Are Porotherm bricks good or bad? Porotherm bricks are good for many modern wall construction projects when used in the right place, with trained labour and proper detailing. They are hollow clay blocks designed to reduce wall weight, improve thermal comfort, and support faster masonry work. However, they may not be ideal where local availability is poor, workers are inexperienced, or heavy fixtures must be installed without correct anchoring. This guide explains their advantages, disadvantages, uses, limitations, and how to decide whether they are suitable for your house.
Quick Summary
Porotherm bricks are generally good for non-load bearing walls, partitions, and energy-efficient house construction because they are lightweight hollow clay blocks with good thermal insulation. They may be a poor choice if workmanship is weak, blocks are not locally available, or the wall needs heavy loads, chasing, or anchoring without proper method.
What Are Porotherm Bricks?
Porotherm bricks are hollow clay blocks used for masonry walls. They are made from clay and designed with perforations or cavities that reduce weight and improve insulation. They are commonly used for internal walls, external walls, partitions, residential buildings, apartments, commercial buildings, and other masonry applications.
The hollow design is the main difference between Porotherm bricks and traditional solid red bricks. The air cavities reduce dead load and help improve indoor thermal comfort. Wienerberger states that Porotherm walls are made from clay and that genuine Porotherm clay bricks carry the brand name, batch number, and date of manufacture.
Are Porotherm Bricks Good or Bad? Quick Verdict
|
Question |
Answer |
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Are Porotherm bricks good? |
Yes, for lightweight, thermally efficient, well-planned wall construction. |
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Are they bad? |
No, but they can perform poorly if used without correct workmanship or detailing. |
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Best use |
Non-load bearing walls, partitions, external walls, and framed structures. |
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Main benefit |
Lower wall weight and better thermal comfort. |
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Main concern |
Cost, availability, fixing details, and labour familiarity. |
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Best decision |
Choose after checking design, supplier support, and site skill. |
Porotherm bricks are best treated as a specialised walling material, not a direct one-to-one replacement for every brickwork situation.
Advantages & Disadvantages of Porotherm Bricks
Advantages
- These bricks are strong and durable and can be used as both load-bearing and non-lead-bearing walls of the structure.
- They are lightweight and easy to handle. This reduces the chances of breaking bricks while carrying them to the upper floors.
- The lightweight nature of the bricks reduces the overall dead load and cost of the structure.
- These bricks are highly durable and can withstand for a longer period of time, up to 150 years.
- These bricks have excellent thermal and acoustic insulation that helps build more secure rooms and structures without being affected by external noises and temperatures.
- These bricks are highly resistant to fire and water, so they can be used in extreme weather conditions and be applied in all types of construction.
- These bricks are made completely using natural resources and waste (i.e., slurry & fly ash), making them eco-friendly and suitable for constructing green buildings.
- These bricks can help the building maintain the room temperature throughout the year. They keep the structure cool during summer and warm during winter.
- The lightweight nature and easy handling make it easy to install, maintain, and repair.
- Using Porotherm bricks instead of traditional bricks reduces the construction time.
Disadvantages
- Due to low density and high water pressure, these bricks cannot be used for large, high-rise structures, especially in the foundation and base slab.
- These bricks have high efflorescence when exposed to water. They form a white powdery layer on the bricks, affecting the structure’s unplastered aesthetic.
- The manufacturing process and construction using these bricks require skilled labour.
- The availability of these bricks is limited and high demand raises the price.
Porotherm Bricks vs Red Bricks
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Factor |
Porotherm Bricks |
Red Bricks |
|
Structure |
Hollow clay block |
Usually solid burnt clay brick |
|
Weight |
Lighter |
Heavier |
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Construction speed |
Faster due to larger size |
Slower due to smaller unit size |
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Thermal comfort |
Better due to hollow cavities |
Lower compared with hollow clay blocks |
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Labour familiarity |
Needs trained handling |
More familiar to most masons |
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Fixing heavy items |
Needs correct anchors |
Easier in many cases |
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Availability |
Location-dependent |
Widely available |
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Cost |
May be higher initially |
Usually lower locally |
Porotherm bricks are better where lightweight construction and thermal comfort matter. Red bricks may be more practical where local labour, low cost, and easy availability are priorities.
