Prefabricated hempcrete specification and installation manual 2016 by studio green pte ltd

Our product designers are architects and engineers contactable at www.studiogreen.sg or email info@studiogreen.sg
CONSTRUCTION DETAILS
Prefabricated Hempi Building Products
APPLICATION
HempiPANEL for external wall
HempiBLOCK for external wall
Hempi for internal wall
Other construction detailing
Studio Green Pte Ltd
Other products such as:
 Hemp Wall Boards
 Hemp Ceiling
 Cast In-Situ construction
manual available upon
request.

Construction Details
Prefabricated Hemp Building Products Hempi  Contact to enquire: info@studiogreen.sg 1
This is a property of Studio Green Pte Ltd and no reproduction is allowed unless authorised by Studio Green Pte Ltd to serve as consigned project reference.
General Conditions
Please note that following construction drawings are based on conventional building practices, good design
practices, in readily available equipment and tools. However, construction practices may defer in different regions.
Check with your local builder if there are more efficient alternative methods of construction.

APPLICATION
HempiPANEL – for external and internal walls
PRODUCT SPECIFICATION – LARGE PANEL & MINI PANEL
Full Wall Size: 2,800mm(H) x 600mm(W) x 100mm(THK)
Mini Panel Size: 1,200mm(H) x 600mm(W) x 100mm(THK) or 600mm(W) x
600mm(H) x 100mm(THK)
Form: Tongue & Groove profile modules
Colour: Light beige natural woody colour exposing hemp raw material. Options
to varied colours with use of eco-friendly pigments are available upon request
Finished texture: Smooth matt finish exposing random hemp fibre fines.
Options of varied textures and patterns upon request.
OPTIONAL - YOUR DESIGNED FINISHES (recommended that all surfaces should
be breathable for good indoor air quality and prevention of fungal growth)
External:
1. Paint Finish: Apply lime plaster (~20mm) and let dry, followed by
breathable base coat for paint (eg. mineral silicate paint) and paint
finish (in process as recommended by paint supplier)
2. Cladding Finish in Stone, Tiles, Timber, Metal Cladding, etc: Sub-frame
supports for additional cladding finish should be provided
independently and secured to building structural frames.
Internal:
1. For Dry Areas with Paint Finish: Apply lime plaster (~20mm) and let dry,
followed by breathable base coat for paint (eg. mineral silicate paint)
and paint finish (in process as recommended by paint supplier)
2. For Wet Areas with Tile Finish: Waterproof plasterboards, gypsum
boards, magnesium oxide Boards, etc can be directly adhered to
HempiPANEL walls with adhesives and nails. Thereafter, recommended
waterproofing layer and desired finishing cladding to be adhered to
board substrates (in process as recommended by material supplier).
Project Example
PERFORMANCE SPECIFICATION
Strength and Performance
Density: 800kg/m3
Compressive Strength (BS EN 12390-5:2009): 1.8 MPa
Flexural Strength (BS EN 12390-5:2009): 0.08 N/mm2
Stiffness Impact (SS 492:2001/BS 5234): certification in progress
Fire Properties
Non-Combustibility (BS 476, Part 4, 6, 7): Non-Combustible
Fire Resistance (BS 476, Part 22): certification in progress
Classification Reaction to Fire (EN 13501-1: 2007): certification in progress
Thermal Properties
Thermal Conductivity (ASTM C 518:2010): 0.178 W/mK
Thermal Resistance (ASTM C 518:2010): 0.330 m2K/W
U-value (200mm thk unplastered finish): 0.78W/m2K
Acoustical Properties
Sound Transmission (ASTM E90-2004): ST C39
Moisture Related Prpoerties
Water Absorption (BS EN 1609): 8.04kg/m2
Water Vapour Transmission (ASTM E96): 1.72ng/Pa.s.m
Moisture Movement (ASTM C1185): 0.05%
Non-Hazardous Chemical Analysis
TVOC Emission (ASTM 5116): Not Detected, Passed
Formadehyde Emission (ASTM 5116): Not Detected, Passed
Total Phthalates (ASTM 5116): Not Detected, Passed
Non-Toxicity (ASTM 5116): Not Detected, Passed
THC Level: Not Detected, Passed

