Roof Drains & Rainwater Outlets
Alphatek supplies roof drains and rainwater outlets for flat roofs, terraces and podiums across Dubai, the UAE and the GCC – dome, flat and flap types with cast iron bodies and aluminium, cast iron or stainless steel tops, in common outlet sizes such as 3″ and 4″.
Cast iron body with a raised aluminium or stainless steel dome that keeps leaves and debris out of the outlet.
Cast iron body with a flat cast iron grate that sits flush with terraces and walkable roofs.
Stainless steel outlet flaps and wall outlets to finish downpipes neatly and keep pests out.
What we supply
| Product | Typical use |
|---|---|
| Dome roof drains | Cast iron body with aluminium or stainless steel dome, 3" and 4" outlets, for flat concrete and membrane roofs |
| Flat roof drains | Cast iron body with flat cast iron grate for terraces, podiums and roofs with foot traffic |
| Rainwater outlet flaps | Stainless steel hinged flaps for downpipe and wall outlets – stop pests and backflow |
| Bronze downspouts | Nickel bronze downspout outlets for a neat, durable finish at the base of facades |
| Scupper and parapet drains | Side-outlet drains for parapet walls |
Dome, flat or flap?
Where it's used
Frequently asked questions
Which roof drain should I use on a flat concrete roof?
What outlet sizes do you supply?
Do you supply rainwater outlet flaps?
Can you match an existing drain or a consultant specification?
Do you deliver outside Dubai?
Related: Scupper & Parapet Drains · Planter & Balcony Drains · Floor Drains · Drainage Accessories · Dome Roof Drain · Flat Roof Drain · Scupper Roof Drain · Rainwater Shoes · Drainage Vent Caps & Cowls · Roof Access Hatches
How to choose a roof drain for a UAE project
The right roof drain depends on the roof build-up, whether people walk on the roof, and how the outlet connects to the drainage pipe below. These are the points we check with contractors and MEP consultants before we quote.
1. Roof type and waterproofing
Most roofs in Dubai and the UAE are concrete slabs with a bituminous, PVC, TPO or liquid-applied membrane. The drain needs a flange and clamping ring that grips the membrane, so water cannot track under the waterproofing at the outlet. On inverted roofs, green roofs and podiums with screed, tiles or pavers, choose a drain with an adjustable extension so the grate finishes level with the top surface.
2. Foot traffic and finish
- Non-walkable roofs: a dome roof drain keeps sand, leaves and debris out of the outlet and still drains if debris builds up around it.
- Terraces, podiums and roof gardens: a flat roof drain sits flush with the floor finish so people can walk over it safely.
- Public and hotel terraces: choose a heel-safe or stainless steel grate for a finished look.
3. Outlet size, number of drains and overflows
Outlet size and the number of drains depend on roof area, design rainfall and pipe size, and are set by the MEP drainage design. Common outlet sizes are 3″ (75–80 mm) and 4″ (100–110 mm). Good practice is to give every roof area at least two outlets, or one outlet plus an overflow scupper, so a single blocked drain does not flood the roof. Choose a vertical outlet where there is ceiling space below, or a side (90°) outlet where the pipe must run horizontally.
4. Materials
| Material | Best for |
|---|---|
| Cast iron body | Standard choice for concrete roofs – strong, durable, non-combustible and quiet in use |
| Aluminium dome | Lightweight, corrosion-resistant debris guard for non-walkable roofs |
| Stainless steel 304 / 316 | Coastal sites, architectural terraces and areas where a polished finish is wanted – 316 for sea-front projects |
| Cast iron flat grate | Terraces and podiums with foot traffic |
Approvals and submittals
We supply roof drains and rainwater outlets from established brands, including Zurn, which have been submitted and approved on projects in the UAE. For each enquiry we can provide technical data sheets, drawings, material submittals and manufacturer test information for consultant approval.
Installation and maintenance in UAE conditions
- Set the drain body at the lowest point of the roof falls and fix it to the slab before waterproofing.
- Bond or clamp the membrane into the drain flange – this joint is where most roof leaks start.
- Keep domes and grates in place; sand and dust storms quickly block an open outlet.
- Inspect and clean roof drains after sandstorms and before the winter rains, as many roof leaks in the UAE come from blocked outlets.
More roof drain questions
What is the difference between a roof drain and a scupper?
A roof drain sits in the roof slab and discharges into a vertical pipe. A scupper passes through the parapet wall and is often used as an overflow or where there is no space for internal pipes. See our scupper and parapet drains.
Can roof drains be used on balconies and planters?
Yes, but smaller balcony drains and planter drains with a mesh dome are usually a better fit – see planter and balcony drains.
What should I send for a quote?
The roof build-up (membrane type), outlet size, vertical or side outlet, dome or flat grate, quantity and project location. Email sales@alphatek.ae, call +971 54 466 7243 or use our request a quote form.
Why Choose Alphatek?
- Superior 304 & 316 grade stainless steel
- Custom design & fabrication
- Precision engineering & craftsmanship
- Long-lasting corrosion resistance
- Competitive pricing & timely delivery
Related roof drainage
Cast iron roof drains, scuppers and cleanouts · scupper and parapet drains
High Quality Construction Materials Provider in the UAE
Alphatek – Delivering drainage solutions that keep your projects flowing.