Roof heat proofing that measurably drops indoor temperature
A reflective, UV-stable top coat that turns back more than 85% of incoming solar radiation instead of letting the slab absorb it. Measured 6–8°C lower surface temperature on real Karachi roofs in June.
What actually happens when a roof gets heat-proofed
Roof heat proofing in Karachi is a separate system from waterproofing, even though most clients end up getting both — a reflective, UV-stable top coat that turns back more than 85% of incoming solar radiation instead of letting the slab absorb it, measured at 6–8°C lower surface temperature on real Karachi roofs in June, not a lab figure. It applies over R.C.C., G.I. and asbestos sheet roofs alike, either together with roof waterproofing in the same visit or afterward on a roof that's already sealed. The same reflective chemistry is sold by the pail as ZEM-30 Heat Shield for owners who want to apply it themselves. Send us the roof's covered area and a surveyor confirms which system fits before any quotation is written.
The problem
What an untreated roof costs you every summer
Top-floor rooms running visibly hotter than the rest of the house
AC compressors running longer through the day and failing sooner
The slab absorbing heat all day and releasing it well into the night
G.I. and asbestos sheet sheds turning into ovens by early afternoon
Energy bills climbing every June without the building itself changing
The treatment
What the reflective system does
Two coats of a UV-stable reflective top system over a sound or freshly waterproofed roof
Measured to turn back more than 85% of incoming solar radiation
Surface temperature recorded before and after, on the job sheet
Compatible with our RCC, G.I. and asbestos waterproofing systems — applied together or afterward
No colour fade for the stated warranty period
How the job runs
Four stages, in this order, every time
Skipping a stage is how a waterproofing job fails in year two. This sequence is not negotiable on our sites.
Survey
Rooftop temperature reading
We measure the existing surface temperature at midday before quoting, so the before/after comparison is real, not estimated.
Preparation
Cleaning and priming
Surface cleaned and primed so the reflective coat bonds properly, whatever the underlying material.
Application
Two reflective coats
Applied evenly across the full roof, each coat allowed to cure before the next.
Handover
Re-measured and logged
Surface temperature measured again in full sun and the drop recorded on the job sheet.
Questions we get asked
Roof heat proofing — the practical answers
Does heat-proofing replace waterproofing?
No — they solve different problems. Heat-proofing reflects solar radiation; waterproofing seals against rain. We usually recommend both together, but heat-proofing alone can go over an already-sound, dry roof.
How long does the reflective finish last?
The system is UV-stable and rated not to fade or lose reflectance for the stated warranty period, checked on our routine site visits.
Can it go over an existing coat?
In most cases yes, once we have checked the existing coat is sound and properly bonded. We confirm this on survey before quoting.
Does it work on G.I. and asbestos sheets, not just concrete?
Yes. The same reflective system applies over G.I. and asbestos sheet roofs and is often the single biggest comfort improvement for a warehouse or shed.
