Drainage for rendered breeze block sleepers

Hi guys

we’ve recently had two breeze block flower beds built and k rend applied to outside

with the rain the last couple of day’s they have become quite wet and discoloured especially where water has dropped from the joins of the coping.

Any recommendations for drainage and proofing? Was thinking of applying a tanking paint to inside of beds and
Filling bottom of beds with gravel before soil and compost.

Any help and advice be much appreciated!

thank you in advance

 

Pictures would be a great help please David.

 

Hi,

+ what @Sheal mentions, plus what height are they and are they really the lightweight breeze blocks or more the heavy dense concrete blocks ?

With either they will 'leak' from all sides and really need to be coated /sealed on all sides and joints, but that can only be done once they are completely dry again.

Again without seeing them, it might be better to put some kind of facing over them, rather than trying to waterproof them ... ?

 

See attached photos chaps.... hopefully enough info...they are the heavy dense blocks

 

Hi,

Thats a difficult one as a lot of the water marks look like its where its run down from the top slab joints, possibly also going down the joint and then coming through the back of the render ..?

You could apply some liquid Wall Water Sealer to those exposed top joints and see if that helps.

I would say paint the inside of the walls with the same or a few coats of standard masonry paint and then line it with some sheets of polythene /dpm etc which should help reduce leakage though the wall once the soil in .

eg https://www.screwfix.com/p/capital-valley-plastics-ltd-damp-proof-membrane-black-1000ga-3-x-4m/50464

 

I have consulted with my friendly Meercats. Simples came the reply. Drill some drainage holes at the base. Masonary drill bits or even the drill bits used by plumbers that take out holes, suitable for pipes to pass through.

 

Also is damp rising from the ground

 

Have been told drill holes not necessary as there is no base (just soil no concrete)... am
Hoping tanking paint on inside (with perhaps some dpm on sides) and a good couple of inches hardcore/gravel at base should suffice....?

 

Hopefully, but one concern is that the water may have partly affected the adhesion between the render and the blockwork, which may lift off in time, partic when any frost arrives ?

Think after treating the inside and filling it with soil/compost just see how it looks after the winter.

 

I agree Ricky. I'd probably take it a step further and coat with a sealer and masonry paint on the inside, then line it as you say. I'm thinking 'belt and braces'.

Drainage will be good without a solid base and there's no reason why you shouldn't add the gravel.

 

Thanks chaps very much appreciated

 

You're welcome.