Vertical Wall Panels
1. HempiPANEL Wall Panels
2. Lime Mortar Bed (~10mm)
3. Lime Plaster
4. ‘L’ Plate Channel (anchor array
of HempiPANELs to structural
framing)
5. Interior Wall Finish
6. ‘Z’ Furring Angle (anchor array
of HempiPANELs to structural
framing)
7. Ceiling Board
8. Roof Structure (by engineer)
9. ‘Z’ Furring Angle running
throughout panels with
minimum 2 nos. M6 screws
(anchor array of HempiPANELs
to structural framing)
10. External HempiRENDER
finishing (or other finishes as
designed)
‘L’ Plate Channel
Notes:
1. Use Lime Mortar at all
vertical joints between
panels.
2. Immediately after erection
install minimum of (2)
corrugated nails per panel
joint.

‘Z’ Furring Angle
1. Roof Panel with
Waterproofing and
Insulation
2. HempiPANEL Wall Panels
3. HempiBLOCK Parapet Wall
5. Felt Layer
6. Dowel (Drill and Epoxy as
required)
7. Reinforcing Bar in Grout
Filled Key Joint
8. Bond Beam with Reinforcing
Bars
9. Reinforced Concrete Slab
10. ‘L’ Plate Channel (anchor
array of HempiPANELs to
structural framing)
12. Ceiling Board
14. Wire Mesh at Wall
Discontinuities
15. Parapet Flashing
16. Fasteners
10

opening details
1. HempiPANEL Vertical Wall
Panel
2. Concrete Slab
4. Reinforcing Bar in Grout
Filled Key Joint
required) or Wall Strap
Anchors at Openings
6. Steel or Concrete Bracing
Columns at 4m intervals
(approximately at 100mm x
100mm for concrete or
75mm x 75mm for steel)
7. Steel or Concrete Lintel
8. HempiRENDER finishing or
HempiBOARD to match
9. Steel Frame
10. Backer Rod (if required) with
sealant
11. Sealant (at all vertical and
horizontal joints to be
sealed)
12. Grout
Vertical Panel Elevation
PLAN VIEW W/ CONCRETE COLUMNS
PLAN VIEW W/ STEEL ‘I’ COLUMNS
6
6
4,000mm
7
8
9
11
11
12
9
12
10

fixed glazing detail
1. Roof Panel with
Waterproofing and
Insulation
2. Concrete or Steel Lintel
3. HempiPANEL Wall Panel
4. HempiBLOCK or HempiPANEL
as roof parapet
5. Precast Concrete Sill
6. Felt Layer
required)
structural framing)
9. Reinforced Concrete Beam
Structure
11. Ceiling Board
Discontinuities finished with
External HempiRENDER
designed)
14. Window Glazing
15. Steel or Concrete Bracing
Columns at 4m intervals
(approximately at 100mm x
100mm for concrete or
75mm x 75mm for steel)
15
4,000mm 2

window glazing detail
2. Window Glazing
3. Fastener
4. Interior Wall Finishing or
Drywall Board (if required)
5. External Hemp Lime Render
(or other finishes as
designed)
6. Window Glazing Frame
7. Masonry Anchor or Dowel
(aligned to panel joints)
8. Grout Filled Hollow Metal
wrapped around Window
Glazing Frame (and as lintel
at window head)
9. Steel or Concrete Lintel

corner wall details
structural framing)
3. Screw M6 nails
4. HempiPANEL Corner Panel
(installed from Inside with
one side of HempiPANEL
uninstalled for access)
5. Movement joint in Lime
Mortar (if required)
6. Corner Bead Finished with
External HempiRENDER to
match (where there is
external renderimg)

