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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 and 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 please refer to the Home page for information on how to report details of these to us.

Jon Hayward
Senior Group Commercial Manager

Brickwork

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

Carpentry

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."

Cleaning

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

Demolition

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 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.

Electrical

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

Fencing

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.

Glass Balustrades

Revision A - 01.07.2017

Formatting changes only.

Landscaping

Revision H 01.07.17

Formatting changes only.

Revision G 02.02.2015

Section 5.2 British Standard references have been updated.

Section14.3.1 Removal of the spot treatment "with Paraquat".

Loft Insulation

Revision M - 01.07.2017

Formatting changes only.

Revision K - 01.07.2016

Group Supplier information has been added specifying the supply details of Superglass Insulation Ltd. Distribution has also been added for the supply of insulation through SIG Interiors.

General section k has been amended to note the requirements for Contractors to check that Manthorpe G502 profiled ventilation roll is being installed. The requirements for the Electrician installing loft cone fire hoods have been removed as these are now specified as fire rated downlighters.

Section 3 Loft Insulation has been amended to reflect the type of insulation being Superglass Multi-Roll 44.

Mastic

Revision O - 01.01.2018

3.1 addition - Do not silicone around any Amtico installation for a minimum of 72 hours after installation to allow for flooring adhesive to fully set.

Revision N - 01.07.2017

Formatting changes only.

Revision K - 01.07.2016

Within section 1, Quotation, a new subsection has been added limiting the inclusion for fire proofing, "1.4 Fire proofing within this trade specification is limited to dwellings and flat above garage units. Where Fire Proofing is required to Apartments the Contractor must refer specifically to the Fire Proofing Trade Specification."

Section 2, Mastic, has been split into 2. External Mastic and 3. Internal Mastic. Within section 3, subsection 3.1 two new points have been added for mastic to be completed "(v) Around cavity closer prior to fitting the window frame. The joint between the cavity closer and blockwork to be sealed prior to dry lining." and "Around mechanical extract fans where passing through the wall."

Within subsection 3.1, point (vii) has been amended to remove internal garage personnel doors with this being added into a new subsection 3.2 "Garages, where there is an apartment / flat above, to be sealed with intumescent acoustic sealant as follows: (i) All perimeter ceiling plasterboard joints sealed with intumescent acoustic sealant. (ii) Internal garage personnel door frames."

A new section 4 has been added to note Schedule of Material to be used when undertaking mastic works, "The Contractor is to use only the following materials in the locations noted above unless expressly noted otherwise by the Company in the tender enquiry."

Tags: Mastic

Painting and Decorating

Revision S 01.01.2018

3.6 Rewording - External work is not carried out in adverse weather conditions. No work shall be carried out below 5 degrees C. (solvent borne) or 8 degrees C. (water borne) or when the humidity exceeds 80%. All work shall be protected against frost.

4.2 additional wording - Where additional filling is required after the application of the mist coat this must be brought forward with a thinned coat of Dulux Trade Supermatt prior to the application of finishing coats. This reduces filler flash through.

Revision R 01.07.2017

Product codes/names have changed.

Revision Q 01.10.2016

Within the Preparation of Painting Surfaces, Section 4.1, the requirements for painting internal doors has been updated following
the changes to the Group Commodity Agreement for procurement of either primed finish doors or pre-finished doors; door treatment is to be advised by the Surveyor at tender stage to allow the appropriate allowance to be provided as part of the quotation.

Within section 4.2 Plastered Surfaces, the painting upgrade options for Gold and Diamond finish have been removed as is now one standard finish specified.

Plot Groundworks

Revision Q 01.01.2018

12 -12.5 Screed section from Drylining specification added as a crossover where screeds are completed by groundworker.

Revision P 01.07.2017

Formatting changes only.

Revision O 01.01.2017

Section 5, Drives, has been updated to note revisions to the construction specification. Subsection 5.2 now notes that drives are to be
constructed in two stages, up to and including binder course and a second visit to complete the surface course. Subsections 5.4 and 5.5 have been updated to reflect the revised construction specification for private and shared drives introducing 20mm Stone Mastic Asphalt in the surface course for private drives and 30mm for shared drives. Subsection 5.6 has been added to specify the minimum requirements to ensure drives drain away from buildings or be set a minimum distance from the building in accordance with NHBC guidelines. Subsection 5.7 has also been added to specify the detail for the demarkation of bays within multiple parking bays.

