render bricks

[bananaspark]

I've read various good advice about 4 -1 sharp sand/cement +feb for internal brick , and also rapidset floortile for bathroom breezeblock (before tiling over).

But how to prep the walls in both cases?
pva or not (why would it be necessary in both cases if walls have been washed clean and are not dusty?) also how much water to dampen walls b4 rendering, -a full on hosepipe soaking or jet from spraygun?
b/

 

[FredFlintstone]

Hi banana,

No PVA, just a wetting down. Probably no need for a full on hose down - as long as the bricks are damp then you'll be fine but a spraygun may not get enough water on the wall. You'll find the blockwork sucks the water in rapidly. You basically wat it so that it's not sucking it in so fast. Wet a small patch and see what it does - you'll see what I mean but there's no hard and fast rule as to how much water is needed - different surfaces act differently.

Regards

Fred

 

[diyisfree]

Banana,

As Fred says, The amount of water required will vary. I use an hose pipe if theres one around.

Give it a good soak mate, then leave it for 10 mins before you start.

There is a basic video on This site that shows applying the final coat. It may help a little.
There are a couple of media player files you can watch.

Good luck mate.

Oh forgot to say, dont forget the lime in your mix.

4:1:1 for scratch then 5:1:1 for your top coat

should look something like this when you have finished.