
CH60
Welsh slate reroof, 1930s semi in Heswall
The original concrete tile on this Heswall semi had reached end-of-life after 70 years on the roof. The owner had been patching slipped tiles for three winters and the underlay had split in two valleys. We surveyed the deck before quoting and confirmed the rafters and battens were still in good condition, which let us run a like-for-like Welsh slate reroof without structural rebuild. Penrhyn slate set on stainless nails over Tyvek Pro underlay. Marley Duo Edge mechanically fixed dry-ridge to BS 5534, replacing the original mortar-bedded ridge that had failed first. Code 4 lead flashing renewed at the chimney and at the front bay. Soffit and fascia were inspected and held up well so we left them in place. The job ran six working days from scaffold up to scaffold down, with the strip taking a day and the slating five. Owner kept the existing rear extension flat roof which we will recover separately on a future visit if she wants to.
- Scaffold
- Two-tier external scaffold with roof-edge protection
- Duration
- 6 working days, 2 senior roofers plus 1 apprentice
- Materials
- Welsh slate (Penrhyn quarry, Bethesda), Marley Duo Edge dry-ridge system, Code 4 lead flashing (chimney and bay), Tyvek Pro breathable underlay, Stainless steel slate nails













