Offsite Housing The Portfolio Approach. Stephen Wightman. Managing Director SIG Offsite

Transcription

1 Offsite Housing The Portfolio Approach Stephen Wightman Managing Director SIG Offsite

2 SIG Offsite Who are SIG Offsite? Division of 2.5 Bn SIG Group Commodity through to fully volumetric Portfolio Offering Incremental Offsite Panels through smart walls to fully volumetric Facilities 3 Manufacturing Facilities 400 Employees Residential & Education Markets

3 The Solution 96% of Volumetric Modular building projects are delivered on time and on Budget. Up to 40% reduction in build times Future Maintenance costs - 30% Ministry of Defence review 2013 With the use of Off-Site Manufacture overall productivity of UK construction industry is increased by almost 2.5 times Wajiha Mohsin Shahzad - Massey University: June 2012

4 Construction Time

5 2 D Why? Pros Easiest cost comparison Established technical solution Simple design requirements Measurable benefits Cons Still weather dependant High level of interaction with traditional trades on site Programme management very time consuming Level of control of manufacturer reduced

6 3 D Why? Pros Fastest construction time Least weather dependant Highest quality Safest / least disruptive Cons Needs high value / volume space Technically more challenging design time Cost models difficult to compare / appears expensive More challenging to construction methodology / personnel

7 Portfolio Approach Principles of a Portfolio Approach? Meeting Client need Cost competitiveness on a case by case basis Multiple / composite offerings Client based organisation structure and contact Technology / Material Agnostic To suit application Site constraints Flexible solution

8 Panelised Solutions Flexible portfolio of solutions Timber Framed Standard Panels I Roof Masonry I House

9 I Roof Flexible Panelised Solution From Terrace to Detached Property Half day install single plot Clear spanning / room in roof Template designs with dormers / rooflights Complete above wall plate Watertight ready for gable brickwork / tiling contractor Low stress solution for Site Manager

10 I Roof

11 I House Joint Venture Between H+H and SIG Feel of traditional masonry solution Lightweight panels (80kg) Timber floor cassettes Full house every 3 days Most efficient for RSL / PRS

12 I House

13 Hybrid Solution Volumetric Core High value space Multiple house content

14 Hybrid Solution

15 Hybrid Solution Volumetric Core High value space Multiple house content Panelised Open Spaces Low value / volume space High cost competitiveness Rapid Build Flexibility in fit out and finish

16 Hybrid Solution

17 Volumetric Solution Flexible portfolio of solutions Metal Framed Timber Framed Single Module Solution per floor Standardised design / flexible options Targeted at Specialist / RSL / PRS Long term relationships key

18 Making it work Partnership Designer / Developer / Manufacturer / Planning Authority Open approach Focus on strengths of the principle Design Standardisation Choose The Right Design Single Module per storey per house Maximise Factory Finishes Minimise Site Time - Details

19 house Concept

20 Choice of Size Making it work

21 Choice of Configuration Making it work

22 Choice of Configuration Making it work

23 Choice Of Layout Making it work

24 Choice Of Layout Making it work

25 Manufacturing Challenges Productivity day cycle Managing customisation / consultation Design changes

26 Did It Work? High Client Engagement Multi Award Winning Output up 250% for % for 2018 Alternative designs

27 Client Choice Buying this house was as close as we are going to get to building our own house from scratch

28 What is Y Cube Affordable, move-on accommodation for single people High quality design delivered by world renowned architects Sustainable in its design and with a 60 year design life Scalable, able to be replicated in both design and delivery Developed in partnership RSL / Architect / Builder

29 Design Challenges Module Format Single easily transportable module per living space High value per unit of volume

30 What is Y Cube

31 Design Challenges Module Format Single easily transportable module per living space High value per unit of volume Standard Chassis, different visible elements

32 Design Challenges

33 Design Challenges Module Format Single easily transportable module per living space High value per unit of volume Standard Chassis, different visible elements Design to Modular Grids Cladding interfaces External access arrangements

34 Design Challenges

35 Design Challenges Module Format Single easily transportable module per living space High value per unit of volume Standard Chassis, different visible elements Design to Modular Grids Cladding interfaces External access arrangements Design for Deconstruction Dry fit interfaces Reconfigurable arrangements

36 Design Challenges

37 Mitcham in Numbers 5¾ months to build 37 units - 36 for residential use 26m2 per residence 50:50 nomination rights with Merton Council 2.2m total build cost including land c 53k per cube 12 year payback ( 1.7m debt) 65% market rent ( 148pw) 15pm to run helps alleviate fuel poverty Zero Accidents on site 18 month remedial cost >1% of modular cost

38 Success

39 Success

40 Key Challenges Design Is Critical Invisible Standardisation Fabric Materials Overall Envelope Standard Components Visible Customisation Internal Layout Overall Building configuration Selectable details

41 Offsite Housing The Portfolio Approach Stephen Wightman Managing Director SIG Offsite