Porotherm Bricks vs AAC Blocks
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Factor |
Porotherm Bricks |
AAC Blocks |
|
Main material |
Clay |
Cement, lime, sand or fly ash, and aeration process |
|
Structure |
Hollow clay block |
Lightweight cellular block |
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Weight |
Lightweight |
Lightweight |
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Thermal insulation |
Good |
Good |
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Water behaviour |
Product-dependent |
Requires proper plastering and protection |
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Fixing |
Needs suitable anchors |
Also needs suitable anchors |
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Cutting |
Can be cut, but care is needed |
Generally easy to cut |
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Finish |
Clay-based masonry finish |
Block-based finish |
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Selection basis |
Availability, climate, design, cost, labour skill |
Availability, cost, quality, and wall use |
Both materials can work well when sourced from reliable suppliers and installed properly. The better choice depends on the project, not only the material name.
Are Porotherm Bricks Suitable for your Project?
Porotherm bricks are applicable in almost all types of construction and are one of the most preferred brick types in modern construction fields. Here, we look at some factors that will help you understand why Porotherm bricks could suit your dream construction project.
- These bricks are 60% lightweight compared to conventional building materials, which reduces the dead load and the overall structural cost.
- The lightweight nature of the brick makes it easy to handle, boosting the construction speed.
- They are good thermal insulators and are 45% more efficient in resisting heat than traditional construction materials.
- The brick’s thermal properties save energy on heat reduction and air consumption.
- The raw materials used in producing porotherm bricks use clay from de-silted dead water tanks and natural additives such as coal ash, sawdust, and rice husk. Using waste materials makes it an eco-friendly brick option, credited by the Indian Green Building Council for ratings.
- Porotherm bricks consume less water for the manufacturing and construction process when compared to other building materials.
- They have a high compressive strength of 10 N/mm², which is comparatively greater than concrete bricks. This high compressive strength makes it applicable for load-bearing structures.
- These bricks are highly durable, can last for more than 150 years, and are an ideal material for permanent structures.
- These bricks can be recycled and reused and are ideal for Green Buildings.
Recommendations of Porotherm Bricks for Specific Projects
Although Porotherm bricks are used for various construction projects, they cannot be employed in certain structures. Here are some factors that affect the usability of Porotherm bricks in specific projects.
- Porotherm bricks have a density of 694 to 783 kg/m³, which is comparatively lower than conventional bricks. This makes them unsuitable for large structures.
- The Porotherm bricks have a water absorption ratio of 15%, which is higher than clay bricks. This makes them unsuitable for structures prone to water damage and located near the water table.
- These bricks have a high efflorescence rate and could fall victim to salt attacks when exposed to water and excess moisture.
- These bricks cannot be used to construct foundations and base slabs, where the negative pressure of water and capillary action could reduce the stability of the structure.
- These bricks have a high demand in areas with limited availability, which naturally increases the cost of the bricks.
When Porotherm Bricks May Not Be the Best Choice
Avoid or reconsider Porotherm bricks when:
- Local supply is unreliable.
- Workers have no experience with hollow clay blocks.
- Heavy wall-mounted fixtures are planned without proper anchoring.
- The project needs a very low initial material cost.
- The design is load-bearing but block strength is not verified.
- The contractor wants to use red-brick methods without adjustment.
- Proper cutting tools, mortar, and plastering methods are not available.
In such cases, red bricks, AAC blocks, concrete blocks, or another masonry option may be more practical.
Cost Factors of Porotherm Bricks
|
Cost Factor |
Impact on Project |
|
Block price |
May be higher than conventional bricks in some areas. |
|
Transport |
Increases if the site is far from the supplier. |
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Labour skill |
Trained labour can reduce breakage and rework. |
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Mortar use |
Larger blocks may reduce joint quantity. |
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Structural savings |
Lower dead load may help in overall design, where considered by engineers. |
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Plastering |
The correct plaster system affects final cost and finish. |
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Wastage |
Poor handling can increase breakage cost. |
Do not compare only per-piece price. Compare wall area cost, mortar, plaster, labour, breakage, transport, and long-term performance.
