“Why buy a Rs 30,000 AC?”: Man says his Rs 800 DIY roof trick cuts temperature by 15°C in 45°C heat

A video is gaining attention online in which a man shared a simple rooftop cooling method that he claims helped reduce indoor heat by 15 degrees at a cost of less than ₹800 during the extreme heatwave. This method has come as a relief as people are constantly searching for cost-effective ways to keep their homes cool without relying heavily on air conditioners.

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Instead of spending ₹20,000 to ₹30,000 on an air conditioner, the man used a mixture of Fixit URP, white chuna (lime powder), and Fevicol binder to coat his roof and reflect heat. The video has sparked interest among homeowners looking for budget-friendly summer cooling hacks.


He claimed that by using this simple cooling trick, the temperature can go down by 15 degrees Celsius even in 45 degrees heat. He further added that this process is based on science and is a simple, cost-effective method to beat the extreme heat.

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What Did the Man Use on the Roof?

The man explained that he prepared a cooling coat using three basic materials:

Fixit URP waterproofing solution

White chuna (lime powder)

Fevicol binder

According to him, the combination helps create a reflective layer on the roof, reducing heat absorption during extreme summer temperatures. He claimed the total expense for the process stayed below ₹800, making it far cheaper than buying or running an air conditioner.

How Was the Cooling Mixture Prepared?

In the video, the man demonstrated the full process step by step.

Step 1: Mixing the Materials

He first mixed white chuna with water to create a smooth liquid base. After that, he added Fixit URP and a small amount of Fevicol binder to improve sticking and durability.

Step 2: Preparing the Roof

Before applying the coating, he cleaned the rooftop surface properly to remove dust and dirt.

Step 3: Applying the Coat

Using a brush and roller, he spread the mixture evenly across the roof surface. He suggested applying more than one layer for better results.

Step 4: Letting It Dry

After coating the roof, the surface was left to dry completely under sunlight.

Why White Roof Coatings Help Reduce Heat

Experts often explain that lighter roof surfaces absorb less heat compared to dark concrete roofs. White coatings reflect a larger amount of sunlight, helping lower roof temperature and reducing indoor heat buildup.

This is why white reflective paints and lime-based coatings are commonly used in many hot regions during peak summer months.

“Why Spend ₹20,000–30,000 on AC?” Man’s Video Goes Viral

The man said people spend huge amounts on air conditioners and electricity bills every summer, while simple traditional cooling techniques can also provide relief at a much lower cost.

His statement — “Why spend ₹20,000–30,000 on ACs?” — caught attention online, especially among users looking for affordable alternatives during rising temperatures and high power bills.

Many social media users praised the idea for being:

Budget-friendly
Easy to apply
Useful during heatwaves
Energy-saving

However, some users also pointed out that the effectiveness can vary depending on roof type, weather conditions, and quality of materials used.

Low-Cost Cooling Hacks Becoming Popular During Heatwaves

With temperatures crossing dangerous levels in many Indian cities, several people are turning towards traditional and DIY cooling methods such as:

White roof coatings
Bamboo shades
Heat-reflective sheets
Water sprinkling systems
Natural ventilation techniques

These methods are becoming increasingly popular among households trying to reduce electricity consumption during summer.

Can DIY Roof Cooling Replace an Air Conditioner?

While low-cost roof cooling methods may help reduce indoor heat to some extent, they may not completely replace air conditioners during extreme heat conditions.

Still, such techniques can:

Lower roof temperature
Reduce heat entering rooms
Improve indoor comfort
Help cut electricity usage

For many households, especially in extremely hot areas, these affordable cooling hacks are being seen as a practical supplementary solution during summer.