Description
This 10mm bellcast bead is a white PVC drip bead sold in 3 m lengths. It goes where the render stops above the damp proof course or over a window or door head, giving the coat a straight bottom edge with a drip that turns rainwater off the wall. It is the smaller of the two bellcast sizes at Renders World, and the only one cut to 3 m.
Five Reasons to Choose This Bellcast
- Sheds water at the edge. A bellcast stops the render above the damp proof course and over openings and turns rain off the wall instead of letting it run down the plinth.
- A straight bottom line. The render is finished against the bead, so the bottom edge of the coat runs dead straight along the wall.
- Protects the edge. The PVC nose takes the knocks that would otherwise chip the bottom of the render.
- Fewer joints on long runs. At 3 m a length, a 12 m plinth takes four beads instead of five in 2.5 m lengths.
- Sized for the thinner coat. The 10 mm bead is the one for a thinner render; the 15 mm sibling finishes the deeper coat.
The 10mm Bellcast Bead: What You Get
| Property | This bead |
|---|---|
| Size | 10 mm |
| Length of one bead | 3 m |
| Material and colour | White PVC |
| Profile | Perforated wing, drip nose along the bottom |
| Mesh | None |
In the UK trade a bellcast is named after the depth of render it is made to finish, so the 10 mm bead is the one for the thinner coat. Measure the coat where it will stop, not the average across the wall.
10 mm or 15 mm: Choosing the Size
The bellcast range holds two sizes, and they differ in two ways at once:
| Size | Length | Bead |
|---|---|---|
| 10 mm | 3 m | This 10mm bellcast bead |
| 15 mm | 2.5 m | 15 mm bellcast in 2.5 m lengths |
Makers that give a depth range for each bellcast size let neighbouring sizes overlap, so a coat near the boundary between 10 mm and 15 mm can sit inside both. Where your coat is close to that line, the detail drawing of the render system you are using decides the size.
Bellcast or Stop Bead at the Same Size
Renders World also sells a 10 mm stop bead in white PVC. The two share a size and are easy to swap in a basket, but they finish different edges:
- This 10mm bellcast bead — the bottom edge of the render above the damp proof course, or a window or door head, where water running down the wall is turned off at the edge.
- The stop bead — the side of an opening, under a soffit or against another material, where the render simply stops along a straight line.
Most elevations need both. List the bottom edges and the heads of openings for the bellcast, list the sides and soffits for the stop bead, and order each profile against its own list.
How Many 3 m Lengths a Run Takes
Measure each horizontal run the bead will finish, divide by 3 m and round up:
- a 12 m plinth takes 12 ÷ 3 = 4 lengths;
- a 7 m plinth takes 7 ÷ 3 = 2.3, so three lengths, the third cut down;
- a window head is a run of its own: a 1.2 m head takes one length and leaves a 1.8 m offcut for the next head of 1.8 m or less.
The same 12 m plinth in the 2.5 m size would take 12 ÷ 2.5 = 4.8, so five lengths and four joints instead of three.
Before a Large Order
- Measure the coat at the edge — near the 10/15 mm boundary, follow your render system's detail drawing.
- Split the edges — bottom edges and heads for the bellcast, sides and soffits for the stop bead.
- Bring the specification — if it names a particular maker or system detail, ring Renders World on 023 8200 2442 with it 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 bellcast 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
- Dispatch — Renders World processes orders the same day when the stock is there; put the beads in the same basket as the render they finish.
- 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 10mm bellcast bead is 3 m long. The 15 mm bellcast in the same range is 2.5 m, so the two sizes do not cut to the same lengths.
Which render thickness is it for?
It is the 10 mm size, the one for the thinner coat. Where the coat at the edge is near the boundary with the 15 mm size, follow the detail drawing of your render system.
Does it come with mesh?
No. The 10mm bellcast bead is a plain PVC profile with a perforated wing and no mesh attached.
Can a stop bead do the same job?
Not at a bottom edge that has to shed water. The drip is what the bellcast adds; a stop bead is for edges where the render simply stops along a line.
Can I order it against a specification?
Yes. If your specification names a particular maker or system detail, ring 023 8200 2442 with it and settle the choice before the order goes in.
Does it go over windows as well as at the plinth?
Yes. A bellcast finishes both the bottom edge of the render above the damp proof course and the head of a window or door, wherever water running down the wall should drip off the edge.