SmallCarbon®: carbon assessment for small practices

Build-up

External wall, timber frame

Layer	mm	kgCO₂e/m²
Timber cladding	20	2.9
Battens	25	0.6
Wood fibre board	60	5.8
Total	105	9.3

Carbon by layer

9.3

kgCO₂e/m² of wall

Upfront carbon

0

kgCO₂e/m² · A1-A5

Embodied carbon

0

kgCO₂e/m² · A-C, without B6 and B7

Whole life carbon

0

kgCO₂e/m² · A-C, with B6 and B7

Upfront carbon

By building element

Upfront carbon, kgCO₂e/m²

Option A and Option B

Product (A1-A3)
Transport (A4)
Construction (A5)

Option B against Option A

0% lower

Timber frame in place of steel

Option	Frame	kgCO₂e/m²
Option A	Steel frame	0
Option B	Timber frame	0

What a report must state

RICS asks a report for each item (sections 1.7 and 6.1.1).

Item	Status
Date of assessment	Suggested
RIBA stage	Suggested
Reference study period	Suggested
Gross internal area	Suggested
Sources of data	Suggested

Issued

A copy of the version as it was reported. It is never changed.

Nothing issued yet

Issue the assessment to keep a copy of it as it is reported.

Build up each element from a library of materials.

Try it

Change the design and watch the carbon move.

A primary school extension

Choose how four of its elements are built.

Ground floor

Structure

External walls

Windows

Upfront carbon

421kgCO₂e/m²LETI C

Where the design starts.

Ground floor
Structure
External walls
Roof
Windows
Internal walls

Example figures, per m² of floor area. The lines are the targets the app draws on a school’s charts.

Created by Studio Bark and Looper

With thanks to the practices and people who backed SmallCarbon® before launch.

Sponsor practices

Hayhurst and Co
Tuckey Design Studio
Artel31
architecture:wk ltd
Barc architects
Charlie Luxton Design
Louise Crossman Architects
Woodrow Vizor
Ashworth Parkes Architects
Ann Nisbet Studio

Supporters

Mhairi GrantPaper Igloo
Albane Duvillierhouseofbricoleurs
Gloria LoOiSA Designs

Measure embodied carbon as you design

Try it

Created by Studio Bark and Looper