Hireandbuild
Porotherm Bricks in Chennai (2026): Price, Sizes, Pros and Cons
The short answer
Porotherm bricks are hollow clay blocks made by Wienerberger from natural clay, rice husk and coal ash. In Chennai (September 2026): ₹55–₹90 per brick depending on size. They are 60% lighter than red bricks, provide better thermal insulation, and are best suited for exterior and partition walls in independent houses. Available through Wienerberger authorised dealers in Chennai.
Porotherm bricks have become one of the most discussed construction materials in Chennai over the last three years. At HireAndBuild, we get this question from clients almost every week — especially from homeowners building in Porur, Guduvancheri and Tambaram where larger plots allow independent house construction. In this guide, we cover everything you need to know about porotherm bricks: what they are, current Chennai prices, all available sizes, honest advantages and disadvantages, and how they compare against red bricks and AAC blocks — based on our experience delivering 250+ homes across Chennai since 2020.
What Are Porotherm Bricks? — How They're Made and Who Makes Them
Porotherm bricks are perforated hollow clay bricks manufactured by Wienerberger, an Austrian multinational company and the world's largest producer of clay building materials. In India, Wienerberger produces Porotherm bricks under the brand name “Porotherm Smart Bricks.”
The bricks are made from:
- Natural clay (de-silted from dead water tanks)
- Rice husk
- Coal ash
- Granite slurry
- Sawdust
These raw materials are mixed, moulded into hollow perforated shapes, and fired in kilns at over 1,000°C. The hollow vertical perforations running through each brick are what give Porotherm its key properties — lighter weight, better insulation, and faster construction.
| Porotherm Bricks — Key Facts | |
|---|---|
| Manufacturer | Wienerberger India |
| Raw material | Natural clay + rice husk |
| Manufacturing | Kiln-fired at 1,000°C+ |
| BIS standard | IS 3952 |
| Available in Chennai | Yes |
| Also called | Porotherm blocks, hollow clay bricks, clay blocks |
Note: “Porotherm blocks” and “porotherm bricks” refer to the same product. Blocks are simply the larger size variants (above 200mm width).
Porotherm Bricks Price in Chennai (2026) — Per Brick, Per Sqft & Total Cost
The price of porotherm bricks in Chennai varies by size. Larger bricks cost more per unit but cover more area, so the cost per sqft of wall often remains competitive with red brick construction.
| Size | Price/brick | Bricks/sqft | Wall cost/sqft | Best use |
|---|---|---|---|---|
| 4 inch | ₹40–₹50 | 10–11 | ₹440–₹550 | Internal partitions |
| 6 inch | ₹55–₹65 | 7–8 | ₹440–₹520 | Exterior walls (most common) |
| 8 inch | ₹65–₹80 | 5–6 | ₹390–₹480 | Exterior + load walls |
| 9 inch | ₹75–₹90 | 4–5 | ₹360–₹450 | Load-bearing walls |
Prices are site-delivered Chennai rates for September 2026, inclusive of 18% GST. Prices may vary by 10–15% based on quantity ordered and delivery location. Call +91 72004 72008 for current project pricing.
Compare that with red brick: ₹8–₹12 per brick, needs about 35 bricks per sqft = ₹280–₹420 per sqft (but higher plastering cost adds ₹60–₹100/sqft). Porotherm total wall cost is often 10–15% higher, but savings on plastering partially offset this. Special ZeroPlus thin-bed mortar adds ₹15–₹25 per sqft to labour cost vs regular mortar.
Porotherm Bricks Cost for a Full House in Chennai
A standard 1,200 sqft single-floor house has approximately 1,800–2,000 sqft of wall area. Using 6-inch porotherm at ₹440–₹520/sqft:
- Total material cost: ₹7.9 lakh – ₹10.4 lakh
- vs red brick equivalent: ₹7.0 lakh – ₹9.0 lakh
- Difference: ₹90,000 – ₹1.4 lakh more for porotherm
- But: savings on plastering = ₹40,000 – ₹70,000
- Net extra cost for porotherm house: ₹50,000–₹70,000
Is the extra cost worth it? See our advantages section below. You can also price your own plot size with our free house construction cost calculator.
