Description
This 15mm bellcast bead is a white PVC drip bead sold in 2.5 m lengths. It finishes the bottom edge of a render coat above the damp proof course or over a window or door head, giving a straight line and a drip that turns rainwater off the wall. It is the larger size in the Renders World bellcast range, made for a deeper coat.
The 15mm Bellcast Bead: What You Get
One length is 2.5 m of white PVC profile, with no mesh attached. The photograph on this listing is the one picture used for both sizes in the range, and its file is named for the 3 m bead, so it shows the shape of the pair rather than this 15 mm profile: a perforated wing with two rows of large openings, a line of small round holes lower down and a nose turned out along the bottom.
Two points decide the order:
- Size: in the UK trade a bellcast is named after the depth of render it is made to finish, so the 15 mm bellcast is the choice where the coat at the bottom edge runs deeper. Measure the coat where it will stop, not the average across the wall.
- Length: 2.5 m. The smaller size in the same range comes in 3 m lengths, so the two do not cut to the same runs.
Choosing Between the Two Sizes
| Size | Length | Listing |
|---|---|---|
| 10 mm | 3 m | 10 mm bellcast in 3 m lengths |
| 15 mm | 2.5 m | This bead |
Makers that publish a depth range for each bellcast size let neighbouring sizes overlap, so a coat near the boundary between 10 mm and 15 mm can fall inside both. Size names are not used identically across the trade either: one merchant describes a maker's 15 mm bellcast for a thinner coat than the maker's own table gives it. This listing states no range of its own, so on a coat close to the boundary the detail drawing of your render system decides between the two.
A Drip at the Bottom, a Stop Bead at the Sides
Renders World also sells a 15 mm stop bead in white PVC, also 2.5 m long. The two share a size and a length, which makes them easy to confuse in a basket:
- This 15mm bellcast bead: the bottom edge of the render, above the damp proof course and over the heads of windows and doors, where water running down the wall is turned off at the edge.
- The stop bead: the sides of openings, the line under a soffit or a change to another material, where the render simply stops along a straight line.
Count the bottom edges and the opening heads for the bellcast, count the sides and soffits for the stop bead, and order each profile against its own count.
Counting 2.5 m Lengths
Take each horizontal run the bead will finish, divide it by 2.5 m and round up:
- a 10 m plinth takes 10 ÷ 2.5 = 4 lengths;
- a 12 m plinth takes 12 ÷ 2.5 = 4.8, so five lengths, the fifth cut down;
- a 1.2 m window head takes one length and leaves a 1.3 m offcut, enough for the next head of 1.3 m or less.
Because the 3 m bead cuts to different runs, work the count out for the bead you are ordering rather than converting a total from the other one.
What the Listing Leaves Open
For the 15mm bellcast bead the shop gives the size, the length, the colour and the material. There is no manufacturer, product code or data sheet behind it, and no wing width, nose projection, hole size, fixing method or fixing centres. No standard, classification or certificate is stated for it either, and the photograph does not show this size.
Where a specification names a particular maker or system detail, ring Renders World on 023 8200 2442 and settle the choice before the order goes in.
Fitting the Bead
The render is finished against the bead. Three guides cover the method and the details around it:
- The drip edge itself: setting the line above the damp proof course and over openings, in the drip detail and water protection guide.
- Openings: how drip, stop and corner profiles meet around a window or door, in render detailing at windows and doors.
- Choosing profiles: which bead belongs on which edge of the wall, in the guide to which render bead for which detail.
Ordering, Delivery and Returns
Renders World processes orders the same day when the stock is there. Order the beads with the render they finish, so the size is matched to the coat in one basket.
- Delivery: quoted by the team after the order; parcels up to 25 kg go next day, always kerbside.
- Collection: from the counter at Unit 9A, Central Trading Estate, Southampton SO14 5JP, Monday to Friday 7am to 5pm and Saturday 7am to 12pm.
- Returns: goods bought directly from Renders World can go back within 14 days in their original condition; special orders and promotion purchases are excluded.
FAQ
How long is one length?
Each 15mm bellcast bead is 2.5 m long. The 10 mm size in the same range comes in 3 m lengths.
Which render thickness is it for?
The 15mm bellcast bead is for a deeper coat. Where the coat at the edge is near the boundary with the 10 mm size, follow the detail drawing of your render system.
Is the photograph of this size?
No. Both bellcast listings use the same picture, named for the 3 m bead. It shows the shape of the profile, not the 15 mm depth.
Can the 15 mm stop bead do the same job?
Not at a bottom edge that has to shed water. The drip is what the bellcast adds: it is the bead made to turn rain water off the wall at that edge. A stop bead is chosen where the render simply stops along a line.
Who makes this bead?
The listing does not name a maker or a product code. If your specification calls for a particular one, ring 023 8200 2442 before ordering.