Hi

I have an external wall that forms the boundary of the yard. It is in a rather scruffy state and the pointing needs doing.

Ideally I’d like to render and paint it, but if I render it, do I need to do the pointing as well?

Also, presumably the render can’t go below the damp proof course, so how do you finish the area below there?

Many thanks

Seán

wrote:
Hi

I have an external wall that forms the boundary of the yard. It is
in a rather scruffy state and the pointing needs doing.

Ideally I’d like to render and paint it, but if I render it, do I
need to do the pointing as well?

Also, presumably the render can’t go below the damp proof course, so
how do you finish the area below there?

You need bell beading to go along the bottom (dpc) which will form a
dripper.
Below this level, I normally paint with black bitumen paint.
Don't render it while there's a chance of frost, or if there's frost still
in the wall....you don't need to point it as the open joints will act as a
key for the render, which will need doing in two coats

That's exactly what I needed to know thank you.

As frost pretty much rules out doing this for the foreseeable future, can you do the pointing when there is frost about?

On 12/12/2012 18:37, wrote:
That's exactly what I needed to know thank you.

As frost pretty much rules out doing this for the foreseeable future, can you do the pointing when there is frost about?


Looks up "you don't need to point it"

In fact the implication is you shouldn't, the render will hold on better
if you don't.

Andy

wrote:
That's exactly what I needed to know thank you.

As frost pretty much rules out doing this for the foreseeable future, can you do the pointing when there is frost about?

Pointing is not recommended while there is frost about for the same
reasons you don't render when there's frost about. You don't do anything
involving any cement based product when it's freezing unless it's an
emergency, you know what you're doing and have the right additives
sorted out, and even then it's accepted that it will be a temporary job,
to be re-done when the temperature rises.

--
Tciao for Now!

John.

I suspected as much, arse

wrote:
That's exactly what I needed to know thank you.

As frost pretty much rules out doing this for the foreseeable future,
can you do the pointing when there is frost about?

It doesn't need pointing if you are rendering it, but whichever you decide
to do will have to wait until it's been above freezing for at least 72 hours
as deep frost inside the wall will take at least this long to thaw.
Whichever you decide to do, you'd be wise to add some frostproofer and
hardener (B&Q or any BM) and only mix it in small batches as it goes off
quickly

It doesn't need pointing if you are rendering it, but whichever you decide

to do will have to wait until it's been above freezing for at least 72 hours

as deep frost inside the wall will take at least this long to thaw.

Whichever you decide to do, you'd be wise to add some frostproofer and

hardener (B&Q or any BM) and only mix it in small batches as it goes off

quickly


Thanks for all the help, I and my wall appreciate it

On Dec 13, 2:59*pm, "Phil L" wrote:
wrote:
That's exactly what I needed to know thank you.

As frost pretty much rules out doing this for the foreseeable future,
can you do the pointing when there is frost about?

It doesn't need pointing if you are rendering it, but whichever you decide
to do will have to wait until it's been above freezing for at least 72 hours
as deep frost inside the wall will take at least this long to thaw.
Whichever you decide to do, you'd be wise to add some frostproofer and
hardener (B&Q or any BM) and only mix it in small batches as it goes off
quickly

er... if the inside "core" of the wall is at -1 and the surface at say
+4 why would you have to wait until the core defrosts before rendering
the surface?

Jim K

Jim K wrote:
On Dec 13, 2:59 pm, "Phil L" wrote:
wrote:
That's exactly what I needed to know thank you.

As frost pretty much rules out doing this for the foreseeable
future, can you do the pointing when there is frost about?

It doesn't need pointing if you are rendering it, but whichever you
decide to do will have to wait until it's been above freezing for at
least 72 hours as deep frost inside the wall will take at least this
long to thaw. Whichever you decide to do, you'd be wise to add some
frostproofer and hardener (B&Q or any BM) and only mix it in small
batches as it goes off quickly

er... if the inside "core" of the wall is at -1 and the surface at say
+4 why would you have to wait until the core defrosts before rendering
the surface?

Because the moisture frozen inside the wall has expanded, and when it thaws
it shrinks....trying to render bricks that are still frozen on one side
isn't a good idea

It doesn't need pointing if you are rendering it, but whichever you decide

to do will have to wait until it's been above freezing for at least 72 hours

as deep frost inside the wall will take at least this long to thaw.

Whichever you decide to do, you'd be wise to add some frostproofer and

hardener (B&Q or any BM) and only mix it in small batches as it goes off

quickly

When you come to paint this render, do you have to do a **** coat first ?

wrote:

When you come to paint this render, do you have to do a **** coat
first ?

Not on render, only on new internal plaster.
For external rendering, it's best having two normal coats of decent quality
exterior masonry paint, unthinned