Porotherm Bricks Sizes — All Variants with Dimensions and Weight
Porotherm bricks are available in four standard thickness variants. All variants share the same length (400mm) and height (200mm) — only the width/thickness changes.
| Type | Dimensions (L×H×W) | Weight | Hollow % | Best for |
|---|---|---|---|---|
| 4 inch | 400×200×100 mm | 9–10 kg | 45% | Internal partition walls |
| 6 inch | 400×200×150 mm | 11–13 kg | 47% | External walls (most popular) |
| 8 inch | 400×200×200 mm | 13–16 kg | 50% | External + structural walls |
| 9 inch | 400×200×230 mm | 15–18 kg | 52% | Load-bearing walls, G+2 |
Note: Standard red brick dimensions are 230×110×75 mm, weighing 3–3.5 kg each. While each red brick is lighter, you need 3× more of them per sqft of wall area.
Which Size is Best for Chennai Houses?
For most Chennai independent houses, we recommend:
- 6 inch porotherm for all exterior walls (balances cost, insulation and availability)
- 4 inch porotherm for internal partition walls
- 8 or 9 inch only where structural design specifically requires it
Porotherm Bricks Advantages and Disadvantages — Honest Review from 250+ Chennai Homes
Advantages
✅ Thermal insulation — 45% better than red bricks
The hollow perforations trap air, which is a natural insulator. In Chennai's climate, rooms using porotherm walls typically stay 3–5°C cooler than rooms with red brick walls — reducing AC running time and electricity bills.
✅ Lighter structural load — 60% lighter than conventional bricks
Reduced dead load means your RCC frame (columns, beams, slabs) can be designed slightly lighter. This can reduce structural steel cost by 5–8% on a typical Chennai independent house.
✅ Faster construction — 2.5× more area per day
One mason can lay 30–40 sqm of porotherm wall per day vs 12–15 sqm with red bricks. For a 1,200 sqft house, this saves approximately 8–12 working days on brickwork alone.
✅ Less plastering required
Uniform factory dimensions mean only 6–10mm plaster thickness needed vs 15–20mm for red brick. This saves material cost and reduces wall thickness (gaining 1–2 inches of room space).
✅ Superior acoustic insulation
The hollow structure absorbs sound waves. Particularly beneficial for houses near main roads, which is common in Chennai outskirts like GST Road and OMR.
✅ Eco-friendly manufacturing
No fertile topsoil is used (unlike red bricks). Raw materials are recycled waste — coal ash, rice husk, granite slurry. 150-year lifespan means no early replacement waste.
✅ Fire resistant
Kiln-fired at 1,000°C+, with fire rating F240 (withstands extreme heat for 240 minutes). Better fire safety than most alternatives.
✅ 95% less water during construction
Uses ZeroPlus thin-bed mortar that requires minimal water — important for sites in Chennai where water supply to construction sites can be limited.
Disadvantages
❌ Higher per-brick cost than red bricks
₹55–₹90 per porotherm brick vs ₹8–₹12 per red brick. Even though fewer bricks are needed per sqft, the overall wall cost is 10–15% higher. For a budget-conscious build on our Basic package (₹1,999/sqft), red brick remains the practical choice.
❌ Requires special ZeroPlus thin-bed mortar
Regular cement mortar cannot be used. ZeroPlus mortar must be sourced from Wienerberger dealers and costs more than standard mortar. Some Chennai masons try to use regular mortar — this compromises the wall's performance significantly.
❌ Limited availability in some Chennai areas
Wienerberger has authorised dealers in Chennai, but availability in distant outskirts like Singaperumalkoil, Padappai and Tiruvallur can be inconsistent. Delivery lead time: 3–7 days (vs next-day for red bricks).
❌ Needs trained masons
The laying technique differs from red bricks. Masons unfamiliar with porotherm often make errors — wrong mortar, wrong joint thickness, skipping the parge coat. At HireAndBuild, we brief our site supervisors specifically on porotherm installation before the project starts.
❌ Not ideal for curved or arched features
The large block size limits use in curved walls, arched openings, or decorative features. Red brick or AAC block is more flexible for unusual shapes.
❌ High efflorescence risk near water
When exposed to moisture, porotherm can develop white powdery deposits (efflorescence). In Chennai's monsoon season, this is a real concern — proper waterproofing at external joints is essential.
❌ Not suitable for high-rise structures
Best for G+1 and G+2 residential buildings. For 3+ floors or commercial structures, structural engineers may specify alternatives.
HireAndBuild's honest verdict
Porotherm bricks are worth the extra ₹50,000–₹70,000 cost for a 1,200 sqft Chennai home IF you value cooler rooms, faster construction, and long-term energy savings. We recommend them in our Standard (₹2,299/sqft) and Premium (₹2,649/sqft) packages. For Basic package builds, red brick remains the practical choice.
