Cool Roofs for the Rural Poor (12 min video)

As a part of the project, Cool Roofs for Rural Poor: Saving Energy, Beating the Heat Affordably-which was funded by the Innovation Challenge Program (fiscal 2014) of the World Bank, International Institute of Information Technology (IIIT), Hyderabad, and Visvesvaraya National Institute of Technology (VNIT), Nagpur-conducted experiments to assess the impact of cool roofs on two unconditioned school buildings in rural and peri-urban areas in India. This video presents the details of the experiment and its results.

[@vishnusoni1729]

स्कूलों,दफ्तरों और घरों के आसपास अधिक से अधिक वृक्षारोपण किया जाना चाहिए, भीषण गर्मी से बचाव का इससे आसान उपाय कोई नही.!

[@jmanishg]

Planting pot plants on roof tops give better results. It reduces heat as well as improves air quality, also encourages students to be with nature

[@sangramsinghrajvi]

But some of our academics personals and research personals drains lakhs of rupees of available fund in name of some basic research. Even after that if something was found they don't even want that normal people should know about it. Just call some of your friends and fellow team members, host a workshop explaining conducted research and some goverment funded lunch. That's it, it concludes whole research system with no real benefit to scientific or general population. Sorry to say but hugely disappointed.

[@Ab_someone]

Just make a sun shade an attic to block sun from directly hitting the roof

[@balakumar9]

@Johana Agredano hi spammer

[@Earth098]

This is absolutely amazing!!! Heat gain is one the biggest challenges in the buildings in tropics, this type of research and solutions are absolutely beneficial for the ordinary public, who cannot afford air conditioning. Keep up the good work!!

[@lucknowtahzeeb07]

kzbin.info/www/bejne/jnubm2mqbtp6rtU kzbin.info/www/bejne/b2Skqop9g9GaaNk Life of this acrylic based paint is 5 year as temperature difference is 15 to 20°C on roof.and inside temperature difference is 8 to 10°C. In 1 litre it will cover 30 sq.ft. It's a DIY product you can easily apply by own.Try this one quite effective than others. Referred by Rehan. Contact. [e-mail]

[@aimanalmasss]

soda lime stone, sea salt, white glue, white distumber, make it thick, apply with wiper. Then affix green fiber net on your roof, if you afford, also apply lime stone white wash on outer walls, and get more then 20 degree less temperature inside home. God bless you.

[@rakibbsl]

pls state the proportion of each material

[@harjeet464]

Yes, plz tell proportion

[@rakibshaharia5758]

the most obvious thing that is overlooked is the ventilator on the upper walls..ventilators are cost-effective and easy means to reduce heat but getting ignored in most construction in the last decade.

[@dhuskey886]

A Good and probed recipe for painting roof of walls with lime (CaO) is: Mix well and keep stirring while adding 4 Kg of powdered Lime in 10 Liters of clean water, heat will be released. Let the mix cool down for 1 or 2 hours. Thereafter, add to the mix 1 kg of White Cement plus 250 grams of Powdered Salt, Mix well all components until a homogeneous blend is available. On a dust free surface, apply 2 hands of this paint. To avoid cracks, the best time to paint in sunny places is early in the morning before the heat is on or late in the afternoon. Apply the first hand horizontally and let it dry, thereafter apply the second hand vertically (or the opposite) to ensure a good coverage. Note: Stir well before taking paint from the container. The rain won´t wash away this bright white paint.

[@monupatthipaka4123]

Thank you for sharing this information. Is powdered salt means cooking salt ?

[@shashirana9601]

Great info thanks

[@vaibhav3946]

plant more trees is the best solution for every one...

[@praveenfrancisjames5914]

One the roof ?

