Guides
Do heat reducing (Coolshield) sheets work
Tata Steel Colors publishes no solar reflectance figure and no SRI number against its own CoolShield roofing sheet. The only percentages on its site sit on a separate article about reflective roofing as a category, up to 70 to 80 percent of solar heat reflected and 15 to 30 percent off the first year's energy bill, with Durashine named among the technologies discussed but no figure pinned to it by name. What CoolShield's own product page states plainly is what it is built from: a Zinc-Aluminium coated steel top sheet, a 5 mm XLPE insulation layer, and an aluminium foil backing, at the same 0.37 to 0.62 mm thickness range as the rest of the Durashine roof line.
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Jay Shree Infra sells colour-coated roofing sheet across the counter in Saharsa and out into Supaul and Madhepura, in Tata Durashine, Jindal and Kamdhenu. CoolShield is a build inside that Tata Durashine line, not a separate brand, and what follows is what its own maker actually publishes about it, not a heat reduction percentage nobody has tested against the sheet itself. Not every size is in every brand on a given day.
CoolShield is built in three layers: an outer sheet of high strength steel with a Zinc-Aluminium coating, a 5 mm layer of XLPE insulation under it, and an aluminium foil that closes the underside to a smooth finish. The steel itself carries the same 0.37, 0.47, 0.52 and 0.62 mm painted thickness options as the rest of the Durashine roof line, so the insulation is what changes, not the steel it sits on.
The numbers
What Tata Steel Colors publishes, and where
Every thermal, acoustic and reflective claim on the maker's own domain for CoolShield, and whether a number sits beside it.
Scroll the table sideways to see every column
| Published where | What it says | Number given | What it is claimed for |
|---|---|---|---|
| CoolShield product page, Tata Steel Colors | Reduces heat penetration in summer, better thermal protection in winter | no number published | The CoolShield 3 layer sheet itself |
| CoolShield product page, Tata Steel Colors | XLPE insulation cuts rain vibration and outside sound | no number published | The CoolShield 3 layer sheet itself |
| CoolShield product page, Tata Steel Colors | Prevents moisture on the inside surface of the roof | no number published | The CoolShield 3 layer sheet itself |
| Cooling roof sheets article, Tata Steel Colors | Reflective roofing reflects solar heat | up to 70 to 80 percent | Reflective and insulated roofing as a category, Durashine named among them |
| Cooling roof sheets article, Tata Steel Colors | Switching to insulated or reflective roofing cuts energy bills | 15 to 30 percent in the first year | Reflective and insulated roofing as a category |
CoolShield's own product page and the cooling roof sheets article are two different pages on the same maker's site, and they say two different kinds of thing. The product page describes the sheet in front of you and carries no number at all. The article is about reflective and insulated roofing as a category, PUF panels, aluminium sheets, FRP sheets and Durashine named together in one paragraph, and the two percentages sit there, against the category rather than against any one tested sheet.
CoolShield's own product page is entirely without a number: no R-value, no U-value, no Solar Reflectance Index and no percentage sit anywhere on it. What sits there instead is what it is built from, in plain sentences, three times over: the steel, the insulation, the foil.
The two range figures that do exist on the maker's site sit on a different page altogether, written about cool roofing as a category rather than about one SKU. Read the 70 to 80 percent and the 15 to 30 percent as what that category claims for itself, not as a certificate for the sheet on your order.
The build
Three layers, and what each one does
The outer sheet is the same family of steel as the rest of the Durashine roof line, high strength steel with a Zinc-Aluminium coating. Under it sits a 5 mm layer of XLPE insulation, and under that an aluminium foil that closes the sandwich and gives the underside a smooth finish.
Tata Steel Colors' own sentence for what the three layers do together: it reduces heat penetration in summer and gives better thermal protection in winter, cuts down the sound and vibration rain makes on the roof, and stops moisture forming on the inside surface. No degree, no decibel and no percentage rides with any of those three claims.
The other page
Where the 70 to 80 percent and the 15 to 30 percent actually sit
A second article on the same maker's site, about cool roofing as a category rather than one product, states that reflective roofing can reflect up to 70 to 80 percent of solar heat, and that switching to an insulated or reflective roof can cut energy bills 15 to 30 percent in the first year. Both figures are given for the category as a whole, polyurethane sandwich panels, aluminium reflective sheets, FRP sheets and Tata Durashine all named together in the same paragraph.
