The construction method of flexible putty powder for exterior wall mainly includes the following steps:
Base treatment: Before scraping the exterior wall putty, ensure that the wall is solid, clean, dry, and free of floating ash, oil stains and other dirt.
Ingredients: The ratio of dry powder to water is generally 1:06, that is, 1 ton of dry powder can be adjusted 16 tons of finished putty paste. According to the flatness of the wall, the amount of water added is appropriately increased or decreased. First, add four-fifths of the required amount of water to the mixing bucket, then add putty powder according to the water-to-powder ratio, stir while adding, according to the dryness of the stirring process, gradually add the remaining one-fifth of the water, and continue to stir until it is completely uniform. Let it stand for 10 minutes before use, and add an appropriate amount of water when it is found to be dry. After the putty powder is added to the mixing barrel, it should be fully stirred with a portable electric mixer, and the effect of hand mixing is not good, unless the amount is very small, let it stand for 10-20 minutes and stir it again to use.
Batch scraping: Use a trowel, scraper or putty knife to scrape the putty when scraping. The thickness of the batch scraping is 08-1.5mm, dosage 1-15kg/m²。The key points of batch scraping putty are solid, flat and light, that is, the putty is in close contact with the base layer, the bond is firm, and the surface is smooth and flat, so as to reduce the workload of grinding. When the base layer is highly absorbent, it should be sealed with a primer before scraping and repairing the putty, so as to prevent the moisture and rubber in the putty from being absorbed too much by the base layer and affecting the adhesion of the putty.
The putty should be scraped in batches at one time, and it is not appropriate to divide or make up batches, if necessary, the putty should be dried and smoothed with sandpaper before scraping the putty for the second time.
After the batch scraping is completed, the grinding process is generally carried out within 2-3 days. When grinding, a bulb of more than 200 watts should be irradiated close to the wall, and observation should be observed while grinding. Dust should be removed from the surface after sanding.
In the process of batch scraping, attention should be paid to keeping the construction environment clean to avoid dust, sundries and other mixed into the putty and affect the adhesion of the putty.
Attention should be paid to safety when scraping exterior wall putty, especially when working at height, anti-fall measures should be taken to ensure construction safety.
The above is the construction method of flexible putty powder for exterior wall for your reference. The specific construction steps and requirements may vary depending on the product brand and model, it is recommended that you read the product description carefully before use and follow the product requirements for construction.