West St. MSCP, Leighton Buzzard, UK
Desceal stands the test of time 27 years later!
A busy town centre multi-storey car park (MSCP) in Leighton Buzzard is still benefitting from long-term protection, 27 years after the initial application of the Decseal waterproofing and wearing course system. Originally installed in 1989 with some replacement markings in 2003, the system, on inspection, was found to still be well bonded and continuing to perform well in October 2015 when Bedfordshire County Council’s Term Contrators Amey returned to carry out further maintenance.
Due to the way Decseal was still performing by protecting the parking decks from water ingress and corrosion, the refurbishment work to the waterproofing and surfacing systems only required the skid and slip resistance to be enhanced by the application of Decseal Wearing Course to the driving aisles on each of the three levels, where some wear had occurred over 27 years of use.
Bedfordshire County Council
Amey - Bedfordshire Highways
Stirling Lloyd Construction Limited
- West St Car Park, Leighton Buzzard
The car park, which provides 280 spaces, was constructed in the 1970s using the British Lift Slab (BLS) method. A partial collapse in 1997 of the Pipers Row Car Park in Wolverhampton built using a similar technique had proven this design’s potential for punching shear failure, and the importance that a protective coating plays.
After rigorous testing, the West Street car park was found to be in good condition, with only a few isolated areas requiring minor repair.
Core tests undertaken by the client had shown there to be minimal chlorides in the concrete but the refurbishment work was needed to maintain the structural protection in the years to come, as well as a safe slip resistant finish. Furthermore, refurbishment work was required to replace defective drainage channels and install a new vehicle restraint system.
Amey - Bedfordshire Highways decided to apply Stirling Lloyd’s Decseal Fully Reinforced Deck Coating System to two major construction joints connecting the two exposed roof levels on the third roof level, providing enhanced durability and long-term crack bridging performance.
The Decseal Wearing Course system was specified to all driving aisles, overlaying the existing Decseal wearing course.
The Decseal system was chosen in part due to the fact that it is able to be overcoated any number of times and after any length of time, thus avoiding the need to remove the existing coating, in this case, after 27 years.
Thanks to this overcoating ability the cost and duration of the refurbishment work was significantly reduced, as the existing Decseal layers did not need to be replaced. As a result, the disruption caused to users and loss of spaces was also reduced, and the minimal drive-on times achieved with the new finishes allowed car park spaces to be returned quickly to service, with less revenue lost for the client.
The specification of the Decseal repair option also appealed to the client as less dust and noise would be created to impact local residents. As well as the environmental benefits, there would be reduced manufacture, transportation and disposal costs on the project.
Jim Meagher, managing director of the Authorised Contractor engaged to do the work, Stirling Lloyd Construction Limited, commented: “The ability of the Decseal system to be installed in the winter period into October, allowed programme certainty, works commenced in a phased manner at night allowing the Car Park to remain open to the public.
The project was completed ahead of schedule ensuring plenty of time was saved to allow for the increased demand on the car park for shoppers in the run up to Christmas.”
Stirling Lloyd’s Decseal car park deck coatings have been performing exceptionally well on this Leighton Buzzard car park since 1989, and continue to provide long-term protection 27 years later.
The proof that the system can be overlaid repeatedly after such a significant amount of time demonstrates why Decseal is the system of choice for car park clients looking to save money, avoid disruption and increase their car parks service life to over 50 years.