Rajatheertha Construction & Real Estate News Blog

M20 vs M25 vs M30 Concrete Grades in 2026: Which Should You Use for a House? India | October 25, 2026 You are constructing a new independent house in Hyderabad. The contractor recommends M20 concrete for the roof slab. The structural engineer's drawings specify M25 for the columns and footings. A ready-mix supplier suggests upgrading everything to M30 because it is stronger. Now you face three questions. Is M20 sufficient for a residential house? Does M25 provide better protection for foundations and columns? And is the higher cost of M30 worth paying? Choosing concrete is not simply a matter of selecting the highest strength number. Different grades have different characteristic compressive strengths, and the required concrete grade depends on structural loads, exposure to moisture or chemicals, durability requirements and the approved engineering design. Under IS 456, the minimum grade of reinforced concrete increases as the environmental exposure becomes more severe. This matter...

Cracks in the Walls of a New House: Types, Causes and When to Worry India | October 23, 2026 You move into a newly constructed house. Within a few months, you notice a fine crack above a bedroom door. Another thin line appears where the brick wall meets an RCC column. After the first heavy monsoon rain, a longer crack becomes visible near an external window. Does this mean the house has a structural problem? Not necessarily. New houses can develop small cracks as plaster, mortar and other materials dry and respond to changing temperatures and moisture. Some cracks are largely cosmetic. Others can indicate poor workmanship, differential foundation movement, water damage or structural distress. The important question is not simply whether a crack exists. It is where the crack appears, what material it passes through, whether it is growing and whether the building shows other signs of movement. This guide explains the main types of new-house cracks, what they may indicate, when a qualifie...