Durashine's own mention in that article carries no number of its own, only that it has solar reflectivity and corrosion resistance built in. That gap between a category claim and a tested figure for one sheet is not somebody's guess to close, so the honest way to read those two numbers is as what reflective roofing claims for itself as a category, not as CoolShield's own rated performance.
The buyer's answer
Kya Coolshield lagane se sach me farak padta hai
What changes: a 5 mm insulated layer sits under the steel where a plain colour-coated sheet has none, and that layer is what the maker's own qualitative claims, summer heat, winter cold, rain noise, inside moisture, are attached to.
What does not change: the outer steel, its coating and its thickness options are the same Durashine range already on this rack, fixed the same way, ordered the same way, in the same lengths. Purlin and girt spacing under a Durashine roof is a separate published question again, with its own figures by thickness and span; ask for those on the same call.
At this counter
Where CoolShield sits on the Durashine rack
Jay Shree Infra keeps colour-coated roofing sheet in Tata Durashine, Jindal and Kamdhenu, at 0.35, 0.45 and 0.47 mm, 6 to 22 ft plus custom lengths. CoolShield is a build within the Tata Durashine line, so confirm on the call which exact build and thickness is standing before you order it. The full Tata Durashine range sits at the brand page.
If the choice in front of you is colour-coated sheet against a plain GC sheet, before insulation even comes into it, that comparison is the page for it. The full range is at Shed, Godown & Roofing.
Sources
The CoolShield page, and the article beside it
The maker's own product page for the sheet itself, and the one article on the same site carrying a number at all.
- DURASHINE CoolShield, product page, with the three layer construction, thickness options and the maker's own thermal, acoustic and moisture claimsTata Steel Colors (Tata BlueScope Steel)
- Cooling Roof Sheets: A Smart Way to Beat the Heat and Cut Costs in Industrial Units, with the 70 to 80 percent and 15 to 30 percent category figuresTata Steel Colors
Questions
Heat reducing chadra ke sawal
Kya Coolshield sheet garmi kam karta hai?
Tata Steel Colors' own CoolShield page says the sheet reduces heat penetration in summer and gives better thermal protection in winter, without a degree or percentage figure attached. A separate article on the same site claims reflective roofing broadly can reflect 70 to 80 percent of solar heat, but that number is given for the category, not tested and printed against CoolShield by name.
Coolshield me kitni layers hoti hain?
Three: an outer steel sheet with Zinc-Aluminium coating, a 5 mm XLPE insulation layer under it, and an aluminium foil closing the underside. The steel itself is the same 0.37 to 0.62 mm painted thickness range as the rest of the Durashine roof line.
Coolshield ka SRI ya reflectance number kya hai?
None is published against CoolShield by name. The maker's own product page for it carries no Solar Reflectance Index, no R-value and no percentage. The only percentages on the same site sit on a separate article about reflective roofing as a category.
Jindal ya Kamdhenu ki line me aisi insulated sheet hai kya?
Coolshield is stocked under Tata Durashine only. No published insulated build was found for Jindal or Kamdhenu's colour-coated lines, so a heat-reducing sheet here means the Tata Durashine build.
Insulated chadra ke neeche support ki duri badal jati hai kya?
Not something CoolShield's own page answers either way. Purlin and girt spacing is its own published question, with its own figures by sheet thickness and span, confirmed on the call against the roof in front of you.
Before you order
Settle the build before the phone call ends
Each one settles a different part of what the maker's own page leaves open.
Coolshield chahiye ya plain colour-coated sheet?
CoolShield is one insulated build inside the Tata Durashine line; the plain sheet is a different, uninsulated build at the same steel thickness.
Kaun sa painted thickness, 0.37, 0.47, 0.52 ya 0.62 mm?
That is the published range for the steel sheet itself, before the insulation layer is counted.
Sheet ki length kitni chahiye?
Confirm the exact length and today's stock on the call; not every build is standing in every length on a given day.
Kis roof par lagni hai, aur purlin spacing bhi confirm karni hai?
Purlin and girt spacing is a separate published question. Ask it on the same call if the shed's drawing is not settled yet.
Garmi kam karne ka koi number chahiye ya sheet hi chahiye?
No published number sits against CoolShield by name. A certified figure for a tender is a question for the maker directly, not something a phone call here can supply.
Contact
Confirm the build, then the thickness
No percentage or SRI number travels with the CoolShield name. Tell us on +91 6202 967 218 whether you want the insulated build or the plain sheet, and in which thickness, and we confirm what is standing on the rack today.
Shop hours: All 7 days, 9:30 AM to 6:00 PM