How to repair concrete door jamb?

[greg303]

Hi everyone,
I’m renovating a unit and there’s a large section of render missing from the door jamb.
What’s the best method to repair the jamb so it’s properly prepared for tiling?

Thanks you,

Greg

[JacobZ]

Hi @greg303,

Considering it is going to be tiled over, the surface doesn't need to be exceptionally smooth, which makes the repair a bit easier.

My suggestion would be to fill the gap with a repair mortar such as this Dingo Fast Set Mortar.

Add clean water slowly and mix until the mortar is stiff enough to stay on a trowel when turned sideways, but still workable. It should be closer to a thick putty than a flowing mix.

You can then apply the mix to the gap, pressing it in so that it sticks firm and then smoothing the surface and shaping the corner.

If there is any inconsistency in the surface, allow it to dry for 10-20 minutes so that it has firmed up a bit, then scrape it back with your trowel.

You should then allow it to dry and cure for at least 48 hours before tiling over the top.

Let me know if you have any further questions.

Jacob

[greg303]

Hi  Jacob,

Thank you for the reply, most grateful.

On side of the jamb will be painted so you think the dingo will be fine for painting, if I seal it first?

Thank you

Greg

[JacobZ]

Hi @greg303,

Yes, it would be fine to paint as long as you apply a coat of a sealing primer such as Dulux 1Step Prep Primer, Sealer & Undercoat beforehand.

Let me know if you have any further questions.

Jacob