Chapter one
Flashings and stacks on Arundel's brick terraces
Red brick houses from the late 18th and early 19th centuries carry chimneys, shared walls and gutters, and the weather finds the joints between them.
A roof on a brick house in Arundel is seldom a plain rectangle of tiles. The Victoria County History describes large red brick houses from the late 18th and early 19th centuries, and the hill makes rooflines step, so slopes break at chimney stacks, party walls and valleys. Each of those junctions is kept dry by a flashing, lead folded from the roof surface up into the brickwork, or by a valley, the trough where two slopes meet. Brick and lead move differently with the seasons, so the joint between them is where wear shows first. That is where we begin when a customer tells us about a damp patch. Where a roof abuts one of the flint walls found on the older cottages, the lead has to be tucked into a joint cut in an uneven face, and we check each run for gaps.
At a glance
- Water often enters where roof meets chimney or wall
- Taking out an Arundel chimney breast always needs Building Regulations approval
- Scaffold on a public street needs a county licence

1.1 Tracing a stain back to the junction
A brown mark on a first-floor ceiling is seldom directly under the fault. Water runs along a rafter, or across the sheet laid beneath the tiles, before it drips, so we trace it uphill: the flashing, the mortar joint it sits in, the valley, then the gutter. In the loft we look for dark timber and daylight around the stack. A flashing lifted from a brick joint can often be re-dressed or renewed without disturbing the covering around it, and our lead roofing page explains lead codes and dressing. Every fault is photographed, so the written quote follows what you can see for yourself.

1.2 Chimneys and shared walls
Old brick stacks lose mortar to the weather, and a stack that leans or sheds bricks needs mending before any roofing starts. If you are thinking of taking a chimney breast out, the Planning Portal says Building Regulations approval always applies, and for a chimney on a party wall, the wall you share with a neighbour, GOV.UK asks for notice 2 months to a year before work starts. Our chimney repairs page covers repointing, flaunching (the mortar bed around the pots) and rebuilds.
1.3 Getting scaffold onto a steep street
High Street climbs steeply, and many Arundel houses front the road. If the poles go up on the footway or the carriageway, the scaffold contractor asks West Sussex County Council for a Highways Act licence, and the council wants 10 working days' notice at least. We build that wait into the programme, because it often decides the start date more than the roof does.
Tracing a leak at a chimney stack
- Loft first We look inside for staining, damp timber and daylight around the stack.
- Outside next From ladder and ground we check the flashing, the stack's joints and the gutter below.
- Photograph Each fault is photographed before any quote is written.
- Smallest fix We recommend the smallest job that closes the entry, often a re-dressed flashing.