Section 8, Paths/Patios, has been amended to specify 32mm paving slabs as currently supplied in accordance with the Group commodity agreement with Marshalls.

Section 11, Substructure, has been amended to specify the quality of the topsoil to be imported where the Contractor is to provide allowances within the tender. Details have also been added to subsection 11.8 for cast-insitu suspended slab construction, compliant with 2013 Building Regulations. Subsection 11.9 details have been added for Timber Frame Construction, the requirements for trench block sizing for cast-insitu floor slabs and beam and block floor slabs has been noted. Additional notes have been added to instruct the Groundwork Contractor to use timber/metal sections as shuttering for the concrete and not splash brickwork with sacrificial insulation. Subsection 11.13 has also been updated to reflect the insulation requirements for Beam and Block Floor Construction, compliant with 2013 Building Regulations.

Plumbing and Heating

Revision AL 01.01.2018

10.3 New – All gutter brackets to be installed at 600mm centres maximum.

18.5 New - The locations of rodding access points are to be provided at 3 storey intervals or less and above the spillover levels of appliances as per approved document H.

Revision AK 01.07.2017

Added to section f) All works to be carried out in accordance with water supply (water fittings) regulations 1999 section 73 (1) outlines the requirement of any property to prevent any system which causes or is likely to cause contamination from being connected to a water supply.

Item 2.9 amended. Boiler flues must not be sealed into walls, ceilings or floors with mastic, plaster or cement or any compound that hinders movement of the flue. The only instance that a flue is sealed is where a conventional boiler is connected to a concentric flue exiting a masonry wall to be sealed with a non-setting mastic.

Item 15.2 amended all ground floor radiators are to be fitted with a lock shield drain off radiator valve and/or Thermostatic/Wheel head valve as shown on the heating consultant design drawingsTRV's can be fitted vertically or horizontally depending on space issues encountered. All other radiators are to be fitted with a lock shield valve and/or Thermostatic/Wheel head valve, again as shown on the heating consultant design drawings.

Item 20.8 amended First fix soil stack test certificate, due to NHBC request.

Render

Revision H 01.07.2017

Product codes/names have changed.

Revision G 01.07.2016

The General section formatting and notes have been updated to bring these in-line with all other specifications including, Clearing, Defective Workmanship, Health & Safety, Materials, Manufacturer's Products, Site Conditions and Subcontractor works. Group Supplier information has been added to reflect that of Saint Gobain Weber Limited.

Section 3 has been updated to reflect the materials and products for fixing as specified by Weber including dry-dash products and water repellent admixture.

A new section 4 has been added describing the Application of renders, specified by Weber.

Old section 4 Weather Constraints has been renumbered 5 with a subsection added 5.2 "Protection from unfavourable weather conditions should always be provided during application and early age curing". In addition, subsection 5.4 for hot weather application has been add to with notes, "Application should be avoided where temperatures exceed 30° Celsius".

Subsection 6.1 has been amended reflecting the application of render to the substrate, noting that, "The substrate must have a good mechanical key suitable for rendering." and where render is applied to smooth dense block that "Weber.rend ald must be used to provide an artificial key".

Tags: Render

Roads & Sewers to Binder Course inc. stage 2

Revision N - 01.01.2018

Roads & sewers to binder course inc. stage 2 (formally Roads & sewers to Binder course) – Rev N 01.01.18 & Roads
& Sewers stage 2 – Rev I 01.01.18

Revision M - 01.07.2017

Formatting changes only.

Roads & Sewers Stage 2

Revision I - 01.01.2018

The Roads & sewers stage 2 trade specification has been amalgamated into the Roads & Sewers to Binder Course inc. stage 2
trade spec. at this stage the documents have been updated separately if there are instances of stage 2 only contracts to be tendered or issued.

Revision H - 01.07.2017

Formatting changes only.

Roof Tiling

Revision V 01.01.2018

Supplier information changed.

15.4 Rewording - Cut plain tiles are not acceptable. Purpose made plain tile-and-a-half or half tile must be used. Additionally, cut single lapped interlocking tiles must not be used unless unavoidable in which case cut tiles less than half the normal cover width must either be adhesively bonded to adjacent full tile using a suitable sealant or mechanically fixed to adjacent tile using a minimum of two fixings.

Revision U 01.07.2017

Formatting changes only.

