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Paint Calculation Formula:
The Dulux Weathershield Paint Calculator estimates the amount of paint needed for exterior painting projects based on surface area, paint coverage rate, and number of coats required. It helps ensure you purchase the correct amount of paint for your project.
The calculator uses the paint calculation formula:
Where:
Explanation: The formula calculates the base amount needed for one coat (area divided by coverage rate) and multiplies by the number of coats required for complete coverage.
Details: Accurate paint calculation prevents wastage, ensures consistent color matching, and helps budget properly for painting projects. Overestimating leads to unnecessary costs, while underestimating can cause project delays.
Tips: Measure the total surface area accurately, check the paint can for coverage rate specifications (typically 10-16 m²/L for exterior paints), and consider applying 2-3 coats for optimal weather protection and color consistency.
Q1: What is the typical coverage rate for Dulux Weathershield?
A: Coverage rates vary by product and surface, but typically range from 12-16 square metres per litre for most exterior surfaces.
Q2: Should I include windows and doors in the area calculation?
A: No, subtract the area of windows, doors, and other non-paintable surfaces from your total wall area measurement.
Q3: How many coats are typically needed for exterior painting?
A: Most exterior projects require 2 coats for optimal coverage and durability, but 3 coats may be needed for dramatic color changes or poor surface conditions.
Q4: Does surface texture affect paint coverage?
A: Yes, rough or porous surfaces may require up to 20% more paint than smooth surfaces due to increased absorption.
Q5: Should I buy extra paint for touch-ups?
A: It's recommended to purchase 10-15% extra paint for touch-ups and future maintenance, especially for custom colors.