Porto · Basement Tanking

Basement tanking for Porto wine cellars and vaulted storage

Many Porto properties have barrel-vault cellars converted to habitable use without adequate waterproofing. Negative-side slurry tanking addresses lateral Douro pressure where injection alone fails.

Cross-section diagram of DPC injection in granite masonry — Granite vaults in central Porto require flexible tanking systems — rigid membranes crack at springing points. We specify cementitious slurries rated to BS 8102 Type A.

Local masonry challenge in Porto

Ribeira and Miragaia cellars sit below the water table for months each winter. Owners who inject walls without addressing floor-to-wall joints see rework within two seasons.

Landmarks and neighbourhoods we cover

Douro riverfront warehouses, São Bento station granite blocks, Clérigos tower vicinity

Ribeira wine lodges
Miragaia vaulted cellars
Campanhã hillside basements

What we deliver on site

Hydrostatic pressure assessment
Substrate preparation — raking out failed bitumen or cement
Cementitious slurry (2–3 coats) or membrane specification
Cavity drain membrane where continuous positive-side access exists
Sump and pump sizing for habitable conversions

Typical timeline: Tanking programme: 2–4 weeks depending on vault geometry and cure times.

Local FAQ

Internal slurry systems are reversible — we document all interventions for future conservation audits.

We assess lateral moisture from adjacent wine cellars separately from groundwater rise.

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