Bauder Overlay Waterproofing | Live Project

ClientMajor social housing landlord

SystemBauder Total Roof System — two-layer self-adhered overlay

ScopeMain Roof and Roof 2, flat roof waterproofing

StatusLive — works in progress

The Approach

The existing felt waterproofing on the two flat roof areas had reached the end of its serviceable life. Rather than a full strip and structural rebuild, the roofs were assessed as suitable for a Bauder overlay — the new system installed over the prepared existing deck, following surface preparation and localised remedial works.

Doing this while scaffold and access were already in place kept disruption to residents and cost to the client both down.

The System

Cap Sheet

Bauder K5K capping sheet — elastomeric bitumen with a 250g/m² spunbond polyester reinforcement.

Underlayer

BauderTEC KSA DUO — self-adhesive elastomeric bituminous membrane with glass lattice reinforcement and DUO lap technology.

Flame-Free Detailing

The system allows flame-free detailing for application near combustible construction materials — a key safety consideration on occupied residential roofs.

Installed as a two-layer, self-adhered system to both the Main Roof and Roof 2, backed by the Bauder system guarantee.

Scope of Works

Review of the Bauder specification, survey report and site photographs prior to works.
Surface preparation of the existing waterproofing to receive the overlay.
Localised remedial works to the existing deck and detailing.
Installation of the BauderTEC KSA DUO self-adhesive underlayer.
Installation of the Bauder K5K capping sheet.
Detailing to upstands, parapets, outlets and penetrations.
Works undertaken from existing scaffold and access with the building occupied.

On Site

Pre-Works Condition

Main flat roof area prior to overlay works — 01 Main roof — existing felt waterproofing at the end of its serviceable life, assessed for overlay.

Roof plant and detailing prior to works — 02 Existing plant, outlets and detailing to be worked around and re-dressed into the new system.

Parapet and upstand detail before works — 03 Parapet and upstand condition — the details that determine whether a flat roof lasts.

Roof area with scaffold and access in place — 04 Scaffold and access already in place — the overlay approach makes best use of it.

Completed installation photography to follow on handover.

Bauder Total Roof System — Overlay Waterproofing