Laying concrete wall copings 

So my cement based primer went on easier do you mean?

@@SamDaviesBuilder no Not at all Just get ur donkey pva them before he pass you them

Yea drip lines are definitely the best option. Unfortunately the ones the merchants sell round here never have drip lines!

​@SamDaviesBuilder just cut them yourself. Otherwise it's algae central

You’d be amazed how many copings are put on without primer. The heavier ones you might not notice on as much but ones like I’ve got in the video pop off so easily without primer. Thanks for watching and glad the video helped!

What primer do u recommend

Thanks for the advice 😃

I just use plasticiser as an additive. No need to make it waterproof as the wall underneath is going to get no matter what…

I've used just water and cement to do this.

Hi John, I used a cement based primer/bonding slurry. Like the product in this link but there is loads of companies doing similar www.protilertools.co.uk/product/ultra-scape-pro-prime-polymer-modified-slurry-primer-20kg?gclid=Cj0KCQjwhY-aBhCUARIsALNIC06nzkcp2Torc-6kUUeuiOdWFGMOqHwlekB3uKuYQb-vWyMUaK5Na3EaApm6EALw_wcB

Hi, I did 4:1 on this. I wouldn’t go any stronger than that, 2:1 is way overkill in my opinion. You shouldn’t use PVA outside as it’s water soluble. Tell your builders to use a cement based primer or sbr mixed with cement to form a paste for on the back of the copings. You can even put it on the top of the wall just as you’re putting the mortar bed out for the copings. You won’t have any loose copings if you use a primer in the correct way - just no PVA 😃

​@@SamDaviesBuilderThanks for that mate, I will be copying your way I have gone ahead and order 2 bags of the same stuff you used (you posted a link in another comment Ultra Scape Pro-Prime Polymer Modified Slurry Primer 20kg I'll ask him to mix a bit at a time so it doesn't set too quick gona order sand and cement tommorow and ask him to do 4:1 I have spent a lot on the stones and am getting patio laid in a couple of weeks would be a pain if I had to get them redone, I appreciate alot thanks mate 👍

@@theinternet8853 no worries, hope it all goes well 😃

They are a ‘twice weathered concrete coping’ 600mm long and 275mm ish wide

Yes I still would use it. Possibly could be a bonding slurry or bonding primer? You can make your own using SBR and cement mixer together - just make sure you lay the coping while the primer is still tacky on the back

We will see 🤣

As long as you put primer on the coping like Sam is they shouldn't go anywhere

I see so many people laying them without priming. Even using PVA which is better than nothing but still not suitable for outdoor use. Has to be a cement based slurry primer on the back of the coping prior to laying or they just won't stick - too smooth to bond properly without a primer. Nothing worse than seeing a nice new wall built then not long after copings all over the place because the slightest touch will move them when they haven't been primed. Also seeing poor pointing on a lot of them and that's another route to failure!

Sbr bond and cement mixed wet and a 4inch roller to coat underside of coping will do the job. Great video thanks for showing

@@paultant6741 good tip there Paul and thanks 😀

Hi Sam can I use lime as an additive to the cement slurry, I'm in a tropical environment