
Chapter one
Re-fixing hips and ridges on interwar bungalows
The bungalows and semis that joined North and South Lancing between the wars now carry ridges close to their hundredth winter.
A hipped bungalow roof has four slopes, with a hip, the angled ridge formed where two slopes join, at each corner. That gives it far more ridge-line than a plain gable, and every metre of it is bedded tiles that wind and rain can work loose. The North Lancing appraisal ties the town's growth to the railway carriage works, which opened in 1912, with house building running on fast through the interwar years. Before the 2014 revision of BS 5534, ridges and hips were commonly accepted with mortar bedding alone, so roofs of that age were laid with nothing else holding the top course, and nearly a hundred years of sun, frost and salt air have been at that mortar since.
At a glance
- Ridge and hip mortar loosens before the tiles do
- BS 5534 now expects mechanical fixing as well
- Dry-fix systems are tested to BS 8612:2018

1.1 What we check first
From a ladder and from the ground we look for ridge or hip tiles that have lifted, mortar joints that have cracked or dropped out, and loose tiles along the verge, where the slopes stop at a gable wall. Inside the loft, daylight showing at the ridge or damp staining on the rafters tells us where water has been getting through. On a hipped roof the hip irons at the eaves, the curled metal straps that stop the bottom hip tile sliding, are worth a look too, since they rust. Every fault goes into the photographs we send with the quote, so you see it on your own roof, not on a stock picture.

1.2 How the repair is fixed now
The 2014 revision of BS 5534 changed that. A bedded ridge or hip tile now needs a mechanical fixing too, a screw or clip into the timber beneath, because the standard no longer trusts mortar to hold it on its own. Mortar is not banned and can still be used alongside those fixings. The other route is a dry-fix ridge, which sits on a ventilated roll held by clips with no mortar bed; BS 8612:2018 is the test specification for those systems. Where the original ridge tiles are sound, we clean them, re-bed them and fix them back rather than buying new. Where the tiles themselves have cracked, our ridge tile repairs page sets out the choices.
Fixing standards for a Lancing ridge
- Code of practice
- BS 5534:2014+A2:2018
- Dry-fix systems for ridge and hip
- BS 8612:2018
- Single-lap tiles
- Wienerberger: one mechanical fixing per tile as a minimum
- Pitch under 30 degrees
- Marley: the windward slope can suffer strong suction
- Roofs near an airport
- Ask the tile maker for fixing advice (Marley)
Source: BSI; Marley; Wienerberger, fetched October 2026





