Chapter 1: Can the clay plain tiles on our Selborne cottage be matched when some slip or crack?
What we find
Plain clay tiles are small, about the size of a hand and a half, and each course overlaps the one below twice, which gives the roof its soft, uneven texture. They were once pegged or nailed to timber battens, the laths that run across the rafters. Over a century or more the nails rust, the pegs rot, and the clay itself suffers: frost gets into the softer tiles and flakes the face off, and individual tiles slip out of line.
You will see this as a ragged patch where tiles have dropped, darker marks where moss has held water against flaking faces, or a dip in the line of the roof. Look inside the loft for chinks of daylight and for tiles lying on the insulation. On a house with Malmstone walls and a clay roof, the colour range of the old tiles is part of how it looks from the lane.
What we fix
Only the failed area comes off. Every tile that is still sound stays, and we fill the gaps with reclaimed tiles chosen for colour and camber, or handmade new ones if reclaimed stock does not match. New battens go under the stripped area, and the tiles go back on stainless or copper nails or clips, not on corroded ones. Our page on nail sickness explains why old fixings fail.
Because Selborne is a conservation area inside a National Park, we photograph the roof before and after, and the survey report can go to the conservation officer if you want consent confirmed. Typical UK prices reported for re-roofing a semi in concrete tile run from £6,500 to £10,500; clay costs more. Your fixed quote follows the survey.