Building Materials for a House in Indore, Bhopal and Madhya Pradesh: What to Use and Why

For a house in Indore, Bhopal or elsewhere on Madhya Pradesh's Malwa plateau, build the walls in fly ash brick or burnt clay brick, with AAC block on the west and south faces. Insulate the RCC roof and give it a reflective top, floor the house in Kota stone or the state's own sandstone, and keep black cotton soil out from under your floors. Then get the soil tested before anyone designs the footings.

Two things drive this: a dry May averaging 40 to 41 °C by day, and close to a metre of rain in four monsoon months. Prices below come from the MP PWD Schedule of Rates.

The climate, soil and earthquake facts that decide it

Composite: a hot May, a wet July, cool winter nights

IMD's climatological table for Indore (1991 to 2020) gives a mean daily high of 40.4 °C in May and a mean low of 10.3 °C in January. Rain averages 955 mm a year over about 46 rainy days, and about 92% of it falls from June to September. The table for Bhopal (Bairagarh) is a little hotter and wetter: 41.1 °C in May, 10.6 °C in January, and 1,101 mm a year, with July alone averaging 368 mm.

BEE's residential energy code, Eco-Niwas Samhita 2018, puts Indore, Bhopal, Gwalior and Jabalpur in the composite climate zone.

Black cotton soil over basalt

The Central Ground Water Board's Indore district report (2013) places the district in the heart of the Malwa plateau, on Deccan Trap basalt. It describes medium black soils 0.46 to 0.9 m thick, rich in lime and lime nodules. Its Bhopal district report (2013) says almost three-quarters of Bhopal district is covered with black cotton soil formed from weathered basalt, while Vindhyan sandstone and shale ridges run through and around Bhopal city.

Black cotton soil swells when wet and shrinks as it dries. Footings on it need a post of their own, which we are writing. Our guidance for now: commission a soil investigation before the engineer sizes anything.

Earthquake and wind

The earthquake code in force, IS 1893 (Part 1):2016, lists Bhopal in Seismic Zone II, with a zone factor of 0.10, and Jabalpur in Zone III, at 0.16. Indore is not in the code's town list. On the BMTPC Vulnerability Atlas earthquake map of Madhya Pradesh, drawn from the IS 1893 zone map, Indore city sits in Zone II, with the Zone III belt running along the Narmada valley a short way to the south.

BIS released a 2025 edition of the code with a new zone map in November 2025, then withdrew it in March 2026 and reverted to the 2016 standard, as ETV Bharat reported. For wind, IS 875 (Part 3):2015 gives Bhopal a basic wind speed of 39 m/s and Jabalpur 47 m/s.

Walls: fly ash brick first, AAC where the sun hits

The ash rule applies here

In minutes of the Fly Ash Management and Utilization Mission (October 2023), filed by MoEF&CC before the National Green Tribunal, the MP Pollution Control Board reported 15 thermal power plants in the state, generating 303 lakh tonnes of ash in 2022-23. State stations include Shree Singaji at Dongalia in Khandwa district and Satpura at Sarni in Betul district. By our own rough straight-line estimate, Indore and Bhopal are each within about 160 km of one of them.

That matters because of the January 2024 amendment to the ash notification, S.O. 05(E). Its paragraph B(8) says all building construction projects within 300 km of a coal or lignite power plant, including those of "all private agencies", shall use ash bricks, tiles or other ash-based products, provided they are available at no more than the CPWD or state PWD Schedule of Rates price. It does not say whether that binds a family's own house, so ask your architect and local authority. Either way, fly ash brick is not merely optional here.

The MP PWD Schedule of Rates specifies fly ash-lime bricks to IS 12894 in three strengths (50, 75 and 100 kg/cm²), and AAC blocks to IS 2185 (Part 3) at not less than 4 MPa. For a fuller comparison of the wall options, see red brick, AAC, fly ash or concrete block.

Heat through the wall

From Eco-Niwas Samhita's material values, our worked U-values for plastered walls (heat let through; lower is better) are:

• 230 mm burnt clay brick: about 2.3 W/m²K
• 230 mm fly ash brick: about 2.1 W/m²K
• 200 mm AAC block: 0.78 W/m²K, the figure in BEE's own worked example

Our guidance: Use brick or fly ash brick for most walls, and AAC on the west and south faces and around bedrooms that take the afternoon sun. The SoR's AAC item includes RCC bands at sill and lintel level. Ask for the BIS licence number and a dated test certificate.

Roof: the surface that takes the most sun

By Eco-Niwas Samhita's method, our worked figure for a bare 150 mm slab with 12 mm ceiling plaster is about 3.1 W/m²K. The code caps roofs at 1.2 W/m²K in every climate zone. Strictly, it covers residential projects on plots of 500 m² or more, though states and municipal bodies may lower that threshold.

Paint alone does not fix this: the code's annex on cool roofs says reflective finishes are not an alternative to the U-value limit and should go over a roof that already meets it.

The MP PWD Schedule of Rates carries both pieces: 40 mm of sprayed polyurethane foam under a 40 mm screed (item 12.45), which BEE's worked example puts at 0.47 W/m²K, and a high-albedo paint with a solar reflectance index of at least 108 (item 12.21). Our guidance: insulate first, finish the top pale or reflective, and slope it firmly to outlets sized for a July downpour. For terrace and wet-area detailing, see our guide to waterproofing a house by climate.

Floors, plinth and finishes

Local stone: sandstone, Kota stone and basalt

The Indian Bureau of Mines' Minerals Yearbook 2020 review of dimension stones says the Vindhyan and Satpura ranges in Madhya Pradesh have vast sandstone resources, with red, cream and white sandstone quarried extensively in Panna and Shivpuri districts and around Jabalpur. CGWB describes Bhopal's own Upper Bhander sandstone as reddish brown to purple, massive and well bedded.

