Enhancing High Performance Building Assemblies: The Potential of Wood Fibre Insulation to Optimise High Performance Construction.

Transcription

1 Enhancing High Performance Building Assemblies: The Potential of Wood Fibre Insulation to Optimise High Performance Construction Niall Crosson Building Physics Engineer MEngSc, BTech, MIEI Ecological Building Systems

2 Copyright Materials This presentation is protected by US and International Copyright laws. Reproduction, distribution, display and use of the presentation without written permission of the speaker is prohibited. Ecological Building Systems Ltd 2013

3 Program Education Credit Information Canadian Wood Council, Wood WORKS! and the Wood Solutions Fair is a Registered Provider with The American Institute of Architects Continuing Education System; the Architectural Institute of British Columbia and the Engineering Institute of Canada. Credit earned on completion of this program will be reported on behalf of members of each CES provider for those who complete a participation form at the registration counter. Certificates of Completion for non-aia, AIBC or EIC members are available on request. This program is registered with the AIA/CES for continuing professional education. As such, it does not include content that may be deemed or construed to be an approval or endorsement by the AIA of any material of construction or any method or manner of handling, using, distributing, or dealing in any material or product. Questions related to specific materials, methods, and services will be addressed at the conclusion of this presentation.

4 Presentation Outline Ecological Building Systems Company Background History & Development of Wood Fibre Insulation Manufacturing Methods for Wood Fibre Insulation Building Types and Applications Material Properties of Wood Fibre Insulation Site Considerations (Fire, Moisture,Handling) Installation of Wood Fibre Insulation Use in High Performance and Conventional Construction Wood Fibre Insulation in Building Refurbishment Wood Fibre Insulation: Market Penetration Future Developments Questions

5 Company Background Parent company: MacCann and Byrne (Est. 1906). Based in Athboy, Co Meath, Ireland Ecological Building Systems established in the year 2000 Import and distribute high performance diffusion open airtightness systems & a range of ecological insulation & building materials

6 Company Background Ireland: UK:

7 Primary European Woodfibre Board Producers

8 History of Woodfibre Board Insulation Woodfibre boards have been used since the early part of the 20 th century prior to WW2 GUTEX are Located in Gutenburg, Germany, in the Black Forest Family owned and operated since 1920 In 1932, began to manufacture wood fibreboards They now produce 14 different wood fibre insulation products Today, 130 employees, 4 shift-operation, 7 days a week

9 Woodfibre Board Insulation Manufacturing Wet Production Dry Production

10 Wet produced and dry produced woodfibre insulation Material contents of Wood Fibre Insulation

11 Wet Process Manufacturing

12 Wet Process Manufacturing

13 Wet Process Manufacturing

14 Wet Process Manufacturing

15 Wet Process Manufacturing

16 Wet Process Manufacturing

17 Wet Process Manufacturing

18 Wet Process Manufacturing

19 Dry Process Manufacturing

20 Dry Process Manufacturing

21 Dry Process Manufacturing

22 Dry Process Manufacturing

23 Dry Process Manufacturing

24 Dry Process Manufacturing

25 Dry Process Manufacturing

26 Dry Process Manufacturing

27 Dry Process Advantages Homogeneous composition (single-ply) Up to 240 mm thick Improved dimensional accuracy Increased tensile strength with relatively low density

28 Dry Process Advantages Homogeneous composition (singleply) Up to 240 mm thick Improved dimensional accuracy Increased tensile strength with relatively low density Diffusion open: µ = 3 (wet produced boards µ = 5)

29 Dry Process Advantages Energy Required by the Different Manufacturing Processes Homogeneous composition (singleply) Wet Process Thermosafe 100mm Dry Process Thermosafe-homogen 100mm Up to 240 mm thick Improved dimensional accuracy 100% 50% Increased tensile strength with relatively low density Diffusion open: µ = 3 Requires 40 % less energy 0% Energy consumption for manufacture per metric tonne = 100% Energy consumption for manufacture per metric tonne = 60%

