Case Histories
Proven rainwater management solutions for building professionals
Wade Road Depot, MOT Centre Baskingstoke
ExpandAt the beginning of May, 2016, slightly more than 40 Metres of the UNIFOLD® gutter lining system was installed at the MOT Centre at the Wade Road Depot, in Basingstoke.
As there was only one run of gutter, this being a valley, the installation was straightforward for Blenheim Roofing Services due to the capabilities of the UNIFOLD® system
Arnold Clark Training Centre
ExpandOne run of the UNIFOLD® gutter lining system, totalling slightly more than 100 metres was installed early in 2015 at the Arnold Clark Training Centre on Bearing Drive in Wolverhampton.
After more than three years on site and numerous attempts at coatings, mainly at localised joint failures, the UNIFOLD® system was chosen to solve the problems that kept occurring.
The gutter contains 14 siphonic outlets, which the UNIFOLD® system easily accommodates, two of which were manufactured within the same section of gutter due to their close proximity to each other.
This project was installed by Centurion Roofing Services, Tamworth.
JCC Lighting
ExpandJCC Lighting in Bognor Regis suffered recurring gutter joint leaks within the last 20 metre run of the central valley of the roof.
Repairs had previously been carried out to the joints along with routine gutter cleaning, however seagulls would peck at any coatings or tapes used for repairs and as a consequence, the leaks would return after a while.
It was therefore decided to install approximately 20 metres of UNIFOLD® gutter lining, stopping just short of a sump outlet in the gutter to ensure it remained free flowing.
HM Land Registry, Coventry
ExpandMore than 150 metres of UNIFOLD® was installed at HM Land Registry, Coventry.
This installation utilised the UNIFOLD® patented clip-joint system designed to allow joints to be competently and successfully completed behind obstructions and where access is particularly difficult.
The existing gutter systems installed on the roof of the building were manufactured from GRP (Glass Reinforced Polyester).The GRP gutter joints had broken down due to thermal movement, for which this material is particularly prone.
In order to ensure the integrity of the lining, system expansion joints were strategically introduced to induce Unifold to move in complete unison with the gutters beneath.
This was the second HM Land Registry building to receive UNIFOLD®. The previous installation was in Leicester.
Federal Mogul, Slough
ExpandAmpteam were given the opportunity to inspect more than 1000 metres of UNIFOLD® which had been installed more than 15 years ago.
The gutters at Federal Mogul, Slough were being cleaned and certain areas were given special attention to ensure that the surface of the gutters could be inspected. There was no deterioration to the surface of the gutters, or its component parts and this gives every indication that the projected lifespan of UNIFOLD®, above 35 years, can be confidently expected.
Following installation, UNIFOLD® cured all the existing gutter leaks and the building has since remained water-tight.
Once sealed, the system will not develop a leak due to the double-sealed joint technology and the cold vulcanisation of the joints.
BEW Electrical Distributors
ExpandIn February 2016, 50M of the UNIFOLD® Gutter Lining system was installed for BEW Electrical Distributors in Orpington.
BEW are a rapidly expanding chain of electrical wholesales currently with 19 branches nationwide, and only recently moved to their Orpington depot having previously traded from three much smaller units on the same business park.
The new unit was plagued with numerous small leaks through an existing asbestos cement roof, the roof lights and steel gutters and BEW requested that Blenheim Roofing Services quote for lining the gutters, as well as for over-sheeting the roof.
The installation of the UNIFOLD® Gutter Lining system was the second at a BEW depot, the first one completed five years ago, and the project was completed quickly and with no issues at all.
Mulberry School
ExpandIn Early August, as part of a project that also consisted of the resealing of capping joints and the repairs to the splits in the roof sheets, Ampteam were asked to provide the Unifold gutter lining system for at Mulberry School for Girls in the Shadwell ward of the East End of London.
More than 170 metres of the UNIFOLD® Gutter Lining system was installed, over two runs of gutter, to solve the problem of joints leaks throughout the gutter runs.
10 outlets were installed within each of the runs of gutter and Expansion joints were also included within the installation, due to thermal movement problems within the existing gutter conditions.
The UNIFOLD® gutter lining system was installed by Riteshield Roofing, Hitchin (01462 417233) who installed the system to a high standard.
