Project Overview

Before you can render a brick wall, you need to prepare the external corners with angle beads. These not only give you a cleaner finish but also provide strength and prevent chipping. We’ll show you the simple steps you need to follow to prepare external corners for rendering.

Continue to step-by-step instructions
This D.I.Y. Advice is part of a series How to render

Step by Step Instructions

1 Clean and measure the wall
2 Cut the angle bead to length
3 Mix up the adhesive
4 Apply the adhesive to the corners
5 Fix the angle bead to the corner
6 Remove the excess adhesive with a trowel
7 Apply the adhesive and beads around the window
  • Step 1. Clean and measure the wall

    Before you start, make sure the surfaces of the external corners are clean. Measure the height of the external wall and if there are any windows, their height and length as well. These are the measurements you’ll use to cut your angle bead. 

  • Step 2. Cut the angle bead to length

    Transfer the measurements to the angle bead and cut it using your snips. In this case we’ve cut two for the reveals and one for the sill. When you’re cutting the angle bead, cut it on a back angle so that the edges don’t catch on the brickwork or the eaves.
  • Step 3. Mix up the adhesive

    Put on your gloves, safety glasses and dust mask, then pour some water into your mixing bucket. Add the Patch and Prep adhesive. Mix it with your trowel until it is the same consistency as toothpaste. If it is too runny add more adhesive, if it is too dry add more water.
  • Step 4. Apply the adhesive to the corners

    When applying the adhesive you want it 2mm thick and 25mm wide, either side of the corner. Applying the adhesive is the same as applying render, just flip the hawk onto the trowel to pick up the adhesive and using your ladder, apply it from the top of the wall to the bottom.

  • Step 5. Fix the angle bead to the corner

    To fix the angle bead to the corner, push it into the bed of adhesive. Use a slight up and down motion to help it sink into the adhesive. Push your straight edge, hard up against the angle bead, to make sure there aren’t any hollows or bumps in the bead. 

  • Step 6. Remove the excess adhesive with a trowel

    Leave it to dry for five minutes. Then use your trowel to remove the excess adhesive down the bead. Flatten off the excess by angling the trowel slightly and pushing the adhesive away from the bead. Do this on both sides of the bead from top to bottom.

  • Step 7. Apply the adhesive and beads around the window

    Apply a 2mm thick and 25mm wide layer of adhesive around the corners of the window ledge. Follow the same process as you did on the corners. Make sure that the beads are at right angles in all of the corners of your window. Then let the adhesive dry for five minutes and use your trowel to smooth off the excess adhesive as before. Leave for 24 hours to dry completely. 

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