Waterproofing
of basement and under pavement vaults of public house in Gerard Street,
London W1
by Renderseal
48 Gerrard Street
London W1 has been a public house (for many years) at the end of
Chinatown.
In July 2004 the public house was closed and
planning applied for by the owners, Shaftesbury Plc, to carry out a total
internal upgrade and refurbishment. Once planning was granted a new
public house licence was issued for the proposed incoming tenants.
In September 2004
Roots Contractors of Ewell in Surrey commenced on site and awarded
Renderseal Ltd the contract for waterproofing the basement walls and
large under-pavement vaults.
Due to the
masonry within the vaulted areas being in a fragile condition, it was
considered not to prepare/key the brickwork by means of bush hammering.
Instead it was proposed to apply a wire mesh reinforcement to the masonry
and then overcoat with approximately 40mm thickness of Gunite sprayed
concrete left to a keyed finish.
Sikadur combiflex waterproof
expansion/movement jointing was applied to the wall/floor junctions and
all exposed construction joints together with Sika 1 pre batched
waterproof rendering applied to all walls and vaults left to a wood
float finish.
Upon completion
of the above works Renderseal's 10 year insurance backed guarantee was
issued to Shaftesbury Plc.
This case
study has been submitted by a member and the British Structural
Waterproofing Association accepts no responsibility for its content.
