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- 14 Jan 2009
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Our house is made of soft old bricks which do take in water and blow,due to the age of the house we have no foundations; the house is build on chalk with a slate damp course. The previous owner pebbledashed the building which we have taken off and intend to re-render to the old slate damp course with a smooth finish. I have a small amount of damp on one wall ie inside of the wall we are intending to render. Previously on the outside of this wall (where the damp is showing inside) the earth was piled above the damp course which we have dug out and this may have been the cause of the damp inside. However I have a conundrum I want to protect the soft bricks below the damp course from blowing but understand that rendering below the damp course is unwise as it may allow damp to progress up the building. One suggestion is to paint below the damp course with something like 'Black Jack' twice, on the second coat put sand on it for good adhesion then leave a 5mm gaps below the damp course (to stop damp) and render the brick below the damp course. What do people think? Any other ideas? Anyone know the rate for rendering currently including the cost of guys who knock up the cement or anyone good with fair rates?