Solco Gas Product Selector
Gas Protection Scoring
Building Types
What is Gas Protection?
Gas Characteristic Situations (CS)
Common Ground Gases

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Gas & Waterproof Product Selector

Radon
BRE211

Bulk Ground Gas to NHBC (Amber 1)

Carbon Dioxide & Methane
BS8485+A1:2019 (Amber 2)

Hydrocarbon / VOC
Vapours – C748

Hydrocarbon / VOC
Immersion – C748

Waterproof
to BS8102

Agrément Certificate
Solco TS Amber 1 Radon Membrane ✓ ✓ BBA
Solshield High Performance DPM ✓ BBA
Solshield Reinforced Gas Barrier ✓ ✓ BBA
Solshield Ultra Gas Barrier ✓ ✓ ✓ ✓ BBA
Solshield Flexible Hydrocarbon Barrier ✓ ✓ ✓ ✓ ✓
Solshield CT Bond Crystalline (NEW) ✓ ✓ ✓ ✓ ✓ ✓ BDA (Applied)
Solshield CT Bond Pre (NEW) ✓ ✓ ✓ ✓ ✓ ✓ BDA (Applied)
Solsheet Self-Adhesive Membrane ✓ ✓ ✓ BBA
Solsheet GR Self-Adhesive Membrane ✓ ✓ ✓ ✓ ✓ BBA
Solseal Flexible Liquid Membrane ✓ ✓ ✓
Solseal Liquid Gas Barrier ✓ ✓ ✓
Solseal PB-2K ✓ ✓ ✓ ✓ ✓ ✓
Solcourse HP DPC ✓ ✓ BBA
Solcourse GR DPC ✓ ✓ ✓ BBA
Solcourse 3S DPC ✓ BBA
Actitex Bentonite Membrane ✓ BDA

What is Gas Protection?

Note: BS8485:2015, Section 4

Protection from hazardous gases and other contaminants present in underlying soils, that can pose various risks to occupiers, and to the structures themselves if not managed. Gas protection measures are used to interrupt any possible gas ingress routes.

Protection measures should be:
  • Durable
  • Buildable
  • Effective
  • Robust
Key To Ingress Routes:

1. Through cracks in solid floors
2. Through construction joints
3. Through cracks in walls below ground level
4. Through gaps in suspended floors
5. Through cracks in walls
6. Through gaps around service pipes
7. Through cavities in walls

Key To Ingress Routes:

A. Wall cavities and roof voids
B. Beneath suspended floors
C. Within voids caused by settlement or subsidence
D. Drains and soakaways

Gas Characteristic Situations (CS)

Building Types

Source: BS 8485:2015
* Can have multiple types in one physical building.

  Type A Type B Type C Type D
Ownership Private Private Or Commercial/Public,

PossibleMultiple

 Commercial/ Public Commercial/

Industrial
Control (Change of use, Structural alterations, Ventilation) None Some but not all Full Full
Room Sizes Small Small/ Medium Small To Large Large Industrial/ Retail Park Style

Gas Protection Scoring

Source: BS 8485:2015

 Minimum Gas Protection Score (Points)
CS High Risk Medium Risk Low Risk
Type A Building Type B Building Type C Building Type D Building
1

2

3

4

5

6

 0

3.5

4.5

6.5A)

__B)

__B)

 0

3.5

4

5.5A)

6.5A)

__B)

 0

2.5

3

4.5

5.5

7.5

 0

1.5

2.5

3.5

4.5

6.5

A) Residential buildings should not be built on CS4 or higher sites unless the type of construction or site circumstances allow additional levels of protection to be incorporated, e.g. high-performance ventilation or pathway intervention measures, and an associated sustainable system of management of maintenance of the gas control system, e.g. in institutional and/ or fully serviced contractual situations.

B) The gas hazard is too high for this empirical method to be used to define the gas protection measures.

Common Ground Gases

Radon

Methane

  • Amounts to 50% of our annual radiation dose.
  • Present in all soil and rock.
  • 3.3% of all deaths from lung cancer are related to radon in the home.
  • A Colourless, Asphyxiating Gas.
  • Can produce Carbon Monoxide.
  • Forms highly flammable and potentially explosive mixtures in air, between 5% and 15%.

CarbonDioxide

Petroleum Hydrocarbon & VolatileOrganic Compound (VOC