[@jays9918]

@@praveenfrancisjames5914 Yes, you can. Ever heard of rooftop gardening? It's quite popular in Kerala

[@praveenfrancisjames5914]

@@jays9918 o ho ,, ok

[@sijokxavier]

LoL 🤣 roof top gardening has no connection with bringing down roof temperature

[@toshirajput3404]

Great Work Great Idea Hats Off all teams 👍🙏🙏🙏

[@Berlintheking]

White Galvalume metal roofing costs less than Rs.90/sqft to install over a RCC. And a best method of reducing sun's radiant heat gain. Metal elevated roofing also increases the durability of the RCC Slab as no water falls in it and also provides a good shading. It also provides a lot of shaded place for other usages.

[@mltvlogsg9]

Berlin Raj I agree with you shed will also help to increase the life of building

[@kny9160]

Any person who does this work ?

[@nandubarge548]

It’s a common practice in North India since years long.Fooled World Bank and nothing to say for IIT. I am applying same theme for last 25 years in my construction practice.

[@shirishkulkarni832]

U r right sir

[@harjeet464]

Plz tell which coat is best, and how much different type of coat last

[@ombwallmagiccoat9681]

Hi

[@pranaygupta8917]

great video and experiment

[@mosessuthakar8731]

This video "Cool Roofs for the Rural Poor" has got a major flaw. It does not reveal what white material was used in the experiment, to coat on the roof, to reduce the room temperature.

[@jaiharris9824]

@@harshitaagrawal7190 ha ha..

[@vijayjain3471]

But its not working for Long time

[@SunilKumar-dy2yt]

It's lime..chunna

[@sangramsinghrajvi]

What is the composition of material and how to properly apply it? Simple question !! But some of our academics personals and research personals drains lakhs of rupees of available fund in name of some basic research. Even after that if something was found they don't even want that normal people should know about it. Just call some of your friends and fellow team members, host a workshop explaining conducted research and some goverment funded lunch. That's it, it concludes whole research system with no real benefit to scientific or general population. Sorry to say but hugely disappointed.

[@thilakj9353]

@@sangramsinghrajvi Ecxactly ur correct ,,,This is the real situation ,,No deal with people simple way,,,

[@johnhubert339]

Shade. Put a material on the roof such as old pallets on the roof and you have 100% radiance. Aluminum foil. You can cover a roof in aluminum foil for 5 cents a square foot, adhered with tar or paint. Then put irregulat shaped rocks on top to create shaded areas.

[@siddh3921]

🙌🙌🙌

[@jagadeeshsangam2499]

We have roof made up of soil and wood which transmits 100 solar radiation bcz always in summer it acts like AC room n in winter it will suffice warm room temperature.. I m proud of my ancestors made this house ❤️❤️

[@kumarchawla8309]

U not even mentioned the name of coat u used. 12 mins wasted.

[@jaiharris9824]

Yes bro your right..

[@JordanTheYoungRapper]

They aren't promoting any brand, its an experimental video

[@sanketkumar8040]

You can search this product keeping those three properties in mind

[@jyotirawta4530]

Abe tum chutiya ko Kya be bsdk

[@sangramsinghrajvi]

Same was my thoughts, some of our academics personals and research personals drains lakhs of rupees of available fund in name of some basic research. Even after that if something was found they don't even want that normal people should know about it. Just call some of your friends and fellow team members, host a workshop explaining conducted research and some goverment funded lunch. That's it, it concludes whole research system with no real benefit to scientific or general population. Sorry to say but hugely disappointed.

[@muskur1]

Why dont you visit Attapadi Hills in Kerala where the houses were being built for local poor, the roof is designed in such a way to keep interiors cool

[@sijokxavier]

Why don't you make a video or tell us what has been done? Why the suspense 🤣

[@sangramsinghrajvi]

What is the composition of material and how to properly apply it? Simple question !! But some of our academics personals and research personals drains lakhs of rupees of available fund in name of some basic research. Even after that if something was found they don't even want that normal people should know about it. Just call some of your friends and fellow team members, host a workshop explaining conducted research and some goverment funded lunch. That's it, it concludes whole research system with no real benefit to scientific or general population. Sorry to say but hugely disappointed.

