: Most standard 200mm blocks offer a 4-hour fire rating and can withstand temperatures up to 1,200°C . Strategic Buying Considerations
: Look for values around 0.08–0.20 W/(m·K) . Lower numbers indicate better insulation, which can reduce HVAC costs by up to 30% .
: High-quality blocks should have a tolerance of approximately ±1.5 mm . Precise sizing allows for "thin-bed" mortar (gluing), which reduces material waste and speeds up assembly.