Exterior wall cement collar

[soyabean]

Hi all

What is the cement collar that surrounds the bottom 2 to 3 feet of my exterior walls called? Is there any advice and or products for repairing it as it's crumbling?

Soyabean

[welsh brickie]

Unsure what you mean by collar.If it crumbling you need to remove the loose material and stabilize it by painting it with a unibond pva solution, and repair it with sand/cement/lime 4:1:1 mixture and add a waterproofing agent,like opti-mix render addative.

[soyabean]

Thanks Welsh brickie. What quantity of the waterproof agent would you recommend? Also, Wickes do a ready made mortar mix, don't want to cut corners but is it worth using it?

Soyabean

[welsh brickie]

the mortar mix from wicks isnt that good,try your local builders merchants.