Re pointing between slabs ? How to do it

[Mojo12345]

Hi everyone the cement between my slabs in the garden is wearing away, and weeds are growing through, how do I repoint or refill the gaps between the slabs to get a good seal, do I use a mix of cement and sand? And how do I stop cement going into slabs as it stains and marks them, what type of mixture is best any advice or help would be great thank you

 

[conny]

Chip/scrape out ALL the old stuff so you have nice clean edges between the slabs.
Make up a dry mix of 4 parts mortar or sand with 1 part cement and brush it between the gaps. Press it down firmly because it will shrink when it dries out. Once it's packed in simply use a hose on light spray to wet it and allow to set.

 

[Mojo12345]

Ok great idea thank you can I use postcrete cement or should I just use normal cement?

 

[Mike13]

the gravel in postcrete would be too big for pointing, ditto for the "sharp sand" sold by some high st type merchants, look at the reviews online first

 

[lonner]

You would be better off using geo-fix jointing compound or similar.

Dry mix and damp down is very amateur and will last about a month before weeds re appear.

Wet mortar is the best applied with a mortar gun for diy and pro.

https://www.screwfix.com/p/roughneck-brick-mortar-gun/67965

 

[Mojo12345]

Ok thanks what is the wet mortar mix? Or do I buy a ready made mortar mix?

 

[lonner]

4:1 , brick laying wet if using a mortar gun.

 

[Mojo12345]

4 mortar to 1 cement? Sorry I’m a novice at this

 

[lonner]

4 mortar to 1 cement? Sorry I’m a novice at this

Yes you are asking that.. avoid using cement.
Use geo-fix ,you simply pack into joint and finish with a brick iron.

 

[Mojo12345]

4 mortar to one geo fix lol or no mortar just geofix how confusing