Callaway Golf
ExpandOver 60 metres of UNIFOLD® was installed during the spring of 2015 at Callaway Golf in Chessington.
This particular project contained various items of unique fabrication comprising factory fabricated step sections and factory fabricated step up stopends, both of which were manufactured in two parts.
There were two of the step up stopends and five of the step sections within the gutter profile, along with 8 outlets, six of which were coned.
This installation was completed by Blenheim Roofing of Epsom, Surrey.
Stratford Tools, Buckingham
ExpandThese photographs show a UNIFOLD® installation to Stratford Tools.
The building had been plagued by persistent leaks and although several alternative treatments to the gutters had been considered, UNIFOLD® was chosen due to its guarantee and projected longevity.
More than 350 metres of UNIFOLD® was installed including corners and tees as the roof was of hipped construction.
Post Office, Oxford
ExpandThe above photographs depict the UNIFOLD® installation to the Post Office distribution centre, Oxford.
More than 700 metres was installed on two buildings both of which had corners and the larger of the two buildings also had tees and factory fabricated sloping cascade sections which discharged the valley gutter to the boundary wall gutters which were at a lower level.
This installation has been one of 12 Post Office properties to receive the UNIFOLD® treatment over a period of two years.
The Swansea distribution centre is another notable installation as this was part of a major roof refurbishment programme designed to conform to current Document L2 regulations.
Argos Distribution Facility, Castlegate, Wolverhampton
ExpandThe UNIFOLD® Gutter Lining System has recently been installed within five valley gutters, totalling more than 700metres, on the Argos Distribution Centre, Castlegate, Wolverhampton.
The facility, operated on behalf of Argos by Wincanton, had experienced severe storm water ingress due to the overwhelming of the existing gutters and outlets, causing severe damage and disruption.
The roof had been over-sheeted several years ago and the existing gutters were fitted with a continuous plastics liner at this time.
This liner was not lying flat due to expansion and contraction problems, leaving raised areas within the gutter, further reducing the available capacity and contributing to the problems being experienced.
Ampteam Limited along with rainwater drainage experts CRM Rainwater Drainage were invited to propose a solution to the problem.
Survey and Design
Following a survey by Ampteam and CRM, a design solution was provided for the gutters.
As the existing gutter had insufficient capacity and any modification to the roof at the eaves position to enlarge the gutter was not an option, the design solution required the use of all of the available space within the eaves cavity.
The situation was complicated by the need to control works on the asbestos cement gutters on a building constantly in use. This in turn meant that no extra outlets could be introduced and the existing outlets could not be enlarged.
The solution involved the installation of a multi-hinged Unifold gutter, fitted and sealed to the underside of the roof sheet in order to maximise the gutter capacity, combined with specially designed siphonic outlets.
As the eaves conditions varied along the gutter runs and within each gutter and access was tight, the UNIFOLD® was supplied with 7no hinges.
This facilitated relatively easy installation in very difficult circumstances.
Siphonic Outlets
The UNIFOLD® gutter was also provided with factory fabricated side boxes to house the unique siphonic outlets that were designed and tested by Dr Malcolm Wearing of CRM Rainwater Drainage.
Although the capacity of the gutters had been increased to the maximum given the existing roof conditions, these siphonic outlets, manufactured and installed by Aquaphonixs Limited, were essential to improve the drainage performance of the existing outlets and to allow the system to function without any additional outlets.
Fan shaped, semi-circular siphonic outlets with an offset 100mm diameter tailpipe were specially designed to fit inside the UNIFOLD® side boxes and into the existing 150mm diameter outlets.
The siphonic outlet tailpipes were connected to flexible tubes, sleeved into the existing plastic downpipes.
The custom made outlets were optimised and tested in laboratory conditions and proved to provide a capacity of over 27litres/second, ten times the capacity of a standard 100mm diameter outlet.
Calculations to prove the design solutions of both Unifold gutters and siphonic outlets were provided by CRM Rainwater Drainage.
Installation
The UNIFOLD® gutter system was installed by approved contractors Traditional Structures Limited who, due to the relative complexity of the contract, originally forecast a period of 7 weeks to complete the installation.
