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Birds Beak Joint Profiles

Aluminium birds beak joint profiles that fix behind the open joints of rainscreen facade panels. The angled centre ridge works as a rain baffle, pushing wind-driven water away from the cavity while keeping ventilation and drainage paths clear.

Unlike sealant-based joint details, a birds beak profile leaves the joint open so airflow isn’t restricted and moisture doesn’t get trapped. Water that hits the profile gets deflected outward instead of passing through to the subframe and insulation behind.

Every profile in this range is aluminium with a black finish, staying hidden behind the joint gap on the finished facade. Available in 47mm and 65mm widths, in 2.5m or 3m lengths. 

Sold in packs of 10. Available with worldwide delivery.

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  • A picture depicting the birds beak joint profile design when used with a cladding panel

    Aluminium Birds Beak Joint Profile - 65mm x 3m

    £12.18
    £12.18
    Product Overview: The Birds Beak joint profile is an aluminium cladding profile that sits behind the open joint between rainscreen facade panels. Its shape works as a rain baffle — angling wind-driven water away from the cavity behind the panels, while still letting air...
    £12.18
    £12.18
  • A picture depicting the birds beak joint profile design when used with a cladding panel

    Aluminium Birds Beak Joint Profile - 47mm x 3m

    £12.18
    £12.18
    Product Overview: This is the narrower option in the Birds Beak range, built for tighter joint details or smaller panel formats where a 65mm profile would be overkill. Like the rest of the range, it sits behind the gap between panels and acts as...
    £12.18
    £12.18
  • A picture depicting the birds beak joint profile design when used with a cladding panel

    Aluminium Birds Beak Joint Profile - 65mm x 2.5m

    £13.69
    £13.69
    Product Overview: Same 65mm Birds Beak profile as its 3m counterpart, just in a shorter 2.5m length. This one makes sense where your panel heights don't need a full 3m run, or where shorter lengths are easier to transport and handle on site. The...
    £13.69
    £13.69

What Is a Birds Beak Joint Profile?

A birds beak joint profile (also called a birds beak cladding profile or rain baffle profile) is an aluminium extrusion with a raised centre ridge shaped like a bird’s beak. Fixed vertically behind the gap between two cladding panels, that angled peak kicks rainwater outward and away from the building’s cavity instead of letting it run straight through the joint.

Open joints exist by design on rainscreen facades. They let air move behind the panels, working with ventilation profiles at the base and head of the facade to keep the cavity dry. The birds beak profile adds a layer of rain defence to those joints without closing them off or blocking drainage.

When Should You Use a Birds Beak Profile?

Anywhere there’s an open vertical joint between facade panels on a ventilated rainscreen system. You’ll see them on projects using fibre cement panels from EQUITONE and James Hardie, HPL panels like Trespa, mineral boards from Rockpanel, plus ceramic, natural stone, and composite aluminium cladding. If the joints are open rather than sealed, this is the profile that goes behind them.

Typical projects include commercial offices, residential blocks, schools, hospitals, and mixed-use developments. They’re also common on refurbishment and overcladding jobs where an existing building is being re-skinned with a new rainscreen system.

If the spec calls for an open-joint detail with a rain baffle behind the panels, this is the product.

Choosing the Right Size

Three sizes in the range:

65mm x 3m: The go-to size. 65mm width covers standard open-joint setups on most rainscreen systems. The 3m length means fewer butt joints on a vertical run, so it suits most commercial and residential facades.

47mm x 3m: Narrower option for tighter joint details or smaller panel formats where 65mm is too wide. Same 3m length.

65mm x 2.5m: Same 65mm width, shorter length. Pick this where your panel heights don’t need a full 3m run, or where shorter lengths are easier to get to site.

All three are aluminium, finished in black, and can be cut down on site with standard tools.

Why Aluminium?

Light enough to handle easily at height. Won’t corrode behind the facade, even on coastal jobs or buildings with high moisture exposure. Cuts to length on site without specialist tooling. There’s a reason it’s the go-to material for cladding profiles across the industry.

The black finish is there so the profile disappears behind the joint gap. Looking at the facade face-on, you see the shadow line of the joint, not the profile behind it.

Installation

Fix directly to the vertical rails or subframe, centred behind the gap between adjacent panels. Most installers secure them with colour-matched rivets or facade screws, though the fixing method will depend on your subframe type.

The profile sits behind the panels, so it doesn’t need to look perfect from the front. What matters is that it’s consistently positioned behind every joint so water can’t bypass it.

Butt profiles end-to-end for runs longer than a single length. Cut to size on site as needed. If you’ve got specific fixing requirements for your subframe, speak to our team and we’ll advise.

Other Products You’ll Need

A birds beak profile is one part of the installation. Mainline Products stocks the rest: facade profiles and ventilation trims, colour-matched fixings, EPDM gaskets, drill bits, and installation tooling. All shipped worldwide.

Every rivet and screw we supply can be painted to match your panel colour through our colour-matching service, with a 25-year coating warranty. Want to see the finish before you commit? Order a free sample pack and we’ll send painted samples to your door.

Need help pulling together the right products for your project? Get in touch — call +44 (0) 1782 629 270 or email sales@mainlineproducts.com.

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