30 Dry Process Advantages Product Composition According to Manufacturing Process Homogeneous composition (singleply) Up to 240 mm thick Improved dimensional accuracy Increased tensile strength with relatively low density Diffusion open: µ = 3 Requires 40 % less energy % wood composition

31 Woodfibre Board Areas of Application

32

33 Certification and Compliance Control 04 Quality seals and certificates for environment-friendly and healthy building materials Scope: Environment Health Function (composition and emissions)

34 Material Properties of Woodfibre Board Insulation Insulating Properties Low Thermal Conductivity (from 0.037W/mK to 0.05W/mK) Airtightness Wind Tightness Heat Protection Heat Storage Capacity Airtightness Wind Tightness Soundproofing Fibrous structure Density Flexibility Fire Resistance Structural protection and behaviour when in contact with fire Healthy Living Climate Diffusion open Vapour transfer Vapour Storage Capillary Active Sustainability Components Raw Material Recyclable Waste Code Reuse

35 Insulation in Winter

36 WHY thermal insulation? Average heat loss in non-refurbished buildings Protect against heat and cold Roofs 42% Improve comfort of indoor environment Save limited and expensive resources Reduce carbon emissions Walls 35% Windows 16% Improve building durability Cellars 7% Increase the value of houses

37 Comparison of thermal resistance of 100mm thick insulation R value of 100mm Insulation PUR Standard FG Mineral Wool EPS XPS Woodfibre

38 Cost per m2 for 100mm Thickness WOODFIBRE 20-60% embedded cost for transport to Ireland XPS EPS Mineral Wool FIBREGLASS PUR

39 Insulation in Summer

40 Insulation in Summer Design principles which assist in protecting against overheating: Carefully design, position and size windows relative to the sun Install windows with sunshades Employ wind-tight and airtight building design and practices Design and build ventilated constructions (exterior walls and roofs) Wood fibre Insulation Effective Protection Against the Summer s Heat Wood fibre Insulation (Thermal buffer) Conventional insulation

41 Insulation in Summer How can insulation contribute to this? Low thermal conductivity (λ in W/mK) High Denisty ( m3/kg) High Specific heat capacity (c in J/kgK) Thermal diffusivity (a) = Thermal Conductivity ( ) Density ( ) * Specific Heat Capacity(c) The lower the thermal diffusivity the better the summer heat protection and the thermal insulation in winter. Woodfibre provides the optimum combination of heat protection in Summer and thermal insulation in winter.

42 Insulation in Summer

43 Insulation in Summer Time lag and decrement factor with 180-mm Woodfibre insulation (density 110Kg/m3): Outdoor Air Temperature Time (24-h clock) Time Lag (10 hours) Indoor Air Temperature Time (24-h clock) Time lag = 10 hours Decrement (1/TAV) = 21 C divided by 3 C = 7

44 Insulation in Summer The same volumetric heat capacity, BUT very different thicknesses Woodfibre Softboard (110 kg/m3) 10 cm Glass/ Mineral Wool ( 110 kg/m3) 91 cm

45 Heat Storage Capacity Test Demonstrating Heat Storage Capacity of Woodfibre, Mineral wool and Polystyrene

46 Insulation in Summer Protection against heat in summer time lag in hours Bulk density: Blown Woodfibre = 35 kg/m³ Flexible woodfibre batts = 45 kg/m³ Blown Woodfibre/ Flexible Woodfibre Batts Woodfibre Weather Resistant Board 35 mm 50 mm 80 mm 100 mm 180 mm mm mm mm

47 Dealing with Moisture

48 Moisture Diffusion Simplified functional diagram No condensation Pleasant indoor environment

49 Dealing with Moisture on Site Irish Weather!

50 Dealing with Moisture on Site All external boards are fully impregnated Hygrophobic qualities Boards with T&G profiles enhance water resistance Can be left exposed up to 12 weeks!