First class organisation, excellent site personnel and attention to detail by both Traditional Structures and Ampteam Limited meant that the installation was completed in just over 4 weeks with no disruption to processes within the building.
Refurbishment of Arriva Bus Depots
ExpandUnifold Gutter Lining System Chosen by Arriva Plc for the Refurbishment of Bus Depots
ARRIVA a multinational public transport company chose the Unifold gutter lining system as the preferred system for the refurbishment of their bus depots at Thornton Heath, Clapton and Croydon.
All of the projects were completed by our approved contactors Blenheim Roofing based in Epsom, Surrey
Greenford Park
ExpandOver 500 Metres of the UNIFOLD® gutter lining system was installed during July and August of 2015 at Unit 1, Greenford Park, Ockham Drive, Greenford.
Used as a method of prevention, more than to solve any existing problems, the project contained a dozen siphonic outlet sections, which also contained overflows, along with corners, snorkel overflows, a fabricated stopend, tee section and 21 tapered outlets.
The installation was carried out by J.A Philips Associates, Barking, who have carried out a large number of UNIFOLD® installations.
Alligator Self Storage - Winchester
Expand2 runs of UNIFOLD®, totalling 117 metres, was installed during October 2015 at the Alligator Self Storage facility in Winchester.
Each run consisted of two stopends, slot weir overflows, and sole outlets with a new weir overflow also being installed centrally with each run.
Ampteam have since received a message from the installing contractor voicing their pleasure with not only the system but also the surveying aspect that Ampteam offer, saying that the system was "spot on, fitted like a glove".
Progress House, Coventry
ExpandDuring the last few months of 2014 around 450M of the UNIFOLD® Gutter Lining system, including Corners, snorkel overflows and outlets, was installed for Cambridge Assessment at Progress House, Coventry.
The existing gutter not only had leaks but, following calculations, did not have a capacity sufficient enough for the 'perfect storm'.
The installation of UNIFOLD® enabled the legs of the gutters to be raised, making the gutter deeper, and increasing capacity, without any additional support required to the system.
The UNIFOLD® gutter lining system was installed by MITIE Tilley Roofing, Stevenage (01438 355563), who have since informed us of the clients satisfaction and delight of the outcome.
Corus at Grantham
ExpandCorus, formally British Steel Corporation, have received the UNIFOLD® treatment many times.
Since the first installation some 14 years ago, Corus buildings countrywide have had UNIFOLD® installed, many of which have been over 500 metres.
The above photographs show the before and after treatment of the Corus distribution depot at Grantham where more than 550 metres was installed.
Electra Park, Birmingham
ExpandAs part of a major roof refurbishment programme at Units 1-6, Electra Park, Electric Avenue, Birmingham, some 700 metres of UNIFOLD® Gutter Lining System has been installed to valley and parapet gutters serving the building.
All six adjoining units are served by individual hipped roofs discharging to valley gutters and these are joined by tee sections into a parapet gutter installed around the entire periphery of the building.
The valley gutters are some 80mm higher than the parapet gutters and to discharge to the lower gutter the tee sections are fitted with sloping ends.
The Unifold installation has replicated the existing system with consummate ease, including all corners and tees.
One particular tee and combined obtuse corner was particularly complex and included many facets and angles but the lining system proved more than adequate for this item providing a simplified and more efficient component
MG Rover, Longbridge
ExpandBefore the unfortunate demise of MG Rover, there were several installations of UNIFOLD® above sensitive production areas.
The photographs to the left show before and after treatments.
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“I have known and worked with Ampteam for a long time and really like not only the quality of Unifold but also the service that they offer. They are always friendly and reliable and should any issues ever arise they are always resolved quickly.”
Richard Pawlowski - Senior Surveyor / Estimator - Riteshield Roofing
“ I have been actively involved in a wide number of projects since 2003 installing Unifold gutter lining systems for many Clients . In that time , thousands of metres have been successfully fitted to a wide range of Industrial and commercial buildings including Schools ; all to the complete satisfaction of the Building Owners . Unifold, unlike some inferior flexible linings in the market is a bespoke designed system . For this reason, amongst others , I believe it to be far superior in offering the Clients both value and also long term performance and integrity."
Andy Green - F.I.o.R