Sealant for external walls
 

Hi

I'm told there is some sort of sealant I can paint on external walls
that will help repel water, and hopefully prevent damp getting into
the walls.

I can't find anything on the internet - can anyone help?

Thanks in advance

Simon

Steve wrote:
"Simon Hawthorne" wrote in message
...

Hi

I'm told there is some sort of sealant I can paint on external walls
that will help repel water, and hopefully prevent damp getting into
the walls.

I can't find anything on the internet - can anyone help?

Thanks in advance

Simon


Simon,
You should be able to buy something like Thompsons Damp Seal liquid from
most DIY sheds.

Easy to apply with a creosote/fence brush - donot try using a standard paint
brush.

Cheers
Steve



But not until the wall is dry! If not, the only way for the moisture
already in the bricks to go, is in.

Andrew

Simon Hawthorne wrote:
Hi

I'm told there is some sort of sealant I can paint on external walls
that will help repel water, and hopefully prevent damp getting into
the walls.

I can't find anything on the internet - can anyone help?

Thanks in advance

Simon


On a lot of walls this is a bad idea, and in fact makes things worse.

If you have a problem with damp, the solution is normally to fix the
cause of the damp.


NT

"Simon Hawthorne" wrote in message
...
Hi

I'm told there is some sort of sealant I can paint on external walls
that will help repel water, and hopefully prevent damp getting into
the walls.

I can't find anything on the internet - can anyone help?

Thanks in advance

Simon

Simon,
You should be able to buy something like Thompsons Damp Seal liquid from
most DIY sheds.

Easy to apply with a creosote/fence brush - donot try using a standard paint
brush.

Cheers
Steve

"Simon Hawthorne" wrote in message
...
Hi

I'm told there is some sort of sealant I can paint on external walls
that will help repel water, and hopefully prevent damp getting into
the walls.

I can't find anything on the internet - can anyone help?

Thanks in advance

Simon
Thomsons Waterseal if you want a clear coating. Onle effective on bare brick
or masonry where it can penetrate freely, and, boy does it penetrate. Best
done in the summer when the wall is bone dry. Think in terms of 10 or 20
litres rather than retail sizes. www.sovchem.co.uk
Use a solvent based masonry paint like Johnstones Stormguard if the walls
are already painted.

On 26 Feb 2005 05:33:44 -0800, wrote:

and hopefully prevent damp getting into
the walls.


Maybe I wasn't clear here guys - I don't have damp in these walls -
but I can't stretch to having the full render treatment - so was after
something I could do myself to protect the walls.

Thanks

"Simon Hawthorne" wrote in message
...
Hi

I'm told there is some sort of sealant I can paint on external walls
that will help repel water, and hopefully prevent damp getting into
the walls.

I can't find anything on the internet - can anyone help?

Thanks in advance

Simon

This stuff does the job, used it a few times.

http://www.screwfix.com/app/sfd/cat/...50 5&id=19648

On Sat, 26 Feb 2005 13:42:23 +0000, Simon Hawthorne
wrote:

On 26 Feb 2005 05:33:44 -0800, wrote:

and hopefully prevent damp getting into
the walls.


Maybe I wasn't clear here guys - I don't have damp in these walls

Whats the problem you are trying to fix?

Simon Hawthorne wrote:
On 26 Feb 2005 05:33:44 -0800, wrote:

and hopefully prevent damp getting into
the walls.


Maybe I wasn't clear here guys - I don't have damp in these walls -
but I can't stretch to having the full render treatment - so was
after
something I could do myself to protect the walls.

Thanks


OK this makes things a bit clearer. Some qs:

why do you want to render the walls? Or do you maen something else by
'render treatment'?
what are the walls made of, how old, and in what condition?
what problem are you trying to solve?

NT

On 26 Feb 2005 15:34:56 -0800, wrote:

why do you want to render the walls? Or do you maen something else by
'render treatment'?
what are the walls made of, how old, and in what condition?
what problem are you trying to solve?


The walls are brick, with the plaster straight onto the brick inside.
The house was built in 1870.

I had a dodgy drainpipe a few months ago that allowed rainwater to run
down one of the gable ends - which caused some damp inside. I fixed
the drainpipe, and now, some months later, the damp has dried out.

I am renovating a barn that is attached to my house- and am going to
finish it with a tyrolean (I think that is what it is called!) finish
- which will match the house. The house gable ends are just painted -
or a very thin layer of something - but not render.

I can't sretch to have the lot tyroleaned - and thought I could
prevent any future damp spots and just help protect the house with
some sort of water repellant finsh.

Thanks

Simon

Simon Hawthorne wrote:
On 26 Feb 2005 15:34:56 -0800, wrote:

why do you want to render the walls? Or do you maen something else
by
'render treatment'?
what are the walls made of, how old, and in what condition?
what problem are you trying to solve?


The walls are brick, with the plaster straight onto the brick inside.
The house was built in 1870.

I had a dodgy drainpipe a few months ago that allowed rainwater to
run
down one of the gable ends - which caused some damp inside. I fixed
the drainpipe, and now, some months later, the damp has dried out.

I am renovating a barn that is attached to my house- and am going to
finish it with a tyrolean (I think that is what it is called!) finish
- which will match the house. The house gable ends are just painted
-
or a very thin layer of something - but not render.

I can't sretch to have the lot tyroleaned - and thought I could
prevent any future damp spots and just help protect the house with
some sort of water repellant finsh.

Thanks

Simon

ok, victorian houses work very differently to modern buildings when it
comes to handling damp. Waterproof coatings on the bricwork actually
worsen damp problems. AFAIC see you dont have a problem that needs
solving, nor a wall that is for any reason in need of protection.

To find out more about Vic houses, damp and treatments,
http://www.periodproperty.co.uk/cgi-...sing/forum2.pl

In most cases it is not advisable to apply render to unrendered Vic
buildings.


NT