External concrete steps - repairing cracks

[Mandala72]

Hi

Looking for some advice on the most approriate mortar/filler/render to fix the riser on some external steps and make them weather proof again

The surface layer has cracked and in parts come away.(see pics) The broken pieces have a black bitumen like appearance and behind them it has crumbled where it met the brickwork.

What would be most appropriate to use in this situation?


Thanks for any advice

Peter G

Untitled

• Mandala72
• 19 May 2015
• 1

Untitled

• Mandala72
• 19 May 2015
• 1

 

[noseall]

I can't work out whether they have previously been coated with s/c render or asphalt? Can you enlighten?

The failure is probably down to water wicking up from the join with the paving and has broken as a result of frost or delaminating due to excessive damp and subsequent foot impact etc.

It will be difficult to get a decent bond at this point so a redesign might be in order.

 

[Mandala72]

Thanks
It looks like asphalt to me, black and crumbly at the back, but i'm not sure.

The whole steps may need looking at long term, but I need a shorter term fix.

 

[joe-90]

An epoxy render would be the best bet.

 

[Mandala72]

Cheers.

 

[Mandala72]

apparently it is asphalt,

in which case would a bitumen mastic such as:

https://www.roofingsuperstore.co.uk/product/black-jack-bitumen-trowel-mastic-5-litres.html

be more appropriate than epoxy render ?

 

[noseall]

https://www.roofingsuperstore.co.uk/product/black-jack-bitumen-trowel-mastic-5-litres.html

be more appropriate than epoxy render ?

Not unless you want black footprints all over your hall carpet and some angry new show owners, no.

 

[Mandala72]

lol ok cheers!