Kota stone is a limestone quarried mainly just across the border in Rajasthan, around Kota, Jhalawar and Ramganjmandi. The Yearbook notes that this limestone belt extends into Madhya Pradesh. Both stones are routine MP Schedule of Rates items for flooring, steps and wall lining.

The SoR's own table of stone properties sets sandstone slabs at no more than 2.5% water absorption and at least 300 kg/cm² compressive strength, and basalt at 0.5% and 400 kg/cm². Basalt suits rubble plinths and boundary walls. Our guidance: use a rough, dressed or flamed finish on verandahs, steps and wet areas rather than mirror polish, for grip in the monsoon.

Keep black soil out from under the floor

The MP PWD Schedule of Rates 2024 is blunt. Its general notes say black cotton soil with a swelling index above 50% should not be used for filling under the plinth or under floors, and must be replaced with good earth. Its earthwork chapter bars it from backfilling and under floors. Soil that swells under a slab can crack it, so ask your contractor in writing what the plinth filling will be.

Plaster and finishes

Our guidance: finish external walls in a light colour, cut drip grooves under sills and chajjas, and make chajjas deep enough on the south and west to keep May sun off the glass and July rain off the frames.

Indicative prices: MP PWD Schedule of Rates 2024

For a whole-house budget, try MOA's home cost calculator. For approvals, see our guide to building permission and land diversion in Indore.

Mistakes to avoid

• Filling under the floor with excavated black soil. The MP PWD Schedule of Rates does not allow it, and neither should your contract.
• Designing footings without a soil report. Black cotton soil moves with the seasons.
• Painting the roof white and calling it insulated. A reflective coat helps, but a bare slab still lets through about 3.1 W/m²K against a limit of 1.2.
• Pricing clay brick without asking for fly ash brick. Within 300 km of a coal plant, the 2024 ash rule makes ash products the default where they meet the SoR price.

FAQ

Which is the best material for house construction in Indore?

Fly ash brick or burnt clay brick for most walls, AAC on the west and south faces, an insulated RCC roof with a reflective top, and Kota stone or sandstone floors. Keep black soil out of the plinth filling.

Is fly ash brick compulsory in Madhya Pradesh?

The 2024 ash notification amendment requires building projects within 300 km of a coal or lignite plant, including private agencies, to use ash-based bricks or products where they cost no more than the Schedule of Rates price. It does not say whether that binds a family's own house, so check with your architect and local authority.

What is the price of Kota stone flooring in Indore?

The MP PWD Schedule of Rates 2024 lists 25 mm Kota stone flooring, rubbed and mirror polished, at ₹1,174 per sq m (about ₹109 per sq ft) before GST, laid complete. It is an official benchmark, not a dealer quote.

Which seismic zone is Bhopal in?

Zone II, with a zone factor of 0.10, under IS 1893 (Part 1):2016. Indore city is also shown in Zone II on BMTPC's map, but the Narmada valley to the south, including Jabalpur, is Zone III.

An architect can match walls, roof and stone to your site, soil and budget. Find an architect on MOA, or see the studios in Indore on MOA.

Sources

• India Meteorological Department: Climatological table 1991 to 2020, Indore (accessed 16 Oct 2026)
• India Meteorological Department: Climatological table 1991 to 2020, Bhopal (Bairagarh) (accessed 16 Oct 2026)
• Bureau of Energy Efficiency: Eco-Niwas Samhita 2018 (Energy Conservation Building Code for Residential Buildings), copy on the Asia Pacific Energy Portal (accessed 16 Oct 2026)
• Central Ground Water Board: Ground Water Information, Indore District, Madhya Pradesh (2013) (accessed 16 Oct 2026)
• Central Ground Water Board: District Ground Water Information, Bhopal District, Madhya Pradesh (2013) (accessed 16 Oct 2026)
• Bureau of Indian Standards: IS 1893 (Part 1):2016, Criteria for Earthquake Resistant Design of Structures, via Internet Archive (accessed 16 Oct 2026)
• Building Materials and Technology Promotion Council: Vulnerability Atlas, 3rd edition: Madhya Pradesh Earthquake Hazard Map (accessed 16 Oct 2026)
• ETV Bharat: A Bold Policy Reversed: The Withdrawal Of India's 2025 Seismic Code, C P Rajendran, 11 Mar 2026 (accessed 16 Oct 2026)
• Bureau of Indian Standards: IS 875 (Part 3):2015, Wind Loads on Buildings and Structures, via Internet Archive (accessed 16 Oct 2026)
• Ministry of Environment, Forest and Climate Change: S.O. 05(E), 1 January 2024, amendment to the ash utilisation notification (accessed 16 Oct 2026)
• National Green Tribunal: Action Taken Report filed by MoEF&CC in OA No. 862 of 2022, including minutes of the 5th Fly Ash Management and Utilization Mission meeting, 19 Oct 2023 (accessed 16 Oct 2026)
• MP Power Generating Company: Shree Singaji Thermal Power Project, Khandwa (accessed 16 Oct 2026)
• MP Power Generating Company: Satpura Thermal Power Station, Sarni (accessed 16 Oct 2026)
• Indian Bureau of Mines: Indian Minerals Yearbook 2020, Slate, Sandstone and Other Dimension Stones (accessed 16 Oct 2026)
• Government of Madhya Pradesh, Public Works Department: Schedule of Rates for Building Work, Volume I, in force from 1 January 2024, listed on the MP PWD SoR page (accessed 16 Oct 2026)