- Building & Landscaping
- Building & Landscaping
- Civils & Drainage
- Cements & Aggregates
- Chemicals & Adhesives
- Site Tools
- Cleaning & Pest Control
- Bricks & Blocks
- Landscaping
- Roofing & Ventilation
- Lintels
- Builders Fixings
- Building Boards
- Damp Proofing & DPC
- Plumbing & Heating
- Plumbing & Heating
- Plumbing Fittings
- Plumbing Fittings
- View all Plumbing Fittings
- Waste & Soil Fittings
- Underground Fittings
- End Feed Fittings
- Solder Fittings
- Press Fit Fittings
- Pushfit Fittings
- Compression Fittings
- Plumbing Valves
- MDPE Fittings
- Waste, Traps & WC Connectors
- Gas Fittings
- Iron & Brass Fittings
- Flexible Connectors
- Pipe Clips & Collars
- Plumbers Washers
- Tap Accessories
- Cistern Spares
- Pipes & Tubes
- Heating
- Pipe Insulation
- Plumbing Tools
- Water Pumps
- Water Storage
- Ventilation
- Plumbers Consumables
- Loose Accessories
- Timber & Joinery
- Drylining & Insulation
- Decorating & Tiling
- Fixings & Ironmongery
- Fixings & Ironmongery
- Fixings
- Ironmongery
- Ironmongery
- View all Ironmongery
- Door Furniture
- Window Furniture
- Gate & Garage Fittings & Fixings
- Security
- Architectural Mouldings - Metal / Plastic
- Chains, Ropes & Accessories
- Draught Excluders
- Furniture Fittings & Fixings
- Drawer Runners
- Braces & Mending Plates
- Brackets
- Castors
- Curtain Fittings
- Floor Trims
- Hooks
- Tube Fittings
- Shelving Ironmongery
- Fire & Safety Hardware
- Tools & Workwear
- Tools & Workwear
- Power Tools
- Power Tool Accessories
- Hand Tools
- Hand Tools
- View all Hand Tools
- Building Tools
- Woodworking Tools
- Plumbing Hand Tools
- Electricians Hand Tools
- Levels & Measuring
- Handsaws & Cutting Tools
- Sockets & Spanners
- Screwdrivers & Hex Keys
- Pliers & Cutters
- Hammers & Demolition
- Files & Sharpening Tools
- Gardening Hand Tools
- Hand Tool Storage
- Workbenches & Trestles
- Other Hand Tools
- Work & Safety Wear
- Electrical & Lighting
- Electrical & Lighting
- Switches, Sockets & Boxes
- Heating & Ventilation
- Household Electricals
- Circuit Protection
- Cabling
- Lighting
- Electrical Accessories
- Electricians Tools
- Security Electricals
- Site Electricals
- Kitchens & Bathrooms
- Special Offers
- Clearance
- VAT: Inc Ex
Select postcode to see availability
Select branch to see stock
OSMA - Reliable PVCu Flat Roof Outlets for Professional Drainage
OSMA is a trusted name in roof drainage systems, known for its precision-engineered PVCu Domed Flat Roof Outlets that deliver performance and durability in all weather conditions. Designed to ensure effective rainwater drainage and prevent water pooling on flat or low-pitch roofs, OSMA outlets are easy to install, UV-resistant, and compatible with a wide range of roofing membranes and coverings. Whether you're managing a new build or retrofitting an existing structure, OSMA products are relied on by roofing professionals for their long-term dependability and exceptional engineering quality. Their products contribute to building longevity and protection through robust, high-capacity designs that require minimal maintenance.
Why Choose OSMA?
- UV and Weather Resistant: Built to withstand harsh outdoor conditions without cracking or fading, ensuring a longer operational life even in extreme environments.
- Optimised Flow Design: Domed grid ensures high-capacity drainage while preventing blockages caused by leaves and debris.
- Easy Integration: Compatible with common waterproofing systems, including felt, asphalt, GRP, and single-ply membranes, making it ideal for both new installations and refurbishments.
- Professional Grade: Trusted by roofing and construction contractors across the UK for their reliable performance on a wide variety of project types.
- Low Maintenance: Durable PVCu construction for long service life with minimal upkeep, helping reduce labour and repair costs over time.
Popular OSMA Products
- OSMA PVCu Domed Flat Roof Outlet - 82mm & 110mm: High-efficiency outlets ideal for commercial and residential applications, with strong flow rates and durable domed guards to keep debris out of drainage systems.
- OSMA Roof Drainage Accessories: Connectors, sleeves, and adaptors for seamless integration into roofing systems, ensuring leak-proof transitions and greater design flexibility.
FAQ
1. What are OSMA Domed Roof Outlets made from?
OSMA roof outlets are made from high-strength, UV-stabilised PVCu. This material ensures the outlets are resistant to weathering, corrosion, and impact, making them ideal for long-term external use. The PVCu construction helps maintain structural integrity over time and performs well under various climatic conditions.
2. Are OSMA outlets compatible with flat roofing membranes?
Yes, OSMA outlets are designed for compatibility with a wide range of waterproofing materials, including felt, asphalt, GRP, and single-ply membranes. Their integrated flange design allows for a secure bond with these surfaces, reducing the risk of leaks and making installation easier for contractors.
3. Do I need tools to install OSMA roof outlets?
Installation is straightforward. Basic tools and appropriate sealants are all that’s typically required. Most installations can be completed quickly by professionals, and detailed fitting guides are available to ensure proper sealing and placement. Always follow manufacturer instructions for best results.
4. Can OSMA outlets be used for retrofitting existing roofs?
Absolutely. OSMA outlets are often used in retrofit projects due to their versatile compatibility and ease of integration with existing roof structures and membranes. Their lightweight design and reliable sealing capability make them an ideal solution for upgrading drainage on older roofs.
Where to Buy
OSMA Roof Outlets and accessories are available at MP Moran both online and in-store. Visit our website to browse the full range or speak to our experienced team for guidance on selecting the right outlet for your roofing needs. We offer expert advice and fast delivery to help you complete your project efficiently and professionally.