Hi all,

I need to paint a rendered extension with some Dulux Weathershield.
What is the right proportion to water down the paint by for the
initial coat?

Cheers!

Martin

Martin Pentreath wrote:
Hi all,

I need to paint a rendered extension with some Dulux Weathershield.
What is the right proportion to water down the paint by for the
initial coat?


The actual Dulux Weathershield usage guide to follow depends on which of
the many Weathershield products you intend using. For example:

http://www.dulux.co.uk/products/info...onry_paint.jsp
http://www.dulux.co.uk/products/info/usage/weathershield_textured_exterior_masonry_paint.jsp

The usage guides indicate the dilution to use on new or bare surfaces.
Is this information not on the tin?

--
Rod

Hypothyroidism is a seriously debilitating condition with an insidious
onset.
Although common it frequently goes undiagnosed.
www.thyromind.info www.thyroiduk.org www.altsupportthyroid.org

On 21 Mar, 12:51, Rod wrote:

The actual Dulux Weathershield usage guide to follow depends on which of
the many Weathershield products you intend using. For example:

http://www.dulux.co.uk/products/info...d_smooth_mason...
http://www.dulux.co.uk/products/info/usage/weathershield_textured_ext...

The usage guides indicate the dilution to use on new or bare surfaces.
Is this information not on the tin?

Many thanks for the prompt reply Rod, and yes you're right, it says
that on the tin! I'll go and sit in the corner ...

Martin Pentreath wrote:
Hi all,

I need to paint a rendered extension with some Dulux Weathershield.
What is the right proportion to water down the paint by for the
initial coat?

Cheers!

Martin

It's a bit like thinning custard. If you shake it enough you may get the
illusion of a uniform consistency but the two phases, water and resin,
are always separate. The water you've added soaks into the render,
together with (depending on the porosity) essential solvents from the
paint itself, making it difficult for a proper film to develop.
I prefer to use a stabilising solution and then the paint straight from
the tin

On Fri, 21 Mar 2008 13:03:11 GMT, Stuart Noble
wrote:

Martin Pentreath wrote:
Hi all,

I need to paint a rendered extension with some Dulux Weathershield.
What is the right proportion to water down the paint by for the
initial coat?

Cheers!

Martin

It's a bit like thinning custard. If you shake it enough you may get the
illusion of a uniform consistency but the two phases, water and resin,
are always separate. The water you've added soaks into the render,
together with (depending on the porosity) essential solvents from the
paint itself, making it difficult for a proper film to develop.
I prefer to use a stabilising solution and then the paint straight from
the tin

Can you enlarge on a description of a stabilising solution please ?

wrote:
On Fri, 21 Mar 2008 13:03:11 GMT, Stuart Noble
wrote:

Martin Pentreath wrote:
Hi all,

I need to paint a rendered extension with some Dulux Weathershield.
What is the right proportion to water down the paint by for the
initial coat?

Cheers!

Martin
It's a bit like thinning custard. If you shake it enough you may get the
illusion of a uniform consistency but the two phases, water and resin,
are always separate. The water you've added soaks into the render,
together with (depending on the porosity) essential solvents from the
paint itself, making it difficult for a proper film to develop.
I prefer to use a stabilising solution and then the paint straight from
the tin

Can you enlarge on a description of a stabilising solution please ?

Any proper paint outlet should stock it. This is the kind of thing,
though it looks a little expensive for what it is

http://www.decoratingdirect.co.uk/vi.../t/TORSTABSOL/

Interestingly the Dulux Weathershield instructions expressly say:

"If the surface is still powdery after thorough preparation, seal it
with a coat of Weathershield Stabilising Primer, but do not seal
sound, new or bare surfaces."

Martin Pentreath wrote:
Interestingly the Dulux Weathershield instructions expressly say:

"If the surface is still powdery after thorough preparation, seal it
with a coat of Weathershield Stabilising Primer, but do not seal
sound, new or bare surfaces."


Slightly ambiguous! Good old Dulux. It's really a question of how porous
your new render is rather than how it looks or feels. I suppose if the
stabiliser couldn't penetrate, and formed a clear film on the surface,
you might have trouble getting the paint to cover well i.e. you'd see
brush strokes, but I can't see that happening on normal render. Also,
bear in mind that stabiliser is much more penetrative than water.

The problem with all water based paints is that they contain solvents
which evaporate after the water phase so, although the paint is touch
dry, they are still hanging around ensuring proper film formation. If
they get sucked into the substrate, you tend to end up with a coating
that looks fine but isn't continuous at a microscopic level.

Martin Pentreath wrote:
Hi all,

I need to paint a rendered extension with some Dulux Weathershield.
What is the right proportion to water down the paint by for the
initial coat?

Cheers!

Martin
a bit. Till its still got color, but is more opr less watery. IIRC we
did it about 2 paint one water.

Martin Pentreath wrote:
Interestingly the Dulux Weathershield instructions expressly say:

"If the surface is still powdery after thorough preparation, seal it
with a coat of Weathershield Stabilising Primer, but do not seal
sound, new or bare surfaces."

I did get frost damage where I get driving rain..bouncing off flat
lintels over the windows etc. ..use a penetrating sealer on north and
west exposed areas.