[@saurabhkumarpathak2724]

Chuna or lime is a type of reflecting material .

[@saurabhkumarpathak2724]

But to fix lime on roof for long time . Use some adhesives like fevicol and it shall be applied in equal proportions. Apply one coating and leave for 24 hrs . Apply second coat and you are done

[@goutham4678]

I am planning to have this on my rcc roof, does this any effect the rain water harvesting? does it make the ground water more alkaline?

[@sangramsinghrajvi]

Good question, but it was not covered in scope of experiment. I think!!!!

[@koshallkamboj]

Yes....... it'll make ground water alkaline.

[@dineshdinu8060]

You should explain about the metirial..

[@devadeva-dl9fs]

they havent taken note of thermal conductivity of rcc slab like leaving a portion of slab nearer to the painted portion unpainted and doin the stats...it does need an explanation

[@anonymousarmadillo6589]

This is quite a useless video. They haven't released the collected data, haven't written a paper, nothing.

[@deekshithn8860]

Agreed heat would transfer from the unpainted roof to the painted one,

[@vishtrinity]

What paint r u using

[@muskur1]

The colonies were built by Attapadi Hills Development Society

[@kay-coat]

Should apply KAY-COAT HEAT REFLECTIVE PAINT, as it has proven track record of heat reduction and satisfied customers.

[@saifkader1]

Is it available in bangladesh

[@anilevarghese]

should have made a cost benefit comparison with a thatch roof on one portion, that way we could have a study over the years

[@monalipaul5383]

How much cost of cool roof paint

[@ravimukkavilli]

Thanks for the video. Can you share some best products that are available in the market now. My parents living in Vizianagaram, Andhra Pradesh, have been using this coolant to battle the summer months. But their experience is that, the white coating soon washes off after a good rainfall or blows off soon after the rain, and won't even last through the summer months (3-4 months). Is it the product they used or in general they are like that.

[@tahirhabib3816]

Ravi Mukkavilli k

[@MohanSingh-yg3ud]

Hey Ravi, Did you add some proportion of glue or say fevicol, around 10 kgs of lime to 1kg of glue. Mix and strain it well before application. And give your feedback to me.

[@DivergentDroid]

The 4.3 C reading is a difference of about 8 degrees F. So if the room was 90 now it's 82 F. Not too bad but I'd hate to see such a corrupt entity as The World Bank control and regulate this information.

[@ennakavi2129]

India is hundred times more corrupt

[@BubblesPothowari]

Black absorbs, white reflects. High school physics not technology !!

[@shashirana9601]

Exactly 😂

[@sangramsinghrajvi]

What is the composition of material and how to properly apply it? Simple question !! But some of our academics personals and research personals drains lakhs of rupees of available fund in name of some basic research. Even after that if something was found they don't even want that normal people should know about it. Just call some of your friends and fellow team members, host a workshop explaining conducted research and some goverment funded lunch. That's it, it concludes whole research system with no real benefit to scientific or general population. Sorry to say but hugely disappointed.

[@balakumar9]

They explained in layman terms

[@55justin11087]

What is the name called

[@jagadeshwark3470]

Does it decrease the life of rcc slab..

[@k.ganesanganesan6825]

bamboo helps. the hole inside bamboo resists heat Cold.

[@nileshyalkar1764]

I am using limewash for one room .It costs me 50 rs of lime.15 minutes to paint.

[@RajaNandepu]

how was the result ,, did it make room cooler

[@nileshyalkar1764]

Raja Nandepu yes.it has good effect.just the layer has to be thick.roof cleaned and washed before applying.another experiment I used flattened corrugated boxes tied together eith jute thread.I need only a fan till 3 pm when it is 40 degrees outside.I found that main heat sourse is ground ,tiles.so during night time a sindow ventilator fan throsing air inside is the best solution.

