Chapter one
Flint and brick houses with old chimney-shafts
Where a village is built of flint and brick, the roofing risk gathers at the masonry: stacks, gable walls and the lead that seals them.
The Victoria County History, published in 1953, describes a Stoughton of flint and brick, with no building earlier than the 18th century apart from an L-shaped house of red and black brick that keeps its 17th-century chimney-shafts. A village like that has roofs starting and stopping against masonry in a dozen places: at gable walls, around stacks, beside porches and lean-tos added in later decades. Every one of those stops is a joint, and joints are where leaks begin. A roof that looks tidy from the lane can still be admitting water through one of them.
At a glance
- The History describes a village of flint and brick
- One L-shaped house keeps 17th-century chimney-shafts
- Stacks and gable walls are checked first
1.1 Stacks and the lead around them
A chimney shaft rises through the roof and takes weather on all four faces. Its mortar joints open, brick faces flake, and the flaunching, a sloped collar of mortar around the pot bases that sheds rain, cracks and lets water in. Lower down, the stack meets the roof through a tray of lead at the back, flashings up each side and soakers, the small lead sheets threaded between tiles along the edge. We trace a stain upwards from the loft to the brickwork above it. A stack that is leaning or badly eroded matters more than a damp patch, because repointing costs little and rebuilding costs a good deal more. Our chimney repairs page covers how each choice is made. Taking out a chimney breast indoors needs Building Regulations approval every time, and a party wall notice too if it shares a wall with next door.
1.2 Verges and ridges on brick gables
A gable wall of brick or flint ends the roof at a verge, where tiles overhang the wall or sit tight to it. Wind lifts that edge before any other, so the question is how the tiles are held down. BS 5534 has treated ridge and hip tiles as needing mechanical fixings, not mortar alone, since its 2014 revision. Old bedding that has gone soft is replaced or supported with fixings, which beats adding a thick new layer of mortar over it. Sound ridge tiles are cleaned and set back, so you pay for new ones only where the old are cracked.
The survey set that comes with the quote shows every finding on your own roof.
Checking a village chimney stack
- Brickwork We look for open joints, flaking faces and any lean in the shaft.
- Cap and pots Cracked flaunching is raked out and renewed, and loose pots refixed.
- Lead Back tray, side flashings and soakers are tested for lift and splits.
- Loft below Damp on the timbers around the breast shows whether water has been entering.