Scaffolding

Revision P 01.01.2018 a

5.2 The removal of table lifts exempt from having gates also appendix 10 section 18.

7.6 Rewording - Brick guards must be provided by the Contractor on all working lifts which are secured to the guardrails and their lateral movement prevented. They must be capable of supporting the weight of any materials liable to fall against them. This can be achieved by a proprietary guardrail/toeboard system if this is deemed appropriate. (Note: from 1 January 2016, these must be heavy duty plastic or plastic coated metal and self-securing).

9.2 Rewording - End caps must be fitted to the external facing transoms where the tube protrudes more than 50mm past the fitting & is below 2m from the walking surface. Where standards exceed 2m from the working platform, there is no requirement for end caps

Revision O 01.07.17

Alterations to this specification are as reviewed with recommendations from Vince Coyle.

1.14 It is the Contractor's responsibility to provide all tools/equipment as required. Any electrical tools/equipment brought onto site must be battery operated or 110v and have been appropriately tested/inspected. The operatives must have received the appropriate training for the tools/equipment being used and have relevant certification. The contractor must maintain a register of work equipment inspections as required by PUWER and evidence of training.

2.13 Designs which are required, and are not detailed within this specification will be specific to the site i.e. pedestrian walkways, protection fans etc. These must be approved prior to the commencement of work. The designs must be within TG20 design criteria or approved by an accredited designer.

5.1 has been re-worded

5.4 added Ladder safety rail to be installed on all externally positioned ladders.

5.6 amended Ladders must be adequately secured as per TG20 guidelines or with designed brackets, to prevent sideways and outwards movement, at the correct angle of 75° and extend 1m above any landing point. Transom clips are not permitted.

5.8 added Table lifts must be provided with self-closing gates as specified for external platform access points.

7.3 added Gable handrails to prevent falls from roofs where that distance exceeds 1.5m with a minimum roof height for roofer's access of 2.0m, the handrails from plan position are a minimum of 100 mm from the roof edge and a maximum of 225 mm. see appendix 11.

Note appendix 11 has been altered with the addition of the above including diagram and tables provided by Vince Coyle.

7.5 has been re-worded

8.8 amended The scaffold boards on the internal edge of the working platform must be secured to prevent them becoming dislodged at a minimum of two fittings must be provided as close as practicable at either end of the board.

8.9 added Where lapped boards on system scaffold occur, these must be secured with mechanical fixings.

9.2 amended End caps must also be fitted to the external facing scaffold transoms and to the top of internal standards where these protrude the working platform to avoid injury to persons coming into contact with them. Tubes must not protrude more than 50mm past the fitting on all scaffolds below 2m.

13.5 has been re-worded

19.4 added The designated Supervisor must provide a weekly SHE Inspection of the company's activity. This must include compliance with the current scaffold specification, as well as other SHE management elements identified in this specification. The weekly inspection must be presented to the company.

Vinyl Tile, Sheet & Laminated Flooring

Revision H 01.01.2018

1.12 Rewording - All flooring is to be laid using Amtico or Moduleo approved adhesive and used in accordance with the manufacturer's instructions, specification and recommendations with suitable floor preparation for the above flooring systems.

1.13 Rewording - All edges of vinyl flooring are to be sealed to skirting and doorways in accordance with the manufacturer's instructions and specification. NO SILICONE SEALANT MAY BE USED FOR 72 HOURS AFTER FLOORING HAS BEEN INSTALLED TO ALLOW ADHESIVE TO FULLY SET.

2.1, 2.2 & 2.3 Addition of or other liquid sealer / primer, or other appropriate specialist & or similar.

2.1 Rewording - Areas OF 12m2 OR Over Must be fully adhered to the sub floor.

3.4 Rewording - Gaps between the skirting & floor finish must not exceed 3mm for vinyl sheet and for Laminate/wood, a minimum of 8mm (if installed before skirtings boards there would be no gap.

Revision G 01.07.2017

This spec has had a major update to include Amtico, Moduleo & quickstep floor coverings. Based on customer care issues, noise,
subcontractor feedback and fitting guides from manufacturers.

Wall Tiling

Revision I 01.07.2017

Formatting changes only.

Revision H 01.10.2016

Addition of 1m² of spare tiles to be left in the property, as noted in section 16.4

Window Installation

Revision B 01.01.18

Eurocell contact information changed. Cavalok contact added.

Revision A 01.05.17

Means of escape windows updated.

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