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TGR Twilight Talk GBC (CPD) G#40045

By 4 October 2021October 10th, 2021Calculators, CPD, Encyclopaedia, Files

TGR Twilight Talk GBC (CPD)

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GBE CPD Metadata

  • File Name:
  • File Type: PDF of PPTX
  • File Size:
    • PDF Handout: 3 mb
    • PDF Show: 7 mb
  • Number of Slides/Pages:
    • PDF Handout: 8 Pages
    • PDF Show: 70 Slides of 88
  • Created for: TGR Twilight Talk
  • Presented to: Zoom 100 audience TGR Twilight Talk
  • Author: BrianSpecMan aka Brian Murphy ONC HNC Construction BSc Dip Architecture (Hons+Dist)
  • Created: 04/10/2021
  • Revision: A02 (A09 of Larger GBC CPD PPTX)
  • Updated: 10/10/2021
  • Tags: CPD, Lecture, Green Building Calculator, Design & Decision Tool,
  • ProductSets: Methods of Construction, Materials, Building Elements,
  • UserGroups: Students, Architects, Assistants, Technicians, Structural Engineers, Constructors

GBE CPD Content

(without images; See the slide show for the pictures)

Green Building Calculator Vs Carbon Terminator?

  • Step by step guide to calculating and costing the embodied and in use carbon load of your building
  • TGR Twilight Talk 5-6:30pm 11 Oct 2021

Welcome and Thank you

  • So many of you: 100 No. capacity booked and a few more in reserve 113 total
    • From UK
    • From EU (so sorry)
    • From International
  • GBC Version 1 users
  • GBC Version 2 preview
    • –Some curious
    • –Some challengers perhaps
    • –Some prospects I hope
  • And many familiar faces, lovely to see you all again

Green Building Calculator

  • © NGS GBE GBC 2011-2021
  • BrianSpecMan Murphy GBC Number-Cruncher
  • Version 2 launch 1st March @ FutureBuild 2022 Digital Arena Stand L68

This Presentation on GBE:


  • x minute Polls scattered throughout
  • 10 minutes intro to GBC V2 %%%
  • 25 minutes tour of GBC V2 %%%
  • 5 minutes demonstration of GBC V2 %
  • 2 minutes case study in use
  • 45 minutes Q&A including polls

Poll 1 State of the Industry`
Where do the construction industries problems lie?

  • –Education & Training
  • –Legislation & Interpretation
  • –Clients & Briefing
  • –Quantity Surveyors & Cost Planning
  • –Procurement
  • –Manufacturers, Suppliers & Product data & test evidence
  • –Brexit (temporary or long term?)
  • –COVID (temporary or persistent)
  • –BREEAM & other EAM
  • –Environment & Biodiversity Crisis & Declarations
  • –Meeting RIBA Carbon Challenge
  • –All or many of the above

Poll 2: Who is out there?
What professions are in the audience?

  • Clients, Client Bodies, Self-builders, Facilities managers, Property managers
  • Architects and other design professionals including: Technicians, Surveyors, Engineers
  • Quantity Surveyors, Cost Planners, Estimators, Buyers
  • BREEAM etc. assessors, carbon counters, environmental advisors
  • Manufacturers, Makers, Fabricators, Suppliers, Agents, Retailers,
  • Constructors, Tradesmen, Artisans, Installers, Applicators, Sub-contractors, Contractors
  • Project managers
  • Others

Green Building Calculator

  • I want.. I want.. I want..