[@subramanyananjundaiah9131]

Nilesh Yalkar Hallo sir Our dining hall is so big How its use

[@nileshyalkar1764]

Subramanya Nanjundaiah .it will be difficult to use corrugated boxes.but thick limewash will be of great help.secondly try shading with green cloth wrt direction of the sun.I can send pics of what I have done.my whats app no. 9545797610

[@zazugee]

i put polysterene flats on the roof, no fixing, just a few slabs on top of each board and it reduced the tem of the ceiling from peak 40° to 29° heck, the ceiling used to be the hottest, now it's temperature is lower than the temp of the walls sometimes even as low as the temp of the floor. I intend to make a cooling roof with a cool pond design, so i won't need AC anymore

[@opticalmachinery]

i work in tin shed in summers it turns into an oven impossible to stay. giv suggestion please.

[@rogerd7646]

put hay on the top and soak it with water. Water evaporates and keeps the shed cool. You can grow plants on the tin roof.

[@nagms02]

kzbin.info/www/bejne/aYPKdpV3oLt5bcU

[@vinupdsouza8595]

Bangla AC

[@9DeepakSharma]

Was it just a white paint ?

[@loksapps5455]

Sir which cool material is used ?

[@srinivasanvaradharajan7876]

Everyone was talking ,more talking on theory.ok.but none said what kind of material they used and how for the benefit of the common folks. Is cem powder in market and lime is one and the same?

[@homeplan3532]

Vedic plaster cement cools the house and is also good for the environment

[@vnsyamala8757]

Have experienced it's working bro I'm planning to apply for my house

[@AnkitPal-et3xp]

You didn't tell What material to use.

[@MrMailsss]

It's a sheer disappointment, shall we call testing already available solution in the market as a research that too from such prestigious institution. Cool roof paints are available in the market for almost 8-9 years. And Iam very curious to know what new has come out from the workshop. A valid research would have been invention of a cool roof paint which gives significant cooling effect and durable (i.e., that can withstand rains)

[@rogerd7646]

They should have conducted the study with different materials to see how they compared to one another. Looks like they went into this research with the agenda to prove their point that white coating does reflect heat and keeps indoors cool. It was obvious from the beginning but looks like they want to impress upon policy makers and architects to adopt this method.

[@zazugee]

i dont think anyone need to demonstrate that cool roofs are cooler the issue is if they are worth the investement compared to other cooling methods like are they energy and cost effective? enduser rarely will think of changing their roof pain or tilling to solve overheating problems they tend to use active cooling methods instead of passive methods hence the point of such economic and energetic passive methods and studies because they demonstrate the benefit of using passive technics vs active and energy consuming ones

[@gagankalia3544]

Call for details 9871901858

[@shychand9062]

*Use Plastic* : Use 10-12 plastic sheet layers and paste it on roof. The best reflecting sunshine. Instead of dumbping plastic trash in garbage. Cheap and best. Hope do u like.

[@rajsinghtanda7272]

Make roof top gardens. Plant vegetables 🌶. & Herbs

[@remidsouza5212]

3-4% temp change is not too good output. What about winter and monsoon season temp conditions??

[@shreekanth9946]

Reduction in 1 degree temp is huge effect. Study about it madam

[@balakumar9]

There is no cost effective method to reduce more than this temperature range.

[@Durgeshkr00]

What do you mean to say rural poor. Those who apply chuna with fevicol mixture are not necessarily poor. Don't use rural poor because your construction work is done by those poor labour only.

[@zandrosampang1357]

What kind of paint you applied and where to buy one? Thanks

[@gagankalia3544]

Please call for Paint 9871901858

[@ajitt7939]

Need to cover all areas, roof to roof heat transfer need to consider.

