Landscaping Expert

Karl Harrison is a Professional Landscape Gardener with 20 years’ experience and, as a member of the PGCA, is an expert witness for Landscaping projects. 

He is an ex-Military Engineer who has been a lead voice in the correct application of exterior timber structures since 2003. He has written the Timber and Composite Decking Guidance Specification for the Association of Professional landscapers.

Karl Harrison offers consultancy for the landscaping industry and provides the following services

Independent expert opinion  

CPR 35 expert witness

Extant reports

Timber and Composite Garden Decking Specification

Landscape Construction Specification

Paving & Walling Specification

Garden Design Advice

Site Evaluations & Valuations

Insurance Claims & Damage Reports

Landscape Assessments


Member of the Association of Professional Landscapers                   (MAPL)

Member of the Professional Garden Consultants Association           (MPGCA)

Member of the Horticultural Trades Association                                  (MHTA)

Member of the Institute of Engineering and Technology                     (IEng, MIET)

Graduateship of the City & Guilds Institute                                            (GCGI)

Member of Trustmark                                                                               (Government Endorsed Standards)

He is an editorial contributor to professional trade publications. He also contributes to Spons Guide “External Works and Landscape Price Book”. Karl lectures on occasion to Garden Design Colleges and Associations. Past sole UK distributor of timber decking for the Yvyra decking brand.

Karl is proud to be a Training Partner with the TASK training Academy which is a professional training centre for the landscaping industry.