Makers Office Building 4,Shenstone Business ParkLynn Lane, Shenstone, WS14 0SB

T : 08458 994444F : 01543 480676E : enquiries@makers.bizW : www.makers.biz

Registered in England No: 6348341 Registered Office as above

Overcoating TarmacadamWaterproof Solution

STRUCTURES CASE STUDY

PROJECT

CLIENT

STRUCTURE

CONTRACT VALUE

CONTRACT

111 Piccadilly, Manchester

Single Parking Deck

Bruntwood

£87,000

Formerly known as Rodwell Tower, 111 Piccadilly is an 18-storey office building adjacent to Manchester’s Piccadilly train station, constructed in 1965. At 64 metres high, it’s Manchester’s 16th joint tallest building.

Designed by Douglas Stephen & Partners back in the 1960’s, the building straddles the Rochdale Canal supported on 8 massive reinforced concrete columns. At the rear of the office building is an open surface car park which comprises a single, flat-slab reinforced concrete deck – also supported by a series of concrete columns – straddling the canal and tow-paths beneath it.

As part of Bruntwood's planned maintenance programme, their in-house Building Management Team noticed surface defects had started to develop in the macadam wearing surface. With a desire to improve the aesthetic appearance and tackle the water proofing issue, Makers were employed to provide the solution.

Usually the failing systems are removed but Makers design team established that the Triflex Deckfloor R System could provide the solution.

Before

Before

Makers Office Building 4,Shenstone Business ParkLynn Lane, Shenstone, WS14 0SB

T : 08458 994444F : 01543 480676E : sales@makers.bizW : www.makers.biz

Registered in England No: 6348341 Registered Office as above

Overcoating TarmacadamWaterproofing Solution

CASE STUDY

New DSM JointDeck over canalFailed Joint

Pedestrian walkwaysFinished DeckFinished Deck

Being an ‘open air’ car park and therefore constantly exposed to the extremes of the British weather, it was vital to protect the existing macadam-based surface of the car park to the rear of 111 Piccadilly. The surface had been laid a number of years ago on top of the reinforced concrete deck substrate below however following inspection in April 2015, it was apparent that the existing waterproofing measures were failing and allowing water to get through into the concrete deck.

The traditional re-waterproofing approach for this type of macadam-based surface would have meant the com-plete removal of both the macadam material and the existing waterproof membrane underneath it. To have done so would have caused considerable disruption and expense so the optimum solution was to apply a waterproof wearing surface over the top of the existing. Triflex’s Deckfloor R system was identified as the correct solution given its successful track record in this type of application.

With the original bay layout at 90o, users found it difficult to get into spaces easily. Makers recommended that the circulation and flow could be improved by adjusting the angle of the central parking bays to approximately 75o.

Following test cores to assess moisture content, the deck surface was prepared by planing, double-primed and the Deckfloor R system applied in contrasting colours, including demarcation of pedestrian safety walkways. The main movement joint between the car park and the office building also required replacement as it had been leaking badly for a number of years.