The following Trade Specifications must be read in conjunction with all other Contract documentation including; Tender Letter, General Terms, Conditions of Contract for Works, Labour Only and Purchase Orders, General Construction Notes (England & Wales), Suppliers and Sub Contract Works - Customer Charter and the Company's Occupational Safety, Health & Environmental Management System.
Our aim is to enable our sub-contractors and suppliers to access key Commercial information such as Terms & Conditions, Trade Specification, etc. online as soon as they are updated and revised. We hope that this will ensure that our supply chain is always fully informed as quickly as possible.
Whilst available online, this information is also available from the Commercial Departments at our Divisional offices and will form part of any contract we place (as set out in the Order).
Please be aware that bogus web sites seeking fees for the chance of working with major contractors exist.
Senior Group Commercial Manager
Revision AK 20.09.2019
Section 5.14 Broadband - Cat module and wiring changed to CAT6.
Section 15.8 Condensation Traps – Revised to include connection with the trap and drain fitted to the extraction fan.
Section 21.3 Fire Protection - Electrical sockets for Built in Ovens and Integrated Dishwashers must be installed in accordance with standard details.
Section 24.4 Television – Connection of Sky and Virgin Media Plates. Refer to the latest requirements detailed in the Sky and Virgin
Section 27 Schedule of Materials – Door Entry Systems schedule updated in accordance with Comelit specification update. Deta Carbon Dioxide detectors reference has changed from 1141 to 1142.
Revision AJ 01.01.2019
This document has been subject to review due to the new I.E.T regulations 18th edition, which will be subject to for any new electrical installations designed (tendered) from the 1st of January 2019.
Removal of equipotential bonding requirements.
Group Supplier information has been updated for Door Entry Systems.
Material Schedules have been updated with revised product codes for Hagar consumer units. The Contractor to assess whether surge protection is required based on the plot's location in the country (using a lightning strike rate map) plus a rural and suburban / urban factor in accordance with I.E.T. regulations 18th edition.
Removal of door chimes / bells to all ranges from the material schedule.
Addition of Deta carbon dioxide detectors (Scotland only)
Revision AI 01.07.2018
Fire protection within the specification has been reviewed.
Section 20 has been newly added.
An update of smoke alarm product reference numbers have been amended.
Revision AH 01.01.2018
15.3 Rewording - Kitchen (Where no hood extract)
Fans in this location must be capable of giving extraction at a rate not less than 60 litres/second extraction, ducted to outside through sleeve, duct should be built in brickwork as work proceeds or 30l/s if the fan is placed over the hob.
15.4 Addition - Were the fan is ducted to a roof tile vent the EnviroVent condensation kit must be used, flexible ducting to be pulled taught and to be kept to a minimum as per the domestic ventilation compliance guide.
15.5 Addition - Were a utility fan is ducted to a roof tile vent the EnviroVent condensation kit must be used, flexible ducting to be pulled taught and to be kept to a minimum as per the domestic ventilation compliance guide.
15.8 New - All of the above equipment to be manufactured by Envirovent.
Schedule of materials updated accordingly 3 revised product numbers.
Revision AG 01.07.2017
Changes to product codes/names have changed.
Barratt / David Wilson Homes Standard Drawing DB-SD09-003