[@sunilarora9228]

Where i get cool roof material in delhi

[@sabirali-jd7zn]

simply cover whole roof with a thick shiny white plastic it will give shade as well as cool your roof .because 90 % light will be reflected... more importantly after summer just take it out and keep safe for next summer .. so economical also ... further you can hang this plastic over walls also so walls of your house will not be heated in sunshine... sabir ali

[@gagankalia3544]

Hi Sunil, Did you try what Sabir suggested.If yes, pls let me know the result as I m facing the same issue

[@Aggarwal_shorts371]

Sir,how much is cost for a 230sqft room

[@nagms02]

Heat reflective paint on amazon costs around 7.5 k for 20 litre can. This can be enough for 500 Sq feet. Not sure if smaller cans are available for your purpose.

[@bikashlodh]

What is used to paint... Keeping reflection, emitence, ageing.. Please tell us

[@sangramsinghrajvi]

What is the composition of material and how to properly apply it? Simple question !! But some of our academics personals and research personals drains lakhs of rupees of available fund in name of some basic research. Even after that if something was found they don't even want that normal people should know about it. Just call some of your friends and fellow team members, host a workshop explaining conducted research and some goverment funded lunch. That's it, it concludes whole research system with no real benefit to scientific or general population. Sorry to say but hugely disappointed.

[@ombwallmagiccoat9681]

Roof guard wall magic coat Sintax Water tank Aur Garmi se Chootkara Jodhpur Rajasthan

[@piyushmeshram8256]

How to make biz nesh

[@anandraut6770]

Instead of this put rice husk It is with zero cost

[@dheeraj2947]

Are ud jaega

[@aimanalmasss]

if you want chilled air from your air cooler. put 5kg ice pieces, 250 grams sea salt and some water in air cooler tank, mix them well and on your Air Cooler, you can get chilled air from any ordinary room cooler for couple of hours. :)

[@koshallkamboj]

Ok

[@katik.samsivsiv1000]

sir in our balcony we applied oil paint in order to prevent from crack due to heat. but in summer our room temperature is higher and we can't live in room. give me suggestions for this problem

[@Berlintheking]

White Galvalume metal roofing costs less than Rs.90/sqft to install over a RCC. And a best method of reducing sun's radiant heat gain. Metal elevated roofing also increases the durability of the RCC Slab as no water falls in it and also provides a good shading. It also provides a lot of shaded place for other usages.

[@Ab_someone]

Just make a roof shade and let air pass in between... Why all this over engineering oversmart solutions. Make holes in the flat roof use a grill to.. Use the passive fans used in industrial facilities to Suck in the hot air.. Make a simple sun shade the reason why vernacular houses used an attic is to bloc the sun from directly scorching the top of roof

[@dcm_007]

Nothing like experiment or whatever..... it's a simple logic I have studied in class 9 that white color reflect almost all incident light i.e., minimum refraction or absorbtion of white light...and as results room temperature does not increase

[@balakumar9]

More than white colour its about reflectance....see properties of roof cooling paints in market.

[@dcm_007]

@@balakumar9 there is another thing that various cooling material are used... Just tell me why they are using only white color not other.. There are many color which looks beautiful than white... Dude... I just said it about... Why they choose only white

[@azi_talks4068]

Wher can i get cool roof im from kerala

[@NS-qc2eg]

-7:00

[@purethoughtts638]

Such is the standard of indian Engineers...Shame on the standard of the project...for a reputed college like...... This project can be a school project for SSC dtudents

[@balakumar9]

They explained in layman terms

[@WHYNKO]

6:53 but what about the impact to rain water mixing with the paint.. ? You will be releasing a lot of chemicals into the environment when it rains...??

[@rajanbutola8876]

Just 4 digree

[@anandhindu2804]

good idea.... but a building contains only 1-roof..... what about walls..... any ideas???

[@ravindrab100]

Heat penetrates from roof to walls to roof to walls to roof ...any no of floors.if the upper last floor is coveres ..it works wonders

[@akhtar971]

Video me music ka faltu shor Bhot Hy

[@curiousperson7740]

look at background for a minute, all computers are off in computer lab and student learning very carefully. this happens to most of students at school including me. i request to all perents for purchase a cheap 2nd hand desktop for your children. future will depend on this cheap machine.

