In construction projects, wall coatings and plastering systems affect not only appearance, but also durability, waterproofing performance, and long-term maintenance costs.
Many projects experience problems such as:
Exterior wall cracking and peeling
Efflorescence and chalking
Damp stains in bathrooms
Uneven corners and edges
Cracks between walls and ceilings
Although these seem like surface defects, most are actually caused by substrate treatment, material selection, and improper construction practices.
1. Exterior Wall Paint Cracking & Peeling
Main Causes
Plaster applied too thick without layered application
Dust remaining on substrate before coating
No mesh reinforcement at different substrate joints
Poor quality exterior putty
Painting before walls are fully dry
Prevention Solutions
Apply plaster in layers with proper curing
Remove all sanding dust before painting
Use mesh reinforcement at wall junctions
Select weather-resistant exterior putty
Avoid construction under rain or strong sunlight
2. Damp & Peeling Walls in Bathrooms and Balconies
Main Causes
Insufficient waterproofing height
Waterproof layer damaged during later works
Poor tile joint sealing
Improper slope causing water accumulation
Prevention Solutions
Waterproofing height in shower areas should exceed 2000mm
Conduct 24-hour water retention test after waterproofing
Use sealant at wall-floor joints
Ensure proper drainage slope
3. Efflorescence, Chalking & Peeling on Exterior Walls
Main Causes
High alkalinity of substrate
Poor water resistance of paint
Low quality putty
Construction during rain or low temperature
Excessive water added during mixing
Prevention Solutions
Apply coating only after proper curing age
Use alkali-resistant primer
Select water-resistant coating systems
Control water addition strictly
4. Cracks Between Wall and Ceiling
Main Causes
Different shrinkage rates of materials
No anti-crack mesh reinforcement
Poor treatment at pipe groove repairs
No corner protection between ceiling and wall
Prevention Solutions
Install mesh at material transition areas
Use polymer anti-crack mortar for groove repair
Install PVC corner beads at ceiling joints
5. Uneven Plaster Surface & Poor Corner Alignment
Main Causes
No leveling guides before plastering
Plaster applied too thick at one time
Different water absorption of substrates
Premature finishing before setting
Prevention Solutions
Use laser or leveling guides
Apply plaster in layers
Pre-wet wall surfaces
Use corner tools for alignment
Construction Quality Depends on More Than Materials
Most wall failures are not caused by paint quality alone.
The real key factors include:
Substrate strength
Moisture control
Plastering process
Material compatibility
Site management
Only when substrate, mortar, putty, and coating systems work together properly can long-term wall durability be achieved.
ARICH focuses on construction additives for drymix mortar systems, including:
HPMC / MHEC
Redispersible Polymer Powder (RDP)
Tile Adhesive Solutions
Skim Coat & Putty Systems
Gypsum & Plaster Solutions
评论
发表评论