Rendering & Plastering

Specialists in the after effects of damp problems.Damaged plaster is stripped off

Plaster or render that has been wet or damaged due to a damp problem will remain to have salt activity present even after the immediate problem has been remedied. These salts in the render, plaster and masonry are hygroscopic compounds which attract water from the air drawing moisture into the walls plaster and brickwork. A completely looking 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 or render has been removed.

DampShield remedies the problem of salts breaking back out in plastered or rendered walls by using a Salt Neutraliser or Salt Retardent 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/Retardent 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 of the damp Wall finished back to skirting stage.
proof course. The walls are returned back to their original condition and
ready for painting.

Failure to comply using a 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 (which is the new render) is much higher, not to mention the removal of skirtings, achitraves and repainting. A simple step missed can lead to disastrous results and out of pocket expenses.

The top photo illustrates the damaged render/plaster stripped off the wall normally 300mm above the visually damaged render/plaster.
The photo below shows the finished wall ready for painting and the skirting to be put back.