A Comparison of Life Cycle Impact of Mass Timber and Concrete in Building Construction

Table 3.

Material groups 1, 2 & 3 for the LCA for the threebuilding scenario.

Material

Unit

Material group 1

Material group 2

Material group 3

#15 Organic Felt

m2

889.23

889.23

889.23

8" Normal Weight Concrete Block

Blocks

2100.83

-

-

Aluminum Window Frame

kg

76.55

76.55

76.55

Ballast (aggregate stone)

kg

7445.45

7445.45

7445.45

Blown Cellulose

m2 (25mm)

311.63

311.63

311.63

Cold Rolled Sheet

Tonnes

0.03

-

-

Concrete Benchmark CAN 25 MPa

m3

6.27

6.27

6.27

Concrete Benchmark CAN 30 MPa

m3

61.34

35.26

35.26

Cross Laminated Timber

m3

-

14.39

14.39

Concrete Brick

m2

168.07

-

-

Expanded Polystyrene

m2 (25mm)

24.89

24.89

24.89

Galvanized Sheet

Tonnes

0.22

0.22

0.22

Glass Fibre

kg

315.00

315.00

315.00

Glazing Panel

Tonnes

0.36

0.36

0.36

GluLam Sections

m3

-

6.97

-

Grout-Coarse

m3

6.73

-

-

Hollow Structural Steel

Tonnes

-

0.16

0.16

Laminated Veneer Lumber

m3

0.33

0.33

6.68

Mortar

m3

6.78

-

-

Nails

Tonnes

0.12

0.12

0.12

Precast Concrete

m3

11.21

11.21

11.21

Rebar, Rod, Light Sections

Tonnes

5.80

0.41

0.41

Roofing Asphalt

kg

4997.69

4997.69

4997.69

Screws Nuts & Bolts

Tonnes

-

0.02

0.02

Small Dimension Softwood Lumber, kiln-dried

m3

4.05

4.05

4.05

Softwood Plywood

m2 (9mm)

172.42

172.42

172.42

Solvent Based Alkyd Paint

L

2.72

2.72

2.72

Spruce Wood Bevel Siding

m2

-

422.57

422.57

Type III Glass Felt

m2

1778.46

1778.46

1778.46

Water Based Latex Paint

L

-

227.26

227.26

Welded Wire Mesh / Ladder Wire

Tonnes

0.34

0.34

0.34

Total mass value

Tonnes

312.26

150.45

155.08