Sound waterproofing taking the heat
CovaTherm reflective coating
The coating cools and protects the waterproofing for a small spend.
FLAT ROOF COATING
Reflective Flat Roof Coating for commercial flat roofs
Cool your flat roof by 8 to 10°C and lock down its waterproofing — no full re-roof needed.
-8 to -10°C
under the roof
Waterproofing
+ cooling in one pass
€20-25/m²
versus €80-150/m²
Applied by your own professional crew
Works on waterproofed flat roofs
Liquid-applied reflective waterproofing
No downtime
Why act
Flat, your roof takes the sun all day.
Maximum exposure
A flat roof takes the full force of the sun from morning to night. It is the hottest surface on the building.
Waterproofing under strain
Heat, UV and standing water wear down a flat roof's waterproofing. The detail points are the first to give.
Comfort slipping
Under a roof that runs hot, the top floors get hard to live in come summer, and the AC runs flat out.
One solution can cool the roof and shore up its waterproofing.
The Covalba solution
Your flat roof reflects the sun and stays watertight.
On a flat roof, CovaSeal 20 is a liquid-applied reflective waterproofing: it reinforces the existing seal while bouncing the sun back. If the substrate is already fully watertight, the CovaTherm system is enough to cool it.
The system
- Check the waterproofing and the detail points
- CovaSeal 20 or CovaTherm, depending on condition
- Careful work on upstands, drains and joints
What you gain
Cool on top, watertight underneath.
8 to 10°C cooler under the roof, from the first summer.
Cooler upper floors
The roof stops radiating its heat downward, so the spaces below are comfortable again.
Reinforced waterproofing
CovaSeal 20 strengthens the existing seal and locks down the weak spots.
Re-roofing pushed back
You put off a heavy, costly re-roof by several years.
A lighter bill
On air-conditioned buildings, cooling demand drops.
The right call
Lock down the roof before the heavy re-roof.
As long as the structure holds up, a liquid-applied reflective coating reinforces and cools without redoing the whole roof.
| Covalba reflective coating | New white membrane | Insulation + waterproofing replacement | |
|---|---|---|---|
| Investment | ~112,500 EUR (22.5 EUR/m2) | ~450,000 EUR (90 EUR/m2) | ~750,000 EUR (150 EUR/m2) |
| Life | 8-10 years | 15-20 years | 20+ years |
| Deferred investment | reference | up to +337,500 EUR | up to +637,500 EUR |
| Activity during the work | maintained | interrupted | interrupted |
Investment
Covalba reflective coating~112,500 EUR (22.5 EUR/m2)
New white membrane~450,000 EUR (90 EUR/m2)
Insulation + waterproofing replacement~750,000 EUR (150 EUR/m2)
Life
Covalba reflective coating8-10 years
New white membrane15-20 years
Insulation + waterproofing replacement20+ years
Deferred investment
Covalba reflective coatingreference
New white membraneup to +337,500 EUR
Insulation + waterproofing replacementup to +637,500 EUR
Activity during the work
Covalba reflective coatingmaintained
New white membraneinterrupted
Insulation + waterproofing replacementinterrupted
You get summer comfort now and push a far heavier job down the road.
Aging waterproofing, no leaks
CovaSeal 20
Reinforces the seal and cools for about a quarter of what re-roofing costs.
Active leaks
Fix the detail points, then CovaSeal 20 — or re-roof if it is too far gone
We seal the leak first; the coating never goes over an active leak.
Not enough insulation
A reflective coating for summer, weighed against a full re-roof if insulation is the issue
A reflective coating handles summer heat, not insulation.
Cool your flat roof while locking down the waterproofing.
A site visit walks the upstands, drains and ponding areas, so you can choose between CovaSeal 20, CovaTherm or a heavier repair.
What we work on
A fit for most waterproofed flat roofs.
The system goes on flat roofs with an asphalt membrane, a synthetic membrane or a waterproofed concrete substrate. It starts with a look at the waterproofing, the upstands, the drains and the ponding areas.
01
Étape 01
Technical check
Waterproofing condition, detail points, ponding, thermal targets.
02
Étape 02
Prep
Clean and repair the weak spots.
03
Étape 03
Safe application
CovaSeal 20 or CovaTherm, sprayed from outside the building.
04
Étape 04
Inspection
Quality check and monitoring over time.
Machinery stays at the foot of the building, nothing on the roof. No risk to the structure or the waterproofing when a trained, equipped crew does the work.
Real results
Measured in the field.
-7.5°C
on surface temperature
Reinforced waterproofing
on the coated areas
+8 to 10 years
of waterproofing kept
FAQ
Your questions, our answers.
Take the heat out without redoing the whole roof.
CovaSeal 20 reinforces the existing waterproofing and drops the heat under the roof, applied from outside with no downtime.
Site visit within 48hWaterproofing and coolingNo obligation
Tout comprendre sur le sujet.
The flat roof is the most sun-exposed setup there is. It bundles two problems: the building runs hot, and the waterproofing has to last.
Why a flat roof runs hot
A flat roof faces the sun head-on for most of the day. The surface, often dark, can pass 80°C in summer, and that heat drops straight to the floors below.
How a reflective coating works on a flat roof
A reflective coating bounces radiation back instead of soaking it up. On a flat roof, CovaSeal 20 is often the pick: it reinforces the waterproofing and cools in one pass.
Reflective flat roof coating or new waterproofing
New waterproofing runs €80 to €100/m², and up to €150/m² with insulation. A reflective coating comes in around €20 to €25/m².
When to choose liquid-applied reflective waterproofing
Waterproofing still in place but worn, with no reported leak, is the sweet spot for CovaSeal 20.
Where a reflective coating works best
On a flat roof — the most exposed surface on the building — a reflective coating is at the top of its game.
Protection that lasts
The CovaSeal 20 and CovaTherm systems are built to last 8 to 10 years.
Sources et références
- Lawrence Berkeley National Laboratory, Heat Island Group, Reflective Roofs https://heatisland.lbl.gov/coolscience/cool-roofs
- U.S. Environmental Protection Agency, Using Reflective Roofs to Reduce Heat Islands https://www.epa.gov/heatislands/using-cool-roofs-reduce-heat-islands
- EPA, Reducing Urban Heat Islands: Compendium of Strategies, Reflective Roofs https://www.epa.gov/sites/default/files/2014-06/documents/coolroofscompendium.pdf
- U.S. EPA, Heat Island Effect: reflective roofs https://www.epa.gov/heatislands