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Trade Specifications

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.

Jon Hayward
Senior Group Commercial Manager


Revision T 01.07.2018

General update to the Health & Safety section and inclusion of swift brick installation instructions.

Revision S 01.01.2018

We have now incorporated additional wording with regards to cast stone & pre-cast concrete floors.

Revision R 01.07.2017

Formatting changes only

Revision Q 01.07.2016

The trade specification has been updated in the following sections:

Section 6.3 has been amended to include 2013 Building Regulations.

A new subsection has been added within Health & Safety, 25.1 notes, "It is the Contractors responsibility to ensure that, whilst cutting bricks and blocks, his workforce and other workers in the vicinity of the brick cutting area are not exposed to silica dust arising from the cutting process. Where grinding tools are used in the cutting process, all operatives must wear a FFP3 disposable mask or half face respirator with at P3 filter. Additionally, all operatives must be face fit tested and records made available to site management."

Tags: Brickwork


Revision V - 01.07.2018

No major changes very minor formatting and wording within main roof section.

Revision U -01.01.2018

19.8 has been update by the SHE managers and an updated hyperlink replaced.

Revision T - 01.07.2017

Added note 4.5 any slight gaps around fire doors should be filled with a mineral wool or intumescent mastic & 20.2 Special attention must be drawn to fire doors in protected stairwells, which require all gaps to the frame to be filled with a mineral wool or intumescent mastic.

Revision S - 01.07.2016

Minor amendments have been made to the reference to CSCS cards within the Health & Safety section.

Within the Subcontractor section, a new requirement has been added, "The Carpentry Contractor is to provide timber support fillets in preparation for the Roof Tiling Contractor to supply and install eaves support trays."

"Tilting fillets" have also been to the inclusions list within the Quotation section under the Main Roof subsection.

Within Section 8, First Fix, 8.5 has been updated for stud partitions walls formed using 65x38mm softwood studs. Where 600mm studs are specified, "…with mid-supporting rail." has been added. Additionally, "Partition walls, formed around wet-rooms, are to be constructed using 65x38mm softwood at 400mm centres without mid-supporting rail."

A new subsection 10.5 has been added, noting that, "Window boards should be fitted to project a minimum of 25mm to a maximum 35mm from the finished wall."

Within section13 Ironmongery a new subsection has been added as follows…

"13.1 The Carpentry Contractor must install all door furniture strictly in accordance with the manufacturers fitting instructions."

"(i) Bolt fixings that are supplied with the rose furniture in the back-plate, must be installed through the door, to the rose on the opposing side, to prevent handles becoming loose over time."

"(ii) All supplied fixing screws must be fitted to affix the rose furniture to the door."

Subsection 19.7 has been expanded to note fixing of spandrel panels "…except where room-in-the-roof is supplied and installed by others. The Carpenter is to remove the lifting straps once the Spandrel Panel has been fixed into position. Any protective polythene sheeting is to be left in place whilst the roof is exposed to the inclement weather; but must be removed once the roof is water tight and prior to the ceilings being plaster boarded".

Subsection 19.12 has been amended to note that the Carpentry Contractor is responsible for fixing the tilting fillets to support the rafter support tray (by the Roof Tiling Contractor).

Tags: Carpentry

Ceramic Floor Tiling

Floor Tiling Rev. G 01.11.2013

The general format of the Trade Specification has been updated to be in-line with recent updates to other Trade Specifications. However, the main changes to the specification are within section 4.6, noted as follows, "The Contractor is to leave a minimum of 1m2 of spare tiles, from the same batch of tiles that have been used in the floor tiling operation, in case of small area remedial works. The spare tiles are to be left in an accessible area near to the location of the tiled floor area, i.e. where works are completed to the kitchen area these may be left behind the kitchen unit pelmet."


Revision K 01.07.2018

Wording to match tick schedule aligned and general update of Health & Safety.

Revision J 01.07.2017

Formatting changes only.

Revision I 01.11.2015

The trade specification for Cleaning has been rewritten based on feedback received from Divisions and Contractors. It now contains a clear table of cleaning area requirements at the appropriate visit noted.

Additionally, the term Sparkle Clean is now to be referred to as Final Clean.

Tags: Cleaning


Revision J 01.07.2017

Items 8 & 9 have been amended, 8 The contractor must produce a Materials Management Plan in accordance with CL: AIRE Definition of Waste Industry Code of Practice (DoW CoP), which includes information about reducing waste to landfill. 9 A Qualified person must be nominated to issue the Declaration to the Environment Agency in accordance with the CL: AIRE DoW CoP and provide verification report upon completion.

In addition to the adjustments above, a Demolition waste summary report has been added for waste materials to be collated and will be required as part of the waste management yearly review.

Drylining Coving Screed

Revision AC 01.07.2018

Communication of trades added in specification Carpenter & SIG Roof space.

Revision AB 01.07.2017

Formatting changes only.

Revision AA 01.10.2016

Section 7.10 has been amended to reflect the instruction for external wall to have a metal frames walling system to be applicable to flat over garages, constructed with timber floors.


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.

Electrical Downlighter Installation

Barratt / David Wilson Homes Standard Drawing DB-SD09-003


Revision I - 01.07.2018

General Health & Safety update and notes added for gravel boards where levels dictate use of.

Revision H - 01.07.2017

Addition of no. of bags of post concrete per fence type as per Remix post mix guide. This added notes 2.4, 3.5, 4.4, 5.4, 6.1,
7.7, 9.1, 10.2, 11.4 and 12.

Revision G - 01.07.2016

Section 1 Quotation Subsection 1.4 has been updated to include "Tanatone (Celbronzed or equivalent) pressure treated" timber.

New subsections 1.5 and 1.6 have been added as appropriate "Any timbers cut on site are to be resealed using Dulux Trade Exterior Woodstain" and "The Contractors attention is also drawn to the Company's Timber Sourcing Policy noting compliance with ethically and sustainably sourced timber."

Section 7 Closeboard has been amended to note panel widths of 2.7 to 3.0m with timber weather capping being fitted to all posts following feedback from a Divison. The depth that posts should be set in concrete in the ground has now been specified as 750mm.

Section 8 Gates has been updated to specify gates to be fitted to "1.8m x 100mm x 50mm timber wall plate" and "completed with a 'good quality' ironmongery, as approved by the Company, including galvanised Suffolk latch, galvanised Brenton padbolt, 200mm galvanised cabin hook for holding gate open to house wall or other timber post, including 900mm x 25 x 32mm gate stop fitted to post. Timber weather capping to be fitted to all timber posts." These requirements have been repeated for 900mm palisade gates on 1.0m posts.

Section 9 has been relabelled "Kick Rail" with a new section 10 added for "Post and Rail" added specifying 1.2m high fence.

Section 11 Pallisade has been simplified and naming added "Vertical Hit and Miss Fencing" noting only 75mm x 25mm spacings and 75mm x 50mm spacings. Again timber weather capping to posts has been added.

Subsection 13.4 has been removed in-line with the changes to the treatment noted in subsection 1.4.

Tags: Fencing

Fire Proofing

Revision A 01.10.2016

Contact references for the SIG Fire Protection Managers have been updated following recent appointments.

  • Fire Protection (PDF, 627 Kb)

    Barratt / David Wilson Homes Standard Drawing DB-SD09-19