51 Dealing with Moisture on Site

52 Training Essential

53 Fire Resistance

54 Fire Resistance Chars rather than melts Charring rate can be predicted Protects structural elements for longer periods High thermal mass inhibits heat penetration

55 Fire Resistance Test After 10 Minutes Temperature on reverse of Insulation: Woodfibre: Stonewool: 151 o F 502 o F

56 Fire Resistance on site Torch on flat roof membrane gone wrong!

57 Acoustic Insulation

58 Wood Fibre Acoustic Insulation High density Fibrous characteristics Tongued and Grooved joints further reduce sound transmission (more airtight) Effective airborne & impact sound resistance Acoustic solutions for Roofs, Walls and Floors

59 Sustainability

60 Environmental Sustainability Innovative and environmentally friendly manufacturing process Less additives Biologically harmless (natureplus -approved) Integrated quality and Environmental management system Raw material from sustainably managed forests Environmental Product Declaration (EPD s) documents available from some manufacturers

61 Environmental Sustainability Comparative_Study_of_Building_Materials,_Minka_McInerney 2011

62 Application on certified Passivhaus constructions in Ireland and the UK

63 Conventional Domestic Projects. Woodfibre on walls and roofs Domestic Buildings, Ireland

64 Non Domestic Projects Flimwell Studios, UK Buildings virtually all timber CLT Structure 100mm woodfibre on walls 142mm woodfibre on roofs

65 Non Domestic Projects Woodland Trust Headquarters, Grantham 282mm woodfibre on external walls 180mm woodfibre on roof RIBA Award 2011 BREEAM Excellent

66 Refurbishment projects

67 Refurbishment projects Warrenmount Convent, Dublin, Ireland Protected Structure, Heritage Building Hygrothermal modelling to assist confirm compatibility 80mm Woodfibre on inside of solid masonry walls

68 Refurbishment projects Indian Ambassador's Residence, Dublin, Ireland Mass concrete walls 200mm thick Built in 1930 s & featured modern architect of the time 140mm Woodfibre applied directly to the outside of solid walls

69 Sample Roof Assembly Pitched Roof Insulation From the inside: Internal Drywall boards 25mm Service batten Sealed Vapour Control Layer (e.g. pro clima INTELLO PLUS) 220mm Flexible woodfibre insulation between rafters 60mm Wood Fibre Softboard external insulation R value: ~ 36

70 Sample Wall Assembly Best Exterior Building Product 2013 From inside: Internal Drywall 60mm insulated service zone Pre-lined internal racking board 225mm Flexible woodfibre Insulation 80mm Wood Fibre Insulation 50mm Vented Cavity Timber Cladding U Value < 0.15 W/m 2 K

71 Wood Fibre Insulation Growth Total Woodfibre Insulation Sales Since 2012

72 Woodfibre Insulation Growth: Reasons Increasing legislative requirements for high thermal performance (EPBD) Environmental rating of building materials (BREEAM, LEED, DNGB, LBC) Development of Woodfibre technology and solutions Reduced costs as market volume & competition increases Raw material sourced from renewable resource with low embodied energy A closed loop life cycle. Cradle to cradle (Product easily recyclable & reused) Increased awareness regarding technical advantages

73 The Future: The Development of Woodfibre Insulation Pre-assembled window reveal boards Factory Applied Wood Fibre Insulation

74 The Future: The Development of Woodfibre Insulation Injected wood fibre insulation.

75 The Future: Educating Tomorrows Designers Colleges, Universities & Technical Academies Training Tomorrow s Architects & Trades People

76 Further Information:

77 Summary Whether in hot and cold continental European regions or in extreme damp/humid Ireland, woodfibre is tried, tested and works! Even after additional importation costs woodfibre use is growing in Ireland & the UK, in both domestic and non domestic buildings, new builds and refurbishment projects. Canada has the raw material, the tradition in timber construction & the expertise. Why not make it here?

78 Questions/ Comments? This concludes the: American Institute of Architects Architectural Institute of British Columbia Engineering Institute of Canada Continuing Education Systems Program Enhancing High Performance Building Assemblies: The Potential of Wood Fibre Insulation to Optimise High Performance Construction Ecological Building Systems Ltd ;