MATERIAL SPECIFICATION - Construction Design & Management Regulations 2015 - Structural and Site Requirements

Oct 23, 2026

Uploaded by Mary Man

Material specification outlines mandatory compliance for construction works, requiring strict adherence to structural engineers’ details and confirmed dimensions for foundations, lintels, wall plates, and roof timbers. It sets CDM Regulations 2015 obligations, including appointment of principal designer/contractor where multiple contractors exist, and timely notification to the Health and Safety Executive under defined project thresholds. It also defines general requirements for CE-marked materials, no scaling from plans, site inspections approval, thermal bridging control, and ground/site preparation. Part A includes strip foundation specifications with BS EN 206-1, BS 8500-2, and depth rules.

LanguageEnglish

CategoryResearch & Report

FormatPDF

Pages1

Reading Time3 min

AccessFree to download

MATERIAL SPECIFICATION

CDM REGULATIONS 2015

DOMESTIC CLIENTS

HEALTH AND SAFETY EXECUTIVE NOTIFICATION

GENERAL REQUIREMENTS

MATERIALS AND WORKMANSHIP

THERMAL BRIDGING

SITE PREPARATION

EXISTING STRUCTURE

DEMOLITION

PART A: STRUCTURE

SUB-STRUCTURE

STRIP FOUNDATION

MATERIAL SPECIFICATION: NB. IF THERE ARE ANY ALTERATIONS TO THE SPECIFICATION THE CONTRACTOR MUST FIRST CONSULT THE CLIENT AND THE LOCAL AUTHORITY BUILDING INSPECTOR AND GAIN HIS APPROVAL. Specification and drawings to be read in strict accordance with Structural Engineers details. Engineer to confirm foundation sizes, lintel designs, wall plate size and locations & all roof timbers. Builder to ensure that he is in receipt of engineers details prior to commencement on site. CDM REGULATIONS 2015 The client must abide by the Construction Design & management Regulations 2015. The client must appoint a contractor, if more more than one contractor is to be involved, the client will need to appoint (in writing) a principle designer (to plan, manage and coordinate the planning and design works) and a principle contractor (to plan, manage and coordinate the construction and ensure there are arrangements in pace for managing and organising the project) . DOMESTIC CLIENTS The domestic client is to appoint a principle designer and a principle contractor when there is more than one contractor on site, if not your duties will automatically be transferred to the contractor or principle contractor. The designer can take on the duties, provided there is a written agreement between you and the designer to do so. The Heath and Safety Executive is to be notified as soon as possible before construction works start if the works:(a) last longer than 30 working days and has more than 20 workers working simultaneously at any point in the project. (b) Exceeds 500 person days. GENERAL REQUIREMENTS · The plans relating to the proposed project are to be read in conjunction with all appropriate structural engineer's details and calculations. · All products and materials to be CE marked and to be fixed, applied or mixed in accordance with the manufacturers' instructions/recommendations and specifications. · Do not scale from the plans. Use figured and on site dims only. If queries arise on site contact PJH Architectural Services immediately. · The contractor is to check all dimensions on site prior to commencement of the work and any discrepancies to be brought to the attention of the site agent. · All work regarding this project is subject to the Local Authority Building Control officer's or approved inspectors approval and satisfaction. · All statutory site inspections are to be seen and approved by the Local Authority Building Control officer or approved inspector prior to any covering up of any work. · The contractor shall take into account everything necessary for the proper execution of the works, to the satisfaction of the Inspector whether or not indicated on the drawing. · The contractor must carry out all investigations on existing structures on site prior to any demolition and ensure the safety of the buildings and personnel on site at any one time. · All materials shall be fit for their purpose. · All external softwood and all roof timbers to be vac-vac treated. All cut ends are to be treated on site prior to fixing. · All drainage and foundation is provisional and subject to the conditions encountered on site. · The existing buildings are to be protected for the duration of the works. All surplus material is to be removed from the site and site left clean by the contractor after completion of the project. MATERIALS AND WORKMANSHIP: All works are to be carried out in a workmanlike manner. All materials and workmanship must comply with Regulation 7 of the Building Regulations, all relevant British Standards, European Standards, Agreement Certificates, Product Certification of Schemes (Kite Marks) etc. Products conforming to a European technical standard or harmonised European product should have a CE marking. THERMAL BRIDGING care shall be taken to limit the occurrence of thermal bridging in the insulation layers caused by gaps within the thermal elements (i.e. around windows and door openings)

FAQs

What must be done before any alterations to the material specification are made?

Any alterations require consultation with the client and the local authority building inspector to obtain approval before proceeding.

Under what conditions must the Health and Safety Executive be notified before construction starts?

Notification is required if the works last longer than 30 working days and involve more than 20 workers simultaneously, or if the project exceeds 500 person-days.

What are the strip foundation requirements in this specification?

Provide 225mm x 600mm concrete foundations with concrete mix conforming to BS EN 206-1 and BS 8500-2, with a minimum depth of 600mm below ground level agreed on site with Building Control.

Oct 23, 2026

Uploaded by Mary Man