Block Adhesive or Lime Mortar
Application
HempiBLOCK – for external and internal walls
PRODUCT SPECIFICATION
Standard Size: 390mm(L) x 100mm(W) x 190mm(H)
Sizes vary depending on type of hemp block
Form: Solid or Hollow block modules
Colour: Light beige natural woody colour exposing hemp raw material.
Options to varied colours with use of eco-friendly pigments are available upon
request
Finished texture: Smooth matt finish exposing random hemp fibre fines. Options
of varied textures and patterns upon request.
PERFORMANCE SPECIFICATION
Strength and Performance
Density: 800kg/m3
Compressive Strength (BS EN 12390-5:2009): 1.8 MPa
Flexural Strength (BS EN 12390-5:2009): 0.08 N/mm2
Stiffness Impact (SS 492:2001/BS 5234): certification in progress
Fire Properties
Non-Combustibility (BS 476, Part 4, 6, 7): Non-Combustible
Fire Resistance (BS 476, Part 22): certification in progress
Classification Reaction to Fire (EN 13501-1: 2007): certification in progress
Thermal Properties
Thermal Conductivity (ASTM C 518:2010): 0.178 W/mK
Thermal Resistance (ASTM C 518:2010): 0.330 m2K/W
U-value (200mm thk unplastered finish): 0.78W/m2K
Acoustical Properties
Sound Transmission (ASTM E90-2004): ST C39
Moisture Related Prpoerties
Water Absorption (BS EN 1609): 8.04kg/m2
Water Vapour Transmission (ASTM E96): 1.72ng/Pa.s.m
Moisture Movement (ASTM C1185): 0.05%
Non-Hazardous Chemical Analysis
TVOC Emission (ASTM 5116): Not Detected, Passed
Formadehyde Emission (ASTM 5116): Not Detected, Passed
Total Phthalates (ASTM 5116): Not Detected, Passed
Non-Toxicity (ASTM 5116): Not Detected, Passed
THC Level: Not Detected, Passed
Or
Or
Mockup Wall Example
OPTIONAL - YOUR DESIGNED FINISHES (recommended breathable surfaces)
External:
1. Paint Finish: Apply lime plaster (~20mm) and let dry, followed by breathable
base coat for paint (eg. mineral silicate paint) and paint finish (in process as
recommended by paint supplier)
2. Cladding Finish in Stone, Tiles, Timber, Metal Cladding, etc: Sub-frame
supports for additional cladding finish should be provided independently and
secured to building structural frames.
Internal:
1. For Dry Areas with Paint Finish: Apply lime plaster (~20mm) and let dry,
followed by breathable base coat for paint (eg. mineral silicate paint) and
paint finish (in process as recommended by paint supplier).
2. For Wet Areas with Tile Finish: Waterproof plasterboards, gypsum boards,
magnesium oxide Boards, etc can be directly adhered to HempiPANEL walls
with adhesives and nails. Thereafter, recommended waterproofing layer and
desired finishing cladding to be adhered to board substrates (in process as
recommended by material supplier).

Full Block
1. HempiBLOCK Full Block
2. Concrete Beam with
Reinforcements (by engineer)
3. Ceiling Board
6. ‘L’ Plate Channel with
watertight sealant
7. Internal Wall Finish
8. Floor Structure (by engineer)
Discontinuities
10. Steel ‘L’ Channel Angles
11. Floor Slab
12. Roof Structure (by engineer)

1. Concrete Filled HempiBLOCK
‘U’ Lintel with
Reinforcements
3. Reinforced Concrete Lintel
4. Door Head
5. Door Jamb
6. Exterior Door
7. Threshold
9. Roof Structure
10. Roof Structure Anchor (by
engineer)
12. Ceiling Board
13. External Hemp Lime Render
(or other finishes as
designed)
14. Fasteners
15. Timber Pressure Treated Buck
Strip to anchor door frame to
wall
Door Section

1. Concrete Beam with
Reinforcements (by engineer)
3. Reinforced Concrete Lintel
6. Window
7. Roof Structure
8. Roof Structure Anchor (by
engineer)
10. Corner Bead
11. Pressure Treated Buck Strip
for mounting window frame
12. Interior Window Sill
13. Precast Concrete Sill
14. Ceiling Board
15. External HempiRENDER
designed)
16. Hemp Insulation Board (if
required)

For Interior Walls
1. HempiPANEL or HempiBLOCK
3. Movement joint in
Polyurethane Foam (~25mm
vegetable oil based if
required)
4. Lime Mortar (~10mm)