[@abdulhadiqureshi2379]

Whats the innovation here, there are already many heat resistant paints available in the market. Also in the video they do not mention the painting material and method used. Why such respectable institutes were involved in such experiment which is already know to people.

[@sangramsinghrajvi]

That's called dummy researches.

[@balakumar9]

Non can spend on such paints so they are checking using low cost alternatives

[@rakeshwalmiki2106]

Sir 10× 25 ke roof ke liye kitna kharcha hoga mumbai me

[@lucknowtahzeeb07]

kzbin.info/www/bejne/jnubm2mqbtp6rtU kzbin.info/www/bejne/b2Skqop9g9GaaNk Life of this acrylic based paint is 5 year as temperature difference is 15 to 20°C on roof.and inside temperature difference is 8 to 10°C. In 1 litre it will cover 30 sq.ft. It's a DIY product you can easily apply by own.Try this one quite effective than others. Referred by Rehan. Contact. [e-mail]

[@dr.tusharkantidas7043]

Wasting of time

[@skr4938]

I give a big 👎 for it. Nature has made everything in such a meaningful and significant way that our earth absorbs the heat of sun shine. But in between earth and sun we constructed our homes. Hence there is no direct full absorption but a little. Now when we put the white paint on roof top, definitely it will cool the building but the reflection will heat the atmosphere. If all applies it, then imagine how drastically our atmosphere temperature will increase.

[@bhushaningle937]

If temperature rises upto 50 degrees 4-5 degrees less won't make any difference don't act like u have got any kind of breakthrough on cool roof 😠😠😠😠 n they say themselves as IITs are better

[@punnitji7399]

Sir, Do you have any better idea then please enlighten us. We'll be happy to hear you. So please sir I'm all ears🙏🙏

[@bhushaningle937]

@@punnitji7399 1:- rebuild the rooftop with insulating material. 2:- apply a thin layer(size in mm) of reflective or heat insulators material all over the rooftop with the help of adhesive so that the layer can be removed in winter's when the same region get's to a freezing temperatures.

[@ravindrab100]

Please explain how a part is cool and other part is hot...heat is a penetrating energy..transfer..the heat can go from uncoated to under the un coated area..of coverage is full it would be superb..hats off to the simple white cememt..limestone..fevicol and alum ...it just works wonders

[@ravindrab100]

It makes a difference...please

[@vnsyamala8757]

@@punnitji7399 kzbin.info/door/RVPMKE74rXnKdewLYRaS3w

[@shashirana9601]

Well what about mud house🤗 This video is and the innovation idea is total waste there is nothing new! We already studied in our school that darker material absorbs much heat and white material reflects heat! Where is innovation in that?

[@starkistuna]

mud houses (adobe) are generally 12-20 degrees cooler than outside air. I went inside on in Spain it was 40c outside and 32C inside and it wasnt even white it was dark brown.

[@shashirana9601]

@@starkistuna I know I had lived in a big mud house with my parents and relatives when i was child but now it's all gone! I miss all those days of my childhood

[@paragkulkarni187]

Nusti Badi Badi baate, aur vada paav khate. Wasted 12 mins.

[@manilalmani1428]

What is the use of this video, you are wasting public Mony& public time,

[@balakumar9]

Nothing has brought down India's development here.

[@sijokxavier]

Chunna lagaya

[@worldhowitisnow7319]

Cut salary of teachers and spend on infrastructure

[@ravindrab100]

If every student spends RS 10 it is done..for long time

[@balajee_csc_center9698]

not uses old ideas invent new ones to reduce 10-15 degree

[@FRANSCART]

weast of time

[@shaastra7866]

Its a scam!

[@jacksudheer408]

Use ancient Indian technology to reduce temperature but u guys did bull shit

[@alurrameshbhagawan2454]

Waste of time and money.

[@sabeensarfaraz7490]

Copying fake company worst