Fixing and Plastering Considerations
Porotherm walls need correct workmanship. Since the blocks are hollow, chasing, drilling, and anchoring must be done carefully. Heavy fixtures such as kitchen cabinets, geysers, TV units, shelves, and washbasins should use suitable fasteners or backing support as recommended by the supplier or engineer.
Plastering also matters. The wall surface should be cleaned, wetted if required, and plastered with the recommended mortar system. Poor plastering can create cracks, hollow sound, debonding, or uneven finish.
How to Check Genuine and Good Quality Porotherm Bricks
Use this checklist before buying:
- Check brand marking, batch number, and manufacturing date.
- Buy from authorised or reliable dealers.
- Ask for technical data sheets and test reports.
- Confirm block type, size, and use case.
- Check for cracks, broken edges, and excessive damage.
- Verify availability before finalising wall design.
- Confirm whether masons are trained in hollow clay block masonry.
- Check fixing and plastering recommendations.
Wienerberger states that genuine Porotherm bricks carry brand identification, manufacturing date, and batch number, and absence of these details may indicate the product is not original.
Practical Example
For a two-storey RCC framed house in a hot city, Porotherm bricks can be a good option for external and internal walls because they reduce wall weight and improve thermal comfort. If trained masons and reliable supply are available, the walling work can be efficient.
For a remote site where Porotherm blocks are not easily available and masons have only red-brick experience, they may not be the best choice. Higher transport cost, breakage, poor plastering, and fixing mistakes can reduce the expected benefit.
Conclusion
Are Porotherm bricks good or bad? They are good when the project needs lightweight walls, better thermal comfort, faster masonry, and clay-based hollow block construction. They can be a poor choice when availability is limited, workmanship is weak, or heavy fixtures and plastering are not planned properly. The right decision depends on wall type, budget, climate, structural design, supplier reliability, and labour skill. For best results, use genuine blocks, follow technical guidance, and confirm suitability with the project engineer.
FAQs
- Are Porotherm bricks good or bad for house construction?
Porotherm bricks are good for many house construction projects when used correctly. They are lightweight hollow clay blocks that can improve thermal comfort and reduce wall load, but they need proper handling, fixing, and plastering. - What are Porotherm bricks made of?
Porotherm bricks are made from clay and formed as hollow blocks. Their perforated structure reduces weight and helps improve insulation compared with many conventional solid walling materials. - Are Porotherm bricks better than red bricks?
Porotherm bricks can be better than red bricks for lightweight construction, faster walling, and thermal comfort. Red bricks may be better where cost, availability, labour familiarity, and simple fixing are more important. - Can Porotherm bricks be used for load-bearing walls?
Porotherm bricks can be used for load-bearing walls only when the specific block type, strength, wall design, and local approval support it. Do not assume every Porotherm block is suitable for load-bearing construction. - Do Porotherm bricks need plastering?
Porotherm brick walls usually need plastering or finishing unless the design specifies another approved finish. Proper plaster mix, surface preparation, curing, and workmanship are important to avoid cracks and poor bonding. - Are Porotherm bricks costly?
Porotherm bricks may cost more initially than local red bricks in some areas. However, the final cost should include transport, labour, mortar, plastering, breakage, wall speed, and possible structural or thermal benefits. - Can heavy items be fixed on Porotherm brick walls?
Yes, heavy items can be fixed on Porotherm brick walls, but they need suitable anchors, fixing methods, or backing support. Ordinary fasteners may not work well in hollow blocks for heavy cabinets or fixtures. - When should I avoid Porotherm bricks?
Avoid Porotherm bricks if genuine supply is difficult, labour is not trained, the wall needs unsupported heavy loads, or the contractor cannot follow hollow clay block masonry methods. In such cases, another walling material may be safer.
Sowjanya Siddanoor