For Interior Walls
2. Concrete Filled HempiBLOCK
‘U’ Lintel with Reinforcements
3. ‘L’ Bracket
4. Lime Mortar Joint (optional:
Corrugated Nails between 2
panels or blocks)
Corrugated Nail

For Interior Walls
3. Plumbing Stack
4. Plumbing Supply Lines
5. Aluminium stud or hollow
section to secure waterproof
drywall panel to hemp wall
6. Waterproof drywall panel
(plasterboard, gypsum,
calcium silicate, etc)
7. Lime Mortar Joint
8. Polyurethane Foam (~5mm
vegetable oil based)

For Interior Walls
3. Electrical Chase (~40mm
deep)
4. Wire
5. Backer Rod
6. Electrical Outlet Box
7. Lime Plaster
8. Pressure Treated Furring
Strips
9. Lime Plaster or Waterproof
board for Wet Areas
(plasterboard, gypsum,
calcium silicate, etc)
Electrical w/Panel

2. Aluminium or Galvanised
Steel Subframe to secure top
hung cabinets
3. Floor mounted cabinet can be
secured to hemp wall with
Concrete Masonry
Compatible Fasteners (see
fasterners section)
4. Bolting of Subframe of
cabinets to the floor

For Exterior & Interior
Walls
Corrugated Nail for additional
fastening details between
external HempiPANELs
(optional if additional finishing
render is applied)
1. Galvanised metal stud or pressure
treated buck strip with adhesive
caulk or sealant and pneumatic
nails
2. Install exterior and interior door
jamb as per door manufacturer’s
specifications
3. Fasten interior trim with
pneumatic nails
4. Trim out moulding (if required)
1. Galvanised metal stud or pressure
treated buck strip with adhesive
caulk or sealant and pneumatic
nails
2. Install interior door jamb as per
manufacturer’s specifications
3. Fasten interior trim with
pneumatic nails
1. Galvanised steel or pressure
treated buck strip with pneumatic
nails
2. Install window to buck strip as per
manufacturer’s specifications
(Note: furring strips for gypsum board
should be secured as per item 1.)
1. Pneumatic nails

Hemp Boards or Hemp Ceilings
Standard Size: 600mm(L) x 450mm(W) x
12mm(THK)
Options to custom panel sizes are available
upon request
Colour: Light beige natural woody colour
exposing hemp raw material. Options to varied
colours prints or cut-out available.
Finished texture: Smooth matt finish exposing
random hemp fibre fines.

Please Contact Our Licensed Contractor and Supplier, Worldbiz Venture Co. Ltd, for Training or Workshops on Best
Practice Hemp Building Construction
MATERIAL COMPOSITION
HempiCAST is a bio-composite premix material, ideal as an insulated wall solution for low-rise external walls in
extreme climatic conditions. It can also be applied as acoustic internal walls. Mixing our specially selected hemp hurd
and formulated lime based binder, the designer has the flexibility to vary finishing texture (based on formwork
used), colour hue of wall (by adding inorganic pigments), or lime plaster and paint (with breathable paint eg. mineral
silicate) to their desired wall design effect.
Illustration images of cast in-situ with HempiCAST (mixing packs of HempiHURD and HempiBIND)
CAST IN-SITU CONSTRUCTION METHOD
Formwork shuttering boards can be in whatever available resource in the region. Ideal for hard to reach site with
available workers. Skills, tools and equipment required for cast in-situ method is quite similar with concrete material.
Except that instead of using concrete mixer, Pan Mixer with rotary blades is more ideal. Also, additional tamping
process to compact the poured HempiCAST mix into formwork is required. Formwork can be removed after 24hours
where casted hemp wall shall be left curing under shelter protection from rain.
We can provide training workshops of building demonstration to the project builders or contractor teams upon
request.
Standard Size: In premix packs of HempiHurd and
HempiBind
Colour: Light beige natural woody colour exposing hemp
raw material. Options to varied colours with use of eco-
friendly pigments are available upon request
Finished texture: HempiCast wall finish can be as left as
finished surface or rendered with lime wash render or lime
plaster with breathable paint (eg. Mineral silicate paint)

Prefabricated hempcrete specification and installation manual 2016 by studio green pte ltd

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