01708 720 081
Roofing, Cladding & Building Envelope Consultants


A P Williamson Consultants Limited are specialists in the following services:
Mr Alan Williamson is recognised by Sweet & Maxwell as an expert witness,and is a chartered structuraland civil engineer and a Fellow of the Institute of Roofing. Mr Steven Williamson is a Member of the Institute of Roofing.
  • All disciplines of roofing (including metal roofs – both built up systems and composite panel, slating, tiling, single ply membranes, built up felt, zinc and copper), cladding and curtain walling, condition surveys and reports.
  • Annual or bi-annual roof audits of current and planned roof stock.
  • Dilapidation surveys and reports for roofing (all disciplines), cladding & curtain walling.
  • PPM Schedules for shopping centre’s, industrial buildings, residential buildings
  • Producing tender documents for roofing (all disciplines), cladding systems and monitoring the quality of works as they progress acting as a contracts administrator.
  • Roofing (all disciplines), cladding and curtain walling design, utilising calculations and full CAD drawings.
  • Checking drawings / carrying out site supervisory roles as works commence on all types of new build & refurbishment roofing & cladding works.
  • Roofing (all disciplines), cladding and curtain walling failure reports.
  • Roofing (all disciplines), cladding and curtain walling leak investigation reports.
  • Wind load calculations.
  • Drainage calculations.
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