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Simon May 3rd 07 06:51 PM

External render question
 
Hi there,

I'm plnning to render an external wall. It's concrete block
construction in the main, with 2 courses of brick just under DPC, then
more concrete blocks.

When I render the wall, is it best to stop just before the DPC with a
drip bead, then continue render below the DPC - thereby avoiding
breaching the DPC?

Also I'm planning to complete this work over a number of 2 hour slots
in the evening - how best to split this up - I was thinking dividing
the wall into "strips" and doing one a night, keeping it wet as it's
quite warm outside at the moment.

Also, what's a good mix for this type of coating and to what depth
should I go. Also also just one render or do I build it up in tow
layers?

Any advice appreciated!

Thanks.

Simon


Simon May 4th 07 06:36 PM

External render question
 
On 3 May, 18:51, Simon wrote:
Hi there,

I'm plnning to render an external wall. It's concrete block
construction in the main, with 2 courses of brick just under DPC, then
more concrete blocks.

When I render the wall, is it best to stop just before the DPC with a
drip bead, then continue render below the DPC - thereby avoiding
breaching the DPC?

Also I'm planning to complete this work over a number of 2 hour slots
in the evening - how best to split this up - I was thinking dividing
the wall into "strips" and doing one a night, keeping it wet as it's
quite warm outside at the moment.

Also, what's a good mix for this type of coating and to what depth
should I go. Also also just one render or do I build it up in tow
layers?

Any advice appreciated!

Thanks.

Simon




Advice anyone? :-)



Cicero May 4th 07 07:02 PM

External render question
 
On Fri, 04 May 2007 10:36:16 -0700, Simon wrote:

On 3 May, 18:51, Simon wrote:
Hi there,

I'm plnning to render an external wall. It's concrete block construction
in the main, with 2 courses of brick just under DPC, then more concrete
blocks.

When I render the wall, is it best to stop just before the DPC with a
drip bead, then continue render below the DPC - thereby avoiding
breaching the DPC?

Also I'm planning to complete this work over a number of 2 hour slots in
the evening - how best to split this up - I was thinking dividing the
wall into "strips" and doing one a night, keeping it wet as it's quite
warm outside at the moment.

Also, what's a good mix for this type of coating and to what depth
should I go. Also also just one render or do I build it up in tow
layers?

Any advice appreciated!

Thanks.

Simon




Advice anyone? :-)

===============================
Render is usually applied in two coats. The first is a thin coat and is
scratched or scored with a trowel or a nail comb whilst it's still soft to
produce a key for the second coat. This first coat is called a 'scratch
coat' for obvious reasons.

The second coat is applied when the first coat has hardened - a day at
least later. Most people apply this second coat in strips or bays as you
suggest but others prefer to do it in broken areas to avoid seeing a
draughtboard effect in the finished job. This finish coat(about 3/4" +
thick) can be trowelled smooth or wiped with a wet sponge in a circular
pattern.

It's not normal practice to render below the damp-proof course. Finish
with a drip strip about an inch above the DPC and leave the course below
clean.

People argue about the best mix(es) but something about 4:1 soft sand /
cement is about average. It's worth asking where you buy your sand for
'rendering sand' as they will almost certainly be familiar with what
tradesmen are using locally for the job.

Cic.

--
================================
Testing UBUNTU Linux
Windows shown the door
================================


The Natural Philosopher May 5th 07 08:09 AM

External render question
 
Cicero wrote:

People argue about the best mix(es) but something about 4:1 soft sand /
cement is about average. It's worth asking where you buy your sand for
'rendering sand' as they will almost certainly be familiar with what
tradesmen are using locally for the job.


I think sharp sand looks nicer..
Cic.


Cicero May 5th 07 11:34 AM

External render question
 
On Sat, 05 May 2007 08:09:53 +0100, The Natural Philosopher wrote:

Cicero wrote:

People argue about the best mix(es) but something about 4:1 soft sand /
cement is about average. It's worth asking where you buy your sand for
'rendering sand' as they will almost certainly be familiar with what
tradesmen are using locally for the job.


---------------------------

I think sharp sand looks nicer..


----------------------------------
Which confirms my point quite nicely.

The best mix is the one that you want unless you allow yourself to be
persuaded by other people. I suppose the subject was being debated quite
warmly when the first wattle and daubers started to offer their services.

Cic.

--
================================
Testing UBUNTU Linux
Windows shown the door
================================



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