carefully check the location of cracks, correctly identify the nature and type of cracks, analyze the causes, and then take corresponding remedial measures for different types of cracks. The treatment of structural cracks caused by the underlying structure below the thermal insulation layer can be divided into two types: cracks that require structural reinforcement treatment and those that do not require structural reinforcement treatment and only need crack reinforcement treatment. For cracks requiring structural reinforcement treatment, the insulation layer should be cut along the crack to extend 20 cm to 50 cm on both sides and cut off until the base of the cement or masonry, clean up and remove impurities, let the cracks be completely exposed, and then according to the relevant departments for reinforcement of the reinforcement Reinforcement is required. After confirming that the treatment is qualified, the insulation layer is repaired with the corresponding materials. Cracks between frame beams and columns and infill walls, and 45-degree oblique cracks at window angles that do not require structural reinforcement. The treatment method and steps are as follows: to expose the cracks in the base layer, the insulation layer is extended along the cracks to the sides by 20 cm to 50 cm and cut off until the base layer of the cement or masonry is removed, the impurities are removed, and the cracks are completely exposed. The crack reinforcement treatment is to cut V-shaped grooves along the cracks of more than 1 mm. The width and depth of the grooves depend on the site conditions. In the cleaned groove, fill in the caulking cement. After the caulking cement surface is dry, roll the exposed base layer with anti-cracking waterproof glue, and then lay the anti-crack reinforcing cloth. Roll-coat or batch-scrape anti-cracking waterproof glue on the cloth. For cracks less than 1 mm, roll the anti-crack waterproof adhesive directly on the completely exposed base cracks, and then lay a crack-resistant reinforcement cloth. On a flat crack-resistant reinforcement cloth, roll-coat or batch scrape the crack-resistant waterproof. Adhesive to form a high tensile strength, high flexibility and anti-cracking coating with the anti-cracking reinforcing cloth to strengthen the cracks.