How to Prepare Your Walls Before Painting in Extremely Dry Weather
Dry walls look immaculate and behave terribly. Here's the preparation that stops dusty, thirsty surfaces ruining an otherwise good repaint.
Dust and Chalk Are the Hidden Problem
Extremely dry weather leaves surfaces coated in fine dust, and old masonry and distemper-type finishes go chalky. Paint applied over either has almost nothing to grip.
Brush down thoroughly, then wipe with a damp cloth or sponge — enough to lift the residue without soaking the wall, which also keeps you within any hosepipe restrictions.
Rub a hand across the surface afterwards. If it comes away powdery, the wall needs stabilising rather than more washing.
Mist Coats and Stabilising Primers
Thirsty surfaces are the defining challenge of painting in a drought. Bare plaster, filler repairs and dried-out masonry pull moisture straight out of the first coat.
New plaster needs a properly diluted mist coat. Chalky or highly absorbent masonry needs a stabilising primer, and patch repairs need spot priming so they don't flash through the finish.
Get this stage right and the finish coats behave normally. Skip it and no amount of good paint will save the result.
Fill, Sand and Let the Heat Work For You
Dry weather opens up cracks and shrinkage gaps at joints. Use flexible filler and caulk so the repair moves with the wall instead of splitting again.
Fill in layers rather than one deep pass. The upside of hot conditions is that filler and caulk dry quickly, so preparation moves faster than usual.
Sand flush, dust off completely, then prime every repair before the first finish coat — the small step that separates a lasting job from a short-lived one.
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