Stripping back to the rafters and rebuilding with new membrane and treated battens.
Under the tiles sit the two layers that actually keep a roof working. The membrane sheds anything that gets past the covering, and the battens hold every tile on the roof.
When either has gone, retiling over the top only hides it. Stripping back and refelting is more work up front and it is the difference between a roof that lasts and one that comes back.
What the job involves
Existing covering stripped and the rafters inspected
New breathable membrane laid and lapped correctly
New treated battens at the right gauge for the covering
Stainless fixings on exposed coastal roofs
Eaves, valleys and abutments detailed as the roof goes back on
Ventilation checked so the roof space can breathe
Included in this service
New felt and batten
Two roofs, half an hour apart, two specifications
Sheltered, inland Ashford
Galvanised fixings
Perfectly sound here, and cheaper. Spending more would be spending for the sake of it.
Exposed, Lydd and Dymchurch
Stainless fixings
Quoted as standard rather than as an upgrade, because the cheaper option does not survive out here.
Salt off the Channel corrodes ferrous metal far faster than ordinary damp air. We have taken tiles off roofs on the coast after nothing more than a breezy week, purely because the nails holding them had rusted through. That is a specification failure, not a tile failure.
If a roofer quotes the same specification for a Lydd bungalow as for a sheltered terrace in town, they either do not know the difference or have not priced for it.