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G4 AAC lightweight blocks, class 4 to TIS 1505, about 500-700 kg/m³ and 40 kg/cm² or more in compression. Stronger than G2 and better for heavy fixings, for condos, high-rise and engineered walls. 7-25 cm from Q-CON, THAICON, TPI, Aerocrete and Smart Block.
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Select the right AAC Block Tools & Accessories
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What are G4 AAC blocks?
G4 AAC blocks are class 4 blocks under TIS 1505-2541, with a dry density of about 500-700 kg/m³ and a compressive strength of 40 kg/cm² or more, roughly twice that of G2. The denser body is stronger, withstands impact better and holds anchors for heavy loads, while still being much lighter than clay brick.
Applications and brands
- Condos, high-rise, hotels and office buildings where the designer specifies class 4.
- Walls that carry wall-hung cabinets, shelves or wall-mounted sanitary ware.
- THAICON G4 (Super Pro), 7-20 cm, and Q-CON G4, 7.5-25 cm, both available by the full truck.
- TPI G4, Aerocrete G4 and Smart Block G4, 7-20 cm.
Benefits of G4 AAC blocks
Higher strength means fewer chipped blocks in transport and on site, walls that resist impact, and fire resistance of 4 hours or more according to the manufacturers. For ordinary houses where heat insulation and cost matter most, G2 AAC blocks are enough. The table compares the two grades.
G2 (class 2) | G4 (class 4) | |
|---|---|---|
Dry density | About 400-500 kg/m³ | About 500-700 kg/m³ |
Compressive strength | 20 kg/cm² or more | 40 kg/cm² or more |
Strength | Lighter, better heat insulation | Stronger, better for heavy fixings |
Best for | Non-load-bearing walls, houses, townhomes | Condos, high-rise, engineered walls |
Brands | Q-CON Extra Cool, Diamond, DURA One | Q-CON, THAICON, TPI, Aerocrete, Smart Block |
Buy G4 AAC blocks at OneStockHome
OneStockHome carries G4 AAC blocks from 5 brands. Order by the block or by the full 6-wheel or trailer truck at a lower per-block price, with delivery charged by weight, and add AAC masonry mortar, AAC plaster and AAC anchors to the same order. Further reading: G2 vs G4 AAC blocks
