External rendering additives

Jkb · 23 Dec 2018

hi,

I am planning on rendering an extension wall but I first have to scrape off the old stuff, which should not be a problem as it’s quite dry and flakes off just by rubbing it with your hand. I plan on mixing my own plastering sand and cement. I have 2 questions:

1. When I scrape down to the brickwork, is there anything I should be treating the brickwork with before I render, bonding, waterproofing solution etc....

2. When I prepare my rendering mix, is there any other additives I should be adding before mixing?

Thanks in advance

Alastairreid · 23 Dec 2018

Use an sbr slurry to prime the wall.
Waterproofer in scratchcoat and plasticiser in your finishing coat.

Jkb · 24 Dec 2018

Hi

Thanks........ for the hard of thinking (me)

what’s an sbr slurry and what quantities should I apply?

Thanks in advance

Jkb · 24 Dec 2018

It’s ok, I just googled it......duh, why didn’t I think of that.....cheers

roughcaster · 24 Dec 2018

Don't even think about it in freezing conditions. External rendering, roughcasting etc at this time of year is not really recomended, and also, cover your sand up.

Jkb · 24 Dec 2018

All good.... I plan to do the job spring next year.

Cheers

roughcaster · 24 Dec 2018

The best way Jkb.

diynot

If you need to find a tradesperson to get your job done, please try our local search below, or if you are doing it yourself you can find suppliers local to you.

Select the supplier or trade you require, enter your location to begin your search.

Are you a trade or supplier? You can create your listing free at DIYnot Local

External rendering additives

Similar threads