Institute for Environment and Development STØ

Flat roof case - Optiroc Finland/Fibo Exclay Eesti

1. Water barrier2. Concrete slab 30-40 mm or roofing slab made of LWA concrete slabs (60 x 250 x 600 mm)3. Waxed paper4. LWA insulation 360-450 mm, LWA fraction 8-20 mm5. Vapour barrier6. Load bearing construction

Institute for Environment and Development STØ

Purpose• Get to know our products better• Use the results to compare against our competitors (sales argument)• The study helps to protect the environment if the results are used in the company.• Support for marketing

Institute for Environment and Development STØ

FunctionThe function of the product is important for defining the functional unit. Following the LCA guideline, the function of the product was described as:

’to keep the roof watertight and insulate the construction with minimal maintenance requirements.’

The functional unit for this case is 1 m2 of a main roof construction, with a 100 year life.

Institute for Environment and Development STØ

The Flat Roof Life Cycle

Concrete

Vapour barrier

LWA

TRP lwa

Water barrier (Bitumen)

TRP bitumen

TRP concrete

Maintenance (life span 100 years)

Demolition

Flat main roof

Eaves

Ventilation Waxed paper

Replace bitumen 2 times

0,094%

0,094%

Not included

Not included

TRP to recyclingTRP to landfill

TRP to reuse

RecyclingLandfill

Reuse

Institute for Environment and Development STØ

The main ingredients of the roof

kg/m2% Cut-off criteria: < 1%

Vapour barrier 0,2 0,09 Not taken into considerationLWA 110,0 51,79Waxed paper 0,2 0,09 Not taken into considerationConcrete 92,0 43,31Water barrier 10,0 4,71

Total weight 212,4 100,00

Institute for Environment and Development STØ

Data usedRaw materials Bitumen Data from Eurobitume report 99/007, may 1999. Eco-

profile for Bitumen Production from Crude OilExtraction to a storage tank in a refinery.

Concrete Data from Finncement, production site Pargas.Production and emission figures from 1993. (STØ-project 1995).

LWA Data from production site Kuusankoski, 1999.Vapour barrier Assumed negligible.Waxed paper Assumed negligible.

Maintenance Maintenancebitumen

Replace water barrier, bitumen, 2 times (every 33year).

End of life Demolition No data.Recycling No emissions data, only quantity.Landfill No emissions data, only quantity of industrial waste.Reuse No emissions data, only quantity.

Transportation LWA Heavy goods vehicle, Finland*: >16 tonnes loadingcapacity. 130 km

Bitumen (waterbarrier)

Medium goods vehicle, Finland*: 7,5-16 tonnesloading capacity. 35 km

Concrete Medium goods vehicle, Finland*: 7,5-16 tonnesloading capacity. 20 km

* Heavy and medium goods vehicle , Finland based on emissions from Norwegian lorries in 1997 and Finland’sdiesel production and distribution. References: Norwegian pollution control authority (report 99:04, 1997 data) andEuropean commision, MEET project.

Institute for Environment and Development STØ

ResultsEnergy consumption for the main steps in the life cycle

Energy Consumption

0

100

200

300

400

500

600

700

800

Raw materialsproduction

Construction Use/ maintenance End of life Total

MJ

Bioenergy (recycled)

Fossil energy (recycled)

Hydropower (primary)

Bioenergy (primary)

Nuclear energy (primary)

Fossil energy (primary)

Institute for Environment and Development STØ

Energy consumption for raw materials production

Energy Consumption

0

100

200

300

400

500

600

LWA Bitumen Concrete

MJ

Bioenergy (recycled)

Fossil energy (recycled)

Hydropower (primary)

Bioenergy (primary)

Nuclear energy (primary)

Fossil energy (primary)

Institute for Environment and Development STØ

Global Warming Potential for the main steps in the life cycle

Global Warming Potential

0

10

20

30

40

50

60

70

Raw materialsproduction

Construction Use/ maintenance End of life Total

kg

CO

2-e

qu

iva

len

ts

CO2 from recycled energy carriers

CO2-equivalents

Institute for Environment and Development STØ

Global Warming Potential for raw materials production

Global Warming Potential

0

5

10

15

20

25

30

35

40

LWA Bitumen Concrete

kg C

O2-

eq

uiv

ale

nts

CO2 from recycled energy carriers

CO2-equivalents

Institute for Environment and Development STØ

Eutrophication and Acidification for the main steps in the life cycle

Eutrophication and Acidification

0,00

0,20

0,40

0,60

0,80

1,00

1,20

1,40

1,60

Raw materialsproduction

Construction Use/ maintenance End of life Total

Eutrophication, O2-equivalents

Acidif ication, SO2-equivalents

Institute for Environment and Development STØ

Eutrophication and Acidification for raw materials production

Eutrophication and Acidification

0,00

0,20

0,40

0,60

LWA Bitumen Concrete

kg

Eutrophication, O2-equivalents

Acidif ication, SO2-equivalents

Institute for Environment and Development STØ

POCP for the main steps in the life cycle

Photochemical Ozone Creation Potential (Smog)

0

5

10

15

20

25

30

35

Raw materialsproduction

Construction Use/ maintenance End of life Total

g e

the

ne

-eq

uiv

ale

nts

Institute for Environment and Development STØ

POCP for raw materials production

Photochemical Ozone Creation Potential (Smog)

0

2

4

6

8

10

12

LWA Bitumen Concrete

g e

the

ne

-eq

uiv

ale

nts

Institute for Environment and Development STØ

Waste production for the main steps in the life cycle

Waste

0

10

20

30

40

50

60

70

80

90

100

Raw materialsproduction

Construction Use/maintenance

End of life Total

kg

Industrial waste

Hazardous waste