Buy Roof Outlets & Flat Roof Drainage Solutions
If you’re looking to buy Roof Outlets in Ireland, this collection
provides high-performance drainage solutions designed to efficiently remove
rainwater from flat and low-pitched roofs.
We supply integrated drainage systems from Harmer Building Drainage,
offering durable aluminium and cast iron roof outlets suitable for a wide range
of roof constructions and waterproofing build-ups.
Designed to prevent ponding and reduce structural water load.
Compatible with flat, warm roof, inverted, and built-up systems.
Designed to coordinate with internal rainwater systems.
![Harmer ADP Threaded Spigot Adaptor - 400mm Long Buildstore]()
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![Harmer AV400T Aluminium Dome Grate Flat Roof Outlet with Vertical 4"BSPT Thread (Adapter required. See 4ADP) Buildstore]()
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![Harmer AV200T Aluminium Dome Grate Flat Roof Outlet with Vertical 2" BSPT Thread (Adapter required. See 2ADP) Buildstore]()
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![Harmer AV300T Aluminium Dome Grate Flat Roof Outlet with Vertical 3"BSPT Thread (Adapter required. See 3ADP) Buildstore]()
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Quick view Harmer AV600 Aluminium Dome Grate Flat Roof Outlet with Vertical 150mm (6") Spigot€187.50 (ex VAT)€225.00 /
Quick view Harmer AV400 Aluminium Dome Grate Flat Roof Outlet with Vertical 100mm (4") Spigot€172.69 (ex VAT)€207.23 /
Quick view Harmer AV300 Aluminium Dome Grate Flat Roof Outlet with Vertical 75mm (3") Spigot€167.71 (ex VAT)€201.25 /
Quick view Harmer AV200 Aluminium Dome Grate Flat Roof Outlet with Vertical 50mm (2") Spigot€141.17 (ex VAT)€169.40 /
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Flat and low-slope roofs require carefully specified drainage to prevent standing water, membrane damage, and structural stress. Roof outlets act as the primary discharge point, directing rainwater safely into internal pipework or external drainage systems.
Choosing the correct outlet ensures compatibility with insulation depth, waterproof membrane type, and roof build-up. Whether for new construction or refurbishment projects, selecting the right roof drainage outlets supplier reduces long-term maintenance risks and supports structural performance.
Roof outlets are widely specified across commercial buildings, apartmentcomplexes, schools, retail units, and residential extensions.In larger commercial applications, high-capacity outlets help manageincreased rainfall intensity, particularly where roof spans are significant. Inresidential settings, properly installed outlets prevent water pooling that canshorten roof lifespan.The available range supports both gravity drainage and internalrainwater pipe systems.
Material selection plays a key role in performance and durability.
Aluminium roof outlets provide corrosion resistance and lightweight installation advantages, making them suitable for modern construction methods.
Cast iron outlets offer superior strength and longevity, particularly where structural rigidity and impact resistance are required. Both options are designed to integrate with compatible rainwater systems for coordinated drainage performance.
Roof outlets form part of a wider drainage network that may include internal rainwater pipes, channels, and floor drains. Using coordinated systems from a single manufacturer improves compatibility, simplifies specification, and ensures reliable joint performance. This integrated approach supports designers and contractors in achieving long-term drainage reliability.
Why Choose Our Roof Drainage Outlets Supplier?
As a trusted Harmer Flat Roof Outlets supplier, we provide high-quality drainage systems supported by reliable sourcing and knowledgeable service. Our goal is to help contractors and specifiers secure compliant, high-performance roof drainage solutions.
Trusted Drainage Manufacturers
Products sourced from recognised building drainage specialists.
Technical Product Support
Guidance on compatibility with roof membranes and build-ups.
Commercial & Residential Supply
Suitable for projects of varying scale and complexity.
Nationwide Delivery
Secure shipping directly to site or business locations.
Frequently Asked Questions
You can buy online through our collection, with nationwide Irish delivery availablefor commercial, residential, and refurbishment roofing projects.
These outlets are suitable for flat,low-slope, warm roof, inverted roof, and built-up roofing systems acrossvarious construction types.
Yes, the range includes both aluminium andcast iron roof outlets, allowing specification based on durability, weight, andstructural requirements.
Roof outlets prevent standing wateraccumulation, reducing structural load, membrane deterioration, and long-termmaintenance issues on flat roof systems.
Yes, they are widely specified for commercial projects, including offices, schools, retail units, and multi-occupancyresidential developments.
Yes, roof outlets are designed to integrate
with internal rainwater pipe systems for controlled and efficient drainage.
Selection depends on roof build-up depth,waterproof membrane type, outlet diameter, and anticipated rainfall capacityrequirements.
Yes, we supply coordinated roof drainagecomponents including outlets, channels, and compatible internal drainagesystems.