Porotherm Bricks vs Red Bricks vs AAC Blocks vs Cement Bricks — Full Comparison
| Factor | Porotherm | Red Brick | AAC Block | Cement Brick |
|---|---|---|---|---|
| Price per sqft wall | ₹440–₹550 | ₹350–₹450 | ₹480–₹600 | ₹320–₹420 |
| Weight (per unit) | 9–18 kg | 3–3.5 kg | 7–10 kg | 5–7 kg |
| Units per sqft | 4–11 | 30–35 | 4–6 | 12–15 |
| Thermal insulation | Very good | Poor | Excellent | Average |
| Sound insulation | Good | Average | Good | Average |
| Plastering needed | 6–10mm | 15–20mm | 6–10mm | 10–15mm |
| Construction speed | Very fast | Slow | Fast | Medium |
| Fire resistance | F240 rated | Medium | Good | Good |
| Water absorption | Low | High | Medium | Low |
| Eco-friendly | Yes | No | Yes | Partial |
| Availability Chennai | Medium | High | High | High |
| Best for | Exterior walls | Budget builds | Premium insulation | Commercial use |
Which Should You Choose for Your Chennai Home?
- Budget build (Basic ₹1,999/sqft): Red brick — most available, lowest cost
- Standard build (₹2,299/sqft): Porotherm 6-inch exterior + red brick partition
- Premium build (₹2,649/sqft): Porotherm throughout or AAC for max insulation
- Luxury build (₹2,999/sqft): AAC block or full porotherm with exposed finish
For the full package breakdown, see our guide to construction cost per sqft in Chennai.
How to Install Porotherm Bricks — Step-by-Step Process
- Prepare the base course. A sand-cement mortar bed is laid on the floor slab before the first course. Bricks are levelled horizontally and vertically using a plumb and string.
- Mix ZeroPlus thin-bed mortar. ZeroPlus is a specially formulated mortar by Wienerberger — fine-ground sand, cement and additives. Mix with minimal water to a thick paste consistency. Do NOT substitute with regular cement mortar. If you are comparing binders, our note on the best cement for house construction is a useful starting point — but Porotherm still needs ZeroPlus, not a generic mix.
- Apply mortar using Porotherm roller. The roller applies a thin, even 1–3mm mortar bed across the top of each brick course. This thin joint is the key difference from conventional bricklaying.
- Lay bricks and check alignment. Place each brick in running bond pattern (joints offset by half-brick length). Use a rubber mallet to seat each brick firmly. Check vertical alignment every 3 courses.
- Cut bricks to fit. Porotherm bricks can be cut using an angle grinder or wet saw. Soak briefly in water before cutting to reduce clay dust.
- Apply parge coat on completion. After the wall is complete, apply Poroparge or Eco-parge coating to the internal face — fills all vertical perforations and provides a smooth base for final plastering.
Important note for Chennai projects
Ensure your site supervisor specifically briefs the mason on ZeroPlus mortar usage. The most common installation error on Chennai projects is masons using regular cement mortar — this eliminates most of the thermal and structural benefits of porotherm.
— Dilipan Bose, HireAndBuild
Porotherm Bricks in Chennai — What We've Learned Across Our 250+ Home Projects
At HireAndBuild, we have evaluated porotherm bricks extensively across our projects in Chennai and its outskirts. Here is what we have observed on actual construction sites — not manufacturer claims, but real performance data. That site work sits inside our turnkey construction in Chennai model, from drawings through handover.
Where we use porotherm:
- Included as standard in our Standard (₹2,299) and Premium (₹2,649) packages
- Particularly recommended for homes in Porur, Velachery, Medavakkam and Tambaram — areas where clients report high summer heat inside conventional red brick homes. If you are planning house construction in Chennai around Porur or Guduvancheri, this is one of the first material calls we discuss.
- For outskirt projects in Guduvancheri and Vandalur, where delivery is available within 5 days
What our clients report after moving in:
- “The rooms are noticeably cooler — we run the AC 2 hours less per day” — common feedback
- Lower electricity bills during Chennai summers (March–June)
- Rooms are quieter — important for families with young children
The one challenge on site: mason briefing is non-negotiable. Our site supervisor attends the first day of porotherm laying on every project. Once masons understand the ZeroPlus mortar technique, they actually prefer porotherm — it's easier to lay than red bricks at scale.
