The Wallbarn PVC Through-Wall Corner Roof Outlet is a high-quality, durable, and weather-resistant roof drainage outlet that's suitable for use with PVC and single-ply waterproofing membranes on flat roof systems. Manufactured from durable PVC, this versatile corner fitting provides a secure and reliable connection between flat roof drainage systems and rainwater outlets, helping to ensure effective water management in both new-build and refurbishment projects.
Specifically made for installation at the junction between horizontal roof decks and parapet walls or upstands, the outlet features a rectangular mouth and a flexible and smooth PVC flange that can be fully bonded to compatible PVC roofing membranes. The smooth, non-perforated flange creates a strong watertight seal, reducing the risk of water ingress and ensuring long-term performance in exposed roofing environments.
The soft, adaptable flange is easy to manipulate during installation and is slightly inclined towards the outlet shank to assist with sealing and drainage efficiency. Suitable for both vertical downpipe connections and horizontal through-wall drainage applications, the Wallbarn PVC Corner Outlet offers excellent flexibility for a wide range of flat roof drainage designs.
Applications: Flat roof drainage systems, parapet wall drainage outlets, through-wall roof drainage, single-ply roofing systems, PVC membrane roofing installations, commercial roofing projects, residential flat roofs, refurbishment and new-build developments.
This section is split into two parts, with advice about Wallbarn's pedestals range, as well as their green roof offering.
Pedestals
What are the advantages of pedestals?
They are quick and easy to install, offer improved drainage, protect the surface underneath and can be lifted at any time for maintenance.
How do I install them?
The pedestals are placed on a flat, hard surface, with no mechanical fixings required. They need to be placed on a structured surface, and shouldn't be placed on non-compacted earth.
Do they need to be fastened?
No, the pedestals are part of a suspended system, with the weight of the slabs/decking holding everything in place.
Green Roof
What is a green roof / modular roof?
Sedum or other succulent plants are grown in low-level substrates. Modular systems are grown in sections and can be lifted into place and joined together.
Do they need maintenance?
The plants are very hardy, but watering in extreme conditions is recommended. Dead leaves and vegetation should be removed at regular intervals, and a slow-release fertiliser can be applied at certain periods throughout the year.
What you need to know
Delivery charges
Delivery access
Wallbarn Parcels including pedestals and drainage outlets are packed into bags or boxes and delivered on a to-door service.
Wallbarn Pallets are delivered to kerbside only. Wallbarn cannot bring vehicles or pallet trucks onto gravel or earth surfaces, the customer will need to make arrangements to move the materials from the hard surface onto there property.
Wallbarn Double pallets including aluminium rails and decking materials are delivered on double length pallets and will be delivered to kerbside only.
Wallbarn Green Roof – M-Tray® and associated green roof products are delivered on pallets to kerbside only.
Date and time of delivery
Failed deliveries are chargeable
Damages & missing items
Do not install purchased items if you have a query with the product (e.g. if you need to query damage that occurred during transit).
If an item is installed it will not be refunded or replaced.
Delivery
How much does delivery cost?
Delivery charges will vary and will depend on the manufacturer, weight, size and delivery location. The cost is automatically calculated when you add items to the shopping basket.
How long will I wait for my delivery?
The estimated delivery times are shown on each product page, we will email you each step of the way to keep you informed. The majority of products can be delivered within 3-5 working days.We will advise you if the delivery period is different from than stated on our website.
Do you offer next day delivery?
If a product is available with next day delivery, this will be displayed on the product page or in the basket. If you have a particular item that you require quicker than the guide on our website, please contact our sales team on 01858 455055 during office hours, they will be able to confirm whether a quicker delivery is possible.
What if my delivery doesn't turn up on time?
Please contact our sales office on 01858 455055 or email sales@roofgiant.com and we will advise on the status of your order.
Do you offer free delivery if I spend a substantial amount?
Not as standard, we show the delivery charges separate once you go to the checkout so it is clear what you are paying for the products and delivery costs. If you are ordering larger quantities please contact out sales team who will be able to confirm if this is possible.
Do you deliver on weekends?
Not as standard, our deliveries are made Monday to Friday. If you do need an urgent Saturday delivery please contact out sales team on 01858 455055 during office hours who will be able to confirm. This will incur a premium charge if possible.
Do you deliver to Northern Ireland/Guernsey/The Scottish Highlands/Isle of Wight?
We cannot deliver any goods to Northern Ireland due to supplier restrictions.
Some suppliers/couriers will deliver to the other areas listed above, but not all - please contact our sales team for confirmation. If we are able to deliver the product you require, additional transport costs will apply. These additional costs are based on the manufacturer, distributor or courier providing the shipping on our behalf.
Do you deliver to Republic of Ireland, Europe and Rest of World?
No, we cannot deliver outside of Great Britain.
What if my delivery doesn't turn up on time?
Please contact our sales office on 01858 455055 or email sales@roofgiant.com and we will advise on the status of your order.
Returns Policy
Important: Please do not send goods back before speaking to our sales office.
📞 01858 455055 | ✉️ sales@roofgiant.com | 💬 Live chat
We recommend you take photos of the goods and packaging before returning, as this may be required for courier claims.
Your Right to Cancel
Returns After 14 Days
Refunds & Costs
Exclusions & Brand Policies
👉 For full details, including supplier-specific terms, please see our Returns & Refund Policy.
