Using Thompson's Water Seal
 

Instructions say, 'apply when surface is dry only'
Do they mean bone dry?
It hasn't rained for 3 days here and the hollow blovk wall is still damp in
places?

Thnaks.

Arhtur

Using Thompson's Water Seal
 

Arthur wrote:
Instructions say, 'apply when surface is dry only'
Do they mean bone dry?
It hasn't rained for 3 days here and the hollow blovk wall is still damp in
places?

They do mean bone dry. The point is that the stuff sits in the pores
where the water gets in. If its in already then then it can't get out,
and the stiff can't get in

Wait till summer.


Thnaks.

Arhtur

Using Thompson's Water Seal
 

On 30 Jan, 18:42, "Arthur" wrote:
Instructions say, 'apply when surface is dry only'
Do they mean bone dry?
It hasn't rained for 3 days here and the hollow blovk wall is still damp in
places?

Thnaks.

Arhtur

If the wall is even slightly damp dont apply it. The material is meant
to be sucked into the pores of the substrate. It cannot be sucked in
if the pores are full of water.

Using Thompson's Water Seal
 

"Arthur" wrote in message
...
Instructions say, 'apply when surface is dry only'
Do they mean bone dry?
It hasn't rained for 3 days here and the hollow blovk wall is still damp
in
places?

Thnaks.

Arhtur

Yes, if it's even slightly damp, don't do it. And if you haven't already
bought the Thompsons stuff, I'd personally go for Liquid Plastics K501 -
once described by a builder friend of mine as Thompsons Waterseal on
steroids :o)

http://www.liquidplastics.co.uk/product.asp?id=163

John.

Using Thompson's Water Seal
 

On Jan 30, 6:42 pm, "Arthur" wrote:

Using Thompson's Water Seal

But, more to the point, why would you want to?

Brick walls are porous and airborne water vapour migrates through the
walls in winter, evaporating from/through the outside surface in dry
weather. If you seal the outside face, it condenses (interstitial
condensation) and can cause huge problems with damp and frost damage
to the brick faces.

It's similar to putting on a waterproof jacket.
OK in wet weather, you get less soaked.
In dry weather you get soaked by water vapour from sweat that would
otherwise evaporate harmlessly & unnoticeably.

Those plastic coating paint systems can cause the same problems.
You'll never have to paint the walls again!!!! (You may have to
rebuild them, though).

Brick walls had been around for a long time before Thompson's water
seal and their chavvy builder geezer adverts.

Using Thompson's Water Seal
 

Aidan wrote:
On Jan 30, 6:42 pm, "Arthur" wrote:

Using Thompson's Water Seal

But, more to the point, why would you want to?

Brick walls are porous and airborne water vapour migrates through the
walls in winter, evaporating from/through the outside surface in dry
weather.

But 100 year old brick walls are excessively porous, allowing more than
just vapour to pass through them

If you seal the outside face, it condenses (interstitial
condensation) and can cause huge problems with damp and frost damage
to the brick faces.


It's similar to putting on a waterproof jacket.
OK in wet weather, you get less soaked.
In dry weather you get soaked by water vapour from sweat that would
otherwise evaporate harmlessly & unnoticeably.

Those plastic coating paint systems can cause the same problems.
You'll never have to paint the walls again!!!! (You may have to
rebuild them, though).

Brick walls had been around for a long time before Thompson's water
seal and their chavvy builder geezer adverts.