I am coming at this problem:

  • As a(n):
  • Technician and Architect by training
  • Specification Writer by choice (£2400m track record)
  • Side Line spectator with frustration
  • Observer of projects going wrong:
    • –Briefing battens dropped at each interchange
    • –Because of cost plans and procurement
    • –Lack of joined up management of it all
    • –Loss of scrutiny of competency of anything

I don’t want: A building Performance Gap

    • –Started by philosophical, aesthetics and snappy-graphics education
    • –Little or no technical, physics, science, numeracy, environmental education
    • –Increasingly challenging Legislation Regulation interpretation and Administration
    • –Discouraged and shrinking supervision role
    • –Evolves into vulnerable technical design
    • –Undermined by surreptitious substitution
    • –Brought on by inadequate tender
    • –Manipulated by Dutch bargaining
    • –Lubricated by power over supply chain manipulation
    • –Facilitated by out of control & bespoke procurement methods
    • –Muddied by misaligned perceptions
    • –Encouraged by Constructing Excellence 10% year on year improvement
    • –Compounded by 2013 Industrial strategy -33% cost, -50% emissions, -50% time
    • –Cost cutting in disguise as “value engineering”
    • –Driven by inadequately specific, incompetent cost planning
    • –All leading to: incapacity of construction sector to deliver:
    • –Client’s:
      • bespoke design, green brief, investment ambitions & competent building

I want clients

  • with aspirations and objectives for a Healthy, Environmental, Useful building:
    • –To know they can engage a building designer team who have the tools and skills to meet their brief
    • –To be able to invest well and get what they want;
  • not be driven down the ‘business as usual’ cost cutting route initiated by QSs bad cost plans and procurement that adds a fee to reduce quality
    • –To know that their aspirations & objectives will survive all the way to completion on site

I want building designers to be able to:

  • Do their own Cost Planning on small jobs, not needing a QS
    • –based on the real cost of doing it greener and better for client
    • –not just cheapest-wins every time
    • –Don’t set yourselves up or a fall
    • –without a QS
  • Who steers the project towards financial and performance gaps
  • Avoiding approximate elemental pricing rates
  • Avoiding non-representative labour rates
  • Avoiding incompetent violet price books
  • Immediately understand the environmental impact
    • –of their construction or refurbishment methods
    • –Help make better informed choices of materials or products
    • –Become carbon literate

I want building designers to be able to:

  • Compare alternative scenarios easily, quickly
    • –to begin to build an understanding of the consequences of their choices
    • –in time be able to intuitively choose lower impact materials and methods
  • Intelligently interrogate the bill of materials
    • –do environmental analysis on the fly.
  • Access comprehensive generic materials and product datasets at their fingertips
    • –adopt, apply and interrogate designs

I want building designers to be able to:

  • Know where a product was invented to be used
    • –not risk its inappropriate application
    • –‘Post-Grenfell function’ Version 3
  • Close the performance gap:
    • –Energy Version 2,
    • –Airtightness, V later
    • –Fire, acoustics, indoor air quality, etc. V later
    • –Services design, lighting design, V later
  • Have access to competent elemental assembly datasets
    • –892 already for Version 3
    • –For use in the absence of know-how to assemble their own.
    • –Choose from and adopt or adapt competently

I want building designers to be able to:

  • Have a low cost tool affordable by small practices
  • Have a multi-functional tool that interrogates the same building model/dataset
    • –That only has to be built once, to get many results
    • –Unlike WRAP and BRE tools
  • Submit to architectural competitions and awards
    • –that insist on embodied energy, embodied carbon and sequestered carbon and energy and carbon in use,
    • –as part of the criteria for success
    • –with an appropriate weighting I hope.

I want Non-BIM’ers

  • Who have no need for BIM
  • Who cannot afford to implement BIM
  • Not doing Government work, not needing BIM
  • Have not experienced the benefits of BIM
  • To be able to do BIM-app-type analysis outside of BIM
  • Interrogate the data and get useful results
  • In the future:
  • Enable seamless BIM adoption later
  • Two way flow of information between BIM and GBC and visa versa

I want Quantity Surveyors to:

  • Become a useful part of procurement process
    • –Cost planning has to do better than it has done over last few decades
    • –Pricing books are woefully inadequate
  • (do not reflect what is going on out there)
  • Tradesmen rates are wrong as far as we can tell
    • –Elemental rates are limited in scope
    • –Accurate Cost planning appears to be impossible
    • –Don’t propose D&B etc. if the client wants bespoke, quality and good Investment
  • Be Quality Surveyors not Quantity Surveys
    • –Why give the client a Violet cost plan for a green brief for a green building?
    • –Why give them false expectations? And then fail from then onwards?
    • –Be more accurate than +/- 10% measuring and worse estimating
  • Create the ‘Green Building Price Book’
    • –Alistair McConnochie proposed 20 years ago
    • –to become a reality, inside GBC
  • Do Green, competent Cost Planning
    • –not win the ‘race to the violet bottom’
  • Do real Value Engineering of green stuff into the project, not out of it
    • –not cost-cutting disguised as Value Engineering;
    • –but will they look at the bigger picture?
  • Do Whole Life Value without charging an extra fee

I want procurement to:

  • Focus on the client expectations
    • –No more novated designers without whistleblowing clauses
  • Not focus on low cost and fast delivery
  • At the expense of performance & quality
    • –Craft supervisors not QA box tickers
    • –Not sub-contracted snagging
  • Not create long supply chain barriers between designers and craftsmen
  • Manage interfaces between packages
    • –Deliver consistency of end results for whole building
    • –Easy to maintain by client’s FM
  • Go back to General Contracting if that’s enough

I want manufacturers to:

  • Make multi-functional materials, products and systems:
    • –But avoiding composites and mixing natural with technical materials
    • –To replace many singular function alternatives
    • –That succeed in Value Engineering processes
  • Because they are difficult to substitute
  • Make low impact materials and products
    • –Not hide behind BRE GGtS Generic Materials Assessments
  • at industry sector level: aggregated average grey not green or violet
  • Make their independently verified credible data available
    • –as ‘big open data’ in ‘consistent formats’
    • –Readily interrogated by calculators with intelligent search functions
  • Populate GBC Product Data Collection tables to create a single robust source and allow integration into GBC & bespoke Calculators
    • –Or share NBS Source datasets
  • In BIM provide:
    • –High Levels of Information (LOI)
    • –Before High Levels of Detail (LOD)
    • –Enable High Levels of Accuracy (LOA)

I want tenderers

  • To be able to use the built-in calculator
    • –as the Bill of Quantities Tender Document
  • To not have to price the job with every intention of making claims
    • –Because retention moneys will never be paid without a fight
    • –Dutch bargaining discounts will be expected
    • –Main-Contractor levy or discounts will be expected
    • –Payments will be late: 3 months is normal today
    • –Especially on Guaranteed Maximum Price GMP domestic tenders
  • To be able to price the job properly:
    • –not chasing some false illusion cost plan,
    • –to allow trades people to have the time to care
    • –and do a competent job using proper materials
    • –Accurate and complete tender documents can invite accurate pricing

I want Specification Substitution to be done:

  • –Transparently with all the facts and figures available
  • –about the consequence of every change,
  • –other than just cost savings for the contractor or shared with the client

I am reminded to
Be the change you want to see in the world

  • Mahatma Gandhi

Green Building Calculator Website

V2 Component Parts

  • Product Information Providers
  • Product Data Collection
  • Excel mechanisms
  • Data Sources
  • Data inputs
  • Generic Materials Datasets
  • Choosing targets & Data sources
  • Option Switches for more detail
  • Choosing
  • Price Information
  • Chosen Elements
  • Choosing Components
  • Choosing Materials or Products
  • Number Crunching
  • Checking Targets Met
  • GBC Users
  • Dashboard
  • Summary Sheets
  • Purpose of Green Building Calculator

V3 – V33 Component Parts

  • Product Information Providers
  • Product Data Collection
  • Elemental & Sub-elemental Assemblies
  • Specifications
  • Prices
  • Scope of Work
  • Other Disciplines
  • Choosing targets & Data sources
  • Impacts
  • LCA & design Life
  • Interiors
  • Waste
  • Plastics
  • Circular Economy
  • Self Build
  • Biodiversity
  • Preliminaries
  • MEP Services
  • Regional International Variations
  • Bespoke Modules

