§ Damac Lagoons · Villa roof waterproofing

Damac Lagoons.

Damac Lagoons villas have the industry-standard combo roof system. We survey and waterproof villas across Santorini, Costa Brava, Malta, Nice, Morocco and Venice.

Roof type · Combo roof Fix · 7-layer overlay · no demolition
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§ 01 · What’s on your roof right now
The combo roof system in cross-section: solar-reflective topcoat, protective screed with expansion joint sealant and backer rod, separation layer, bitumen coating, sprayed polyurethane foam heat insulation, and concrete slab

The combo roof system

If your villa is in Damac Lagoons, this is your roof. From the top down: a solar-reflective topcoat, a protective cement screed cut with expansion joints (sealant over a backer rod), a separation layer, a bitumen coating, sprayed polyurethane foam heat insulation, and the concrete slab.

The waterproofing layer is the bitumen coating — layer 2, under the screed. The layers above it are not waterproof. The system works as long as the screed and its joint sealant stay intact; when they age, water can reach the bitumen coat, and sometimes this causes leaks.

Because the bitumen coat sits under the screed, it can’t be inspected or repaired directly — which is why combo roof repairs are usually about managing the layers above it, or covering the whole build-up with a new membrane.

§ 02 · Where combo roofs can leak

Three places water can get in

01 · EXPANSION JOINTS

Joint sealant ages.

The screed expands and contracts with daily temperature swings. Over time the joint sealant hardens under UV and can pull away from the joint edges. An open joint lets rainwater through to the layers below.

02 · SCREED CRACKS

Cement screed can crack.

Hairline cracks are a normal part of how a cement screed cures and ages. They are structurally harmless, but they can let water through to the layers underneath.

03 · THE BITUMEN COAT

The waterproofing is buried.

The bitumen coating is the only waterproof layer, and it sits under the screed where it can’t be inspected or repaired. If water reaches a lap or pinhole in it, the leak can travel through the foam insulation before showing on a ceiling — often far from the entry point.

§ 03 · The RainSafe fix

The RainSafe overlay: a new membrane over the top

We don’t demolish anything. We clean and prepare the existing surface, repair the open joints and cracks, then install our seven-layer pure polyurethane membrane over the top of the whole build-up — primer, reinforced base coats, fleece, and a high-SRI aliphatic cool-roof finish.

The result is a seamless waterproof skin on the outside of your roof, so no water enters the build-up at all — not the joints, not the cracks, not the old bitumen coat. The combo roof underneath stays exactly as it is, permanently dry.

§ 04 · Damac Lagoons specifically

Why owners here install it early

Many Lagoons owners add the overlay while the villa is still new, for two practical reasons: the SRI 100+ cool-roof finish starts reducing upper-floor heat and AC load from day one, and installing on a clean, dry roof is the simplest version of the job. Many combine it with landscaping and pool works while the villa is already in works mode.

Also serving: Dubai Hills Damac Hills Tilal Al Ghaf
§ 05 · Questions from Damac Lagoons owners
How much does the RainSafe system cost for a villa in Damac Lagoons?
The seven-layer system is AED 210 per square metre — the same specification everywhere we install it. Roofs in Damac Lagoons generally run 100–350 m² depending on the villa type, so projects typically land between about AED 21,000 and 73,500. A free site survey gives you an exact written quote. See the full cost breakdown at the cost guide.
Do you remove the existing combo roof first?
No — nothing is demolished. We clean and prepare the existing surface, repair open joints and cracks so the substrate is sound, then apply the seven-layer membrane over the top. A typical villa takes about a week on site, and you can live in the house throughout.
The villa is still under the developer’s warranty. Doesn’t that cover the roof?
Developer warranties cover defects, and they’re time-limited. The combo roof’s joints opening in year three to five isn’t a defect — it’s the design ageing normally, and it usually shows up after the warranty conversation is over. Our overlay carries its own 10-year written warranty, on top of a 25-year design life.
Does the overlay affect the developer’s structure in any way?
No. Nothing is removed and nothing is drilled. The membrane is applied over the prepared surface of the existing build-up — it adds a waterproof skin and reflective finish, and it adds almost no weight.

Free roof survey,
Damac Lagoons.

A senior technician walks your roof, checks the joints, screed and drains, and gives you a written condition report with an exact quote. Yours to keep, no obligation.

Book the survey→ WhatsApp · fastest reply→
§ Keep reading · The RainSafe Journal
№ 01 · Field Note · Failure Modes

Why most UAE villa roofs fail in year three.

Read · 12 min → № 03 · System · Anatomy

Seven layers, in plain English.

Read · 9 min → Field Note · Cool Roof

What a cool roof is, in plain English.

Read · 6 min →