Rendering and Plastering following a Damp problem
Plaster that has been wet or damaged
due to a damp problem, will remain to have salt activity present
even after the problem has been remedied. These salts in the
render/plaster and masonry are hygroscopic compounds which attract
water from the air (moisture) and into the wall (plaster &
brickwork). A completely dry wall will change when there is a
downpour of rain or rise in humidity. Because of this a completely
dry wall will never be created unless the contaminated
plaster/render has been removed.
Damprid remedies the problem of salts breaking back out in
plastered/rendered walls by using a Salt Neutraliser in the mix.
During the drying out period, salty deposits in the brickwork will
surface, depending on humidity levels. The walls are then stripped
to expose the brickwork to a safe level (at least 300mm higher
than the visually damaged render/plaster). The walls are then
re-rendered/plastered using the Salt Neutraliser additive to prevent
future salt activity in the new surfaces. Walls are only to be
rendered/plastered to the first course of bricks following a Damp
Proof Course. This is to prevent bridging. The walls are returned
back to their original condition and ready for painting.
 Failure
to comply using a Salt Neutraliser in the mix will certainly lead to
disastrous results and out of pocket expenses. The walls will again
blister and peel, and your new walls will need to be stripped off
again, replastered/rendered and painted. The cost of stripping of
hard render (new render) is much higher, not to mention the removal
of skirtings, achitraves and repainting. A simple step missed can
lead to the cost of that much deserved holiday.
So take care when deciding on who your plasterer will be. Are they
from a reputable Company, or a handyman not experienced in 'damp'
knowledge.
Damprid promises to have the job fully restored and back to painting
stage.
As we say " it's better to get the job
done properly, or not at all ".
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