Green Building Calculator Case study:

  • International Timber Competition
  • 28th May 2020

Design Review and Carbon Data

  • Architectural Competition Entry
    • –Metsa Timber Technology Competition 2020 Entry
  • exStudent Samael Coco LSBU Post Graduate Architecture EREID Module
  • Entry requires carbon data
    • –Samael needed help
    • –Called on GBC to provide it

GBC evolved out of calculators

  • 2 of GBC’s component parts were developed during EREID course
    • –Energy and Resource Efficiency in Design
    • –Whole Building Energy & Carbon in use
    • –Whole Building Embodied Energy and Carbon & Sequestered Carbon
    • –The part time students took the calculators back to their offices
    • –And used them on live projects


  • Replacement of 1960’s tower block load-bearing precast concrete facade
  • Load-bearing solid wood panel
  • Kerto LVL Laminated Veneer Lumber
  • Jigsaw inter-connecting edges
  • Connected to an interlocking solid timber super-structure


GBC prepared and provided:

  • U value calculations with each insulation option
  • In use Energy & Carbon comparisons:
    • –Building Regulations AD L
    • –AECB Carbon lite,
    • –Passivhaus
    • –LETI U values
  • Embodied Energy, Embodied Carbon and Sequestered carbon
  • before and after calculations

Elemental U values comparisons

Elemental Embodied Energy, Embodied Carbon and Sequestered Carbon

Int. Timber Competition Entry

Green Building Calculator Q&A

  • A few Polls first

Poll 3: Your wants?

What do you want in a MS Excel based Design & Decision Tool focused around carbon counting?

  • –Blue sky thinking: no holes barred, no pebbles unturned
  • –Write down as many as possible
  • –Short phrases initials or acronyms if possible?
  • –And ranking of most popular

Poll 4: Scope of Costs
What would be useful to you soonest?

  • Bill of Materials > Bill of Quantities
  • Green Building Price Book within GBC
  • Cost Planning function:
    • –Record recent tender rates into look up table
    • –Record Sub-contract quotes into cost plan
    • –Build Cost
    • –Prelims profits overheads and Fees
  • Tendering
  • In use fuel Cost
  • Cost pay back
  • Carbon pay back
  • Value Engineering (Not cost cutting)

Poll 5: Scope of Calculations
What would be useful to you?

  • Areas, Volumes, Quantities & Weight calculations
  • Form factor calculation
  • Insulation thickness per U value calculations
  • Analysis at levels:
    • –Component
    • –Element
    • –Building
  • U value Calculator
  • Condensation check: Version 3 or 4
  • Decrement Delay Overheating check: Version 2 or 3

Green Building Calculator
GBE V2 In Detail

V2 Singular/Multiple Switches

  • Was on every page
  • Now on it own page

V2 Schedule of Accommodation

V2 Roofs Parts

  • Future: Other Roof Geometry

V2 Room By Room Heat Losses

V2 Form Factor

V2 Scope: Building Elements

  • U value Envelop Elements
  • Non-U value Envelop Elements

V2 Building Element Areas

  • Outside of Uv Envelope Building Elements
  • Foundations
  • Structural Frames
  • Secondary Elements
  • N Furniture Fixtures Equipment (FFE)
  • Landscape
  • Domestic MEP Services

V5 Non-Domestic MEP Services

V4 Bespoke Project Specific Items

V2 Singular/Multiple Switches

V2 Engage Singular/Multiple

V2 U values Etc. Targets

  • Regulations, Public Consultations, Design Standards, Campaigns

Materials > k values > U values > Thicknesses

V2 Decrement Delay

  • Insulation Thickness
  • (In Development)

