看着家里发黄、掉皮的老墙面，焕新的冲动立马涌上心头。但等等！抄起滚筒就直接刷？大错特错！旧墙翻新，“七分准备，三分施工”。准备工序不到位，再贵的面漆也白费。今天，宏凯漆就化身你的家装监理，带你走一遍旧墙翻新必不可少的准备工作。
Looking at the yellowed, peeling old walls at home, the urge to refresh them surges instantly. But wait! Grab a roller and start painting right away? Big mistake! For old wall renovation, it’s "70% preparation, 30% construction". Inadequate preparation means even the most expensive topcoat is wasted. Today, Hongkai Paint acts as your home renovation supervisor, guiding you through the essential preparation steps for old wall renovation.
第一步：全面“体检”——诊断墙面问题
Step 1: Comprehensive "Checkup" — Diagnose Wall Issues
测强度：指甲划墙掉粉严重→基层粉化需处理
Test strength: Severe powder loss when scratching the wall with nails — substrate chalking requires treatment
查空鼓：敲击声音空洞→后期必开裂脱落
Check for hollow areas: Hollow sound when tapping the wall with a hammer or hand — will crack and peel later
找裂缝：排查墙面及阴阳角细微裂缝
Locate cracks: Inspect walls and internal/external corners for all minor cracks
辨污渍：检查水渍、霉斑、油污等顽固污迹
Identify stains: Check for stubborn stains such as watermarks, mold, oil stains, or glue marks
验旧漆：劣质仿瓷漆或剥落旧漆→彻底铲除
Test old paint: Inferior enamel-like paint (water-soluble) or peeling old paint — must be completely scraped off
第二步：对症下药——基层处理是关键
Step 2: Targeted Treatment — Substrate Preparation Is Key
彻底铲除：粉化、空鼓、脱落墙皮，铲至坚实基层
Complete scraping: Scrape off chalking, hollow, or peeling old wall skin until the solid substrate is exposed
裂缝修补：细微裂缝用弹性腻子填充；较宽裂缝凿V形槽，填修补石膏+贴防裂网格布+批腻子
Crack repair: Fill minor cracks with elastic putty; for wider cracks, chisel into a "V" groove, fill with repair gypsum, apply anti-crack mesh cloth, then scrape putty
污渍隔离：霉斑用除霉剂清除晾干；水渍/油污等打磨后，点刷抗碱封闭底漆封闭
Stain isolation: Remove mold with professional mold remover and let dry; sand watermarks/oil stains, then spot-apply anti-alkali sealing primer to block them from seeping out later
打磨平整：砂纸/打磨机磨平墙面，清除浮尘
Sanding for smoothness: Sand the entire wall with sandpaper or a sander (focus on removing uneven particles and burrs), then thoroughly clean dust with a feather duster or damp cloth
第三步：稳固根基——批刮腻子+涂刷底漆(不可省！)
Step 3: Solid Foundation — Scraping Putty + Applying Primer (Non-negotiable!)
批刮腻子：优质耐水腻子批1-2遍，找平并提供坚固均匀基层
Scraping putty: Apply 1-2 coats of high-quality water-resistant putty to level the wall and provide a solid, uniform substrate
刷抗碱封闭底漆：封闭余碱水分（防返碱发花）、增强附着力、节省面漆（涂刷更均匀）
Applying anti-alkali sealing primer: Seals residual alkali and moisture (prevents alkali efflorescence and discoloration), enhances adhesion, and saves topcoat (ensures more uniform application)
旧墙焕新，切忌急于求成。严格的基层处理，虽然耗费时间和精力，但却是“一劳永逸”的保障。宏凯漆全系产品（加固剂、腻子、底漆、面漆）提供系统化解决方案，让焕新效果长久在线！
Avoid rushing for results when renovating old walls. Strict substrate preparation, though time-consuming and labor-intensive, is a once-and-for-all guarantee. Hongkai Paint’s full range of products (reinforcer, putty, primer, topcoat) provides systematic solutions, ensuring long-lasting renovation results!
