Do I need a Bellcast bead?

Bell cast beads allows any water running down the face of the render to drip straight off. It is important to use the bellcast bead and not a stop bead, as the angle it creates stops water running back towards the wall underneath the bead.

What is the purpose of a Bellcast bead?

PVC bellcast beads are designed to provide a stop to the render just above the damp proof course and the reveals to provide a straight edge, protect against impact and to deflect rain water. Bellcast beads can also be an architectural feature by being used at each storey to provide a shadow.

What is a Bellcast?

1 Sprocketed eaves with sprockets or cocking-pieces fixed to the top of the common rafters above the eaves so that the roof above the eaves has a flatter pitch. 2 Projecting finish, or bell-cast piece, at the bottom of harling, render, or roughcast finish on a wall, resembling the base of a bell, forming a drip.

How do you fix Bellcast beads?

Fix bellcast beads onto a continuous line of render dabs, or better still, onto adhesive mortar to prevent slipping. Alternatively nail clouts or hammer-in plug fixings can be used along the length of the bellcast bead every 300-700mm. The beads are rigid enough for one person to fix alone.

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Do you need render beads?

The beading or trim used in an external render system might be more important than you think. Using the correct type of render beads for a rendered façade will ensure the best finished look, ensure durability and help protect the render from water damage, staining and cracking.

How thick should render be?

Render prepared on site using standard sand and cement must be at least 20 to 25mm thick. However, the capability of the render is dependent upon the quality of the sand used, the design mix and is heavily reliant on good mixing techniques by the applicator.

Should you render over damp course?

Generally rendering below DPC is not advised (because it creates a physical DPC bridge). … Render below DPC is removed back to substrate.

Can you render past damp proof course?

You will need to mark a line on the wall where your damp course really is, then with a grinder cut a line maybe an inch or two above the line, then with a small breaker (kango), remove the render from below your cut. … As for the ground level, ensure its always at least 150mm below the damp course.

What size render beads do I need?

In brief, the minimum finished thickness of render should be no less than 15mm for sheltered to moderate exposure areas and 20mm for severe. Please note that insufficient thickness of render will prevent the ability of the render to provide the required weather resistance and protection.

What is a drip bead?

The Bellcast, or Drip Bead, is designed to prevent water accumulation in outdoor renders. Water drips through the design of the bead with its multiple holes. There is no staining resulting from the installation of this specialised bead.

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What is a stop bead?

A stop bead is any kind of bead that is attached to the tail end of your thread. It prevents the beads in your project from falling off the end of the thread and is not usually part of the final beadwork. It is good practice to use a bead that is easily identified as being separate to your final jewelry.

What to use to stick render beads?

“Secure all beads with tacks. I suggest stainless steel. You can also bed the beads on with sand and cement, the same material you’re using to render.

What is the best mix for rendering?

A common mix ratio used for rendering is 6 parts sand, 1 part cement and 1 part lime. Any general purpose cement can be used, although the sand should be fine and clean of impurities. Coarser sand is usually used as the base layer and slightly finer sand for the top layer.

How do you fit stop beads?

Fixing top coat stop beads is easy. They can be nailed on using short galvanised nails into the studs behind the plasterboard or stuck on with a small amount of skim. This is done by marking a line where you want to fix the beads, then placing a small “dollop” of skim on that line every 900mm or so.