How to make exterior wall coating face-lifting

1. Approved by the new cement mortar and concrete surface after a period of time is ventilated, dry and maintenance, make metope is completely dry, make metope is less than 10% moisture content, ph value is less than 10 rear can construction. In general, under the condition of 25 degrees c and 65% relative humidity, dry cement mortar wall should be more than 7 days, dry concrete wall should be 21 days or more. 2. For cast-in-place or precast concrete basement, need a long curing period, the release agent and the surface is completely removed. 3. Weathering sand concrete base and water imbibition is strong, light crude wet coating process should be adopted in cement plaster layer primer. 4. Use wire brush to remove at the grass-roots level on the crystal, the serious alkaline bleach, cleaning repeatedly with 5% oxalic acid aqueous solution, and then clean with clear water. 5. For bearing capacity, loose, without peeling old coating, should be thoroughly remove with putty. After the clean and dry, with be bored with child make level. For powder light but sturdy old coating, polishing and primer blotted out. Severe pulverization old coatings should be thoroughly clean, ahead of old oily coating shall be removed completely. 6. Pollution is serious at the grass-roots level shall be kept clean. By the wall of the fungi and algae erosion can be removed by mechanical methods, or treated with bleaching solution, rinse and dry after leveling. 7, local deep groove should be filled with cement mortar, local bump should be leveling. Basic metope besmear to be bored with child before, must be strong enough. There should be no, defects such as cracks and loose sand. 8. Before brushing primer, with waterproof putty to repair the damage, cracking, and the uneven walls. Each batch of be bored with child thickness control in less than 2 mm, total thickness no more than 5 mm. Be bored with child should be strong enough, can not crush, peeling or cracking. 9. Be bored with child after dry, with sand paper burnish, use wet cloth to wipe the float ash on the be bored with child, and paint as soon as possible, lest drop ash again. 10. Coating surface must be strong, not to take off the loose sand, crack, and defects such as peeling off. Coating surface must be clean, no dust, dirt, grease, mold and other accessories.