Our honest recommendation: if your budget allows Standard package or above, porotherm exterior walls deliver a meaningful improvement in comfort for Chennai's climate. The extra ₹50,000–₹70,000 for a 1,200 sqft house pays back in AC electricity savings within 4–6 years.
Where to Buy Porotherm Bricks in Chennai — Dealers and Availability
Porotherm bricks are available exclusively through Wienerberger India's authorised dealer network. They are NOT available at general building material shops or unbranded suppliers.
How to source in Chennai:
- Contact Wienerberger India directly at their Chennai regional office for nearest dealer
- Ask your contractor — established contractors like HireAndBuild have direct dealer contacts
- Verify the dealer is Wienerberger-authorised (ask for the dealer certificate)
Typical lead times in Chennai:
- Central Chennai areas: 3–5 working days
- OMR / ECR corridor: 4–6 working days
- Outskirts (Guduvancheri, Vandalur, Tambaram): 5–7 working days
Pro tip: Order porotherm bricks before your foundation work is complete. Brick laying typically starts 6–8 weeks after foundation — ordering in advance ensures no site delays.
Can HireAndBuild source it for your project? Yes. If you are building with HireAndBuild under our Standard or Premium package, we source and manage porotherm procurement directly. You do not need to contact dealers separately.
Call +91 72004 72008 to discuss your project.
Frequently Asked Questions — Porotherm Bricks in Chennai
What is the price of porotherm bricks in Chennai in 2026?
Porotherm bricks in Chennai cost ₹40–₹90 per brick depending on size. The 6-inch variant (most common for exterior walls) costs ₹55–₹65 per brick site-delivered in September 2026. Per sqft of wall, expect ₹440–₹550 including labour and ZeroPlus mortar.
What are the standard sizes available for porotherm bricks?
Porotherm bricks are available in 4 sizes: 4-inch (400×200×100mm), 6-inch (400×200×150mm), 8-inch (400×200×200mm) and 9-inch (400×200×230mm). The 6-inch is most commonly used for exterior walls in Chennai independent houses.
What are the main disadvantages of porotherm bricks?
The main disadvantages are: higher per-brick cost than red bricks, requires special ZeroPlus thin-bed mortar (not regular cement mortar), limited Chennai dealer availability, needs trained masons, and can develop efflorescence (white powder) when exposed to moisture without proper waterproofing.
Are porotherm bricks better than red bricks for Chennai houses?
For thermal comfort, yes — porotherm keeps rooms 3–5°C cooler in Chennai summers. For budget, no — red brick is ₹50,000–₹70,000 cheaper for a 1,200 sqft house. HireAndBuild recommends porotherm for Standard and Premium package builds where the extra cost is justified by long-term comfort and energy savings.
How much does porotherm brick construction cost per sqft in Chennai?
Porotherm brickwork costs ₹440–₹550 per sqft of wall in Chennai (September 2026 rates), including materials, ZeroPlus mortar and labour. Red brick equivalent: ₹350–₹480 per sqft (excluding the higher plastering cost).
Who manufactures porotherm bricks in India?
Wienerberger India is the sole manufacturer of Porotherm bricks in India. Wienerberger is an Austrian multinational and the world's largest clay brick manufacturer. Their Indian operations produce Porotherm Smart Bricks from multiple plants across India.
Can porotherm bricks be used for roofing in Chennai homes?
Yes. Wienerberger produces special Porotherm roof blocks designed as permanent formwork for biaxial ribbed slab systems. They reduce concrete usage, add thermal insulation to the roof slab, and reduce overall slab weight. Suitable for Chennai homes where roof heat is a major issue.
Where can I buy porotherm bricks in Chennai?
Through Wienerberger India's authorised dealers in Chennai. Delivery lead time: 3–7 working days depending on your location. If building with HireAndBuild under our Standard or Premium package, we handle procurement directly. Call +91 72004 72008.
Build With Porotherm Bricks in Chennai — Get a Free Cost Estimate
HireAndBuild offers porotherm brick construction across Chennai and all major outskirts including Porur, Poonamallee, Guduvancheri, Tambaram and 17 more localities.
Porotherm is included as standard in our Standard package (₹2,299/sqft) and Premium package (₹2,649/sqft). For a 1,200 sqft single-floor house: Standard with porotherm ₹27.59 lakh, Premium with porotherm ₹31.79 lakh.