V2 39 No. Elements

  • U or R value
  • 12 secondary element U/R values
  • Refurb Actions

V2-V3 Condensation Check

V2-V3 Decrement Delay Overheating Avoidance

V2 Bill of Materials Quantities Labour Accessories Products Costs

V2 Elemental Costing


ICE 3.0 database carbon reporting options

EN 15978

EN 15804


  • Each row is a component of an element (3 to 20 components make up an element)
    • –(framing insulation lining)
  • Each group of components makes an element (up to 39 make up a building)
    • –(partition, wall, floor, roof)
  • Each column is an EN 15804 stage A-D or subdivision column
  • Each group of columns is an environmental impact (7 groups 7 impacts 1 is carbon=)

V1 Resistances V2 no change

V2 Conductivities

V1 Properties of Products

V2 Secondary Elements Windows & Glazing options

For U Value Calculations

V1 U value > Watts > CO2 In Use

V2 Carbon Mains Electricity EU

V2 UK Fuel Carbon Factors 2020

V2 Fuel Costs Dataset

V2 In-use Energy Carbon Costs

Green Building Calculator Demonstration

Green Building Calculator Q&A

Poll 6: Scope of Work
What would be most useful to you soonest?

  • –New Build,
  • –Retrofit,
  • –Domestic,
  • –Non-domestic
  • –All of the above

Poll 7: Scope of Parts
What would be most useful to you soonest?

  • –Building
  • –Structure
  • –Interiors
  • –Services
  • –Landscape
  • –Infrastructure
  • –All of the above

Poll 8: Scope of Analysis
What would be most useful to you soonest?

  • –In use Energy
  • –In use Carbon
  • –Embodied Energy
  • –Embodied Carbon
  • –Sequestered Carbon
  • –Life Cycle Assessment

Poll 9: Performance Targets:
What would be most useful to you soonest?

  • –Building Regulations AD L, (E, W, S, NI)
  • –Design Standards: AECB, PHI, LETI,
  • –Campaigns: ACAN, Superhomes,
  • –Challenges: RIBA
  • –Client Standards: TfL,
  • –Planning Standards: WAG TAN6
  • –Other national Regs or design standards

Poll 10: Scope of datasets:
What would be most useful to you soonest?

  • Materials & properties
  • Insulation materials & properties
  • Products, Accessories & properties
  • Materials & Product Costs
  • Fuel & costs
  • ICE 3 Embodied Carbon
  • LCA & EPD datasets

Poll 11: Scope: Future Versions
What would be most useful to you soonest?

  • Selection from 33 versions planned:
  • Post-Grenfell competency
  • Links to GBE websites:
    • –Low carbon materials guidance
    • –Self build guidance
    • –Waste reduction in design guidance
  • Plastic avoidance, plastic %, recycled plastics
  • Recycled content,
  • Circular economy:
    • –Dismantle-ability, reclaim-ability, reuse-ability,
  • Waste awareness:
    • –Waste calculator,
    • –Waste cost calculator
    • –Embodied energy and carbon in Waste

© GBE GBC GBL NGS ASWS Brian Murphy aka BrianSpecMan **
4th October 2021 – 10th October 2021


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© GBE GBC GBL NGS ASWS Brian Murphy aka BrianSpecMan **
4th October 2021 – 10th October 2021

TGR Twilight Talk GBC CPD
See Also:

GBE Future Events

GBE Events



GBE In-House CPD

GBE Lectures

RIBA Part 1 Under Graduate

RIBA Part 1 Year 1 (LSBU 2007-2008) Elements


RIBA Part 1 Year 2 2018-2019-2020 (University of Hertfordshire)

RIBA Part 1 Year 2 (LSBU 2016/2017)

RIBA Part 2 Post-Graduate

RIBA Part 2 M Arch Lab 1 University of Hertfordshire 2019-2020

GBE Issue Papers

CPD Manufacturer’s

GBE Manufacturer

GBE System

© GBE GBC GBL NGS ASWS Brian Murphy aka BrianSpecMan **
4th October 2021 – 9th October 2021

TGR Twilight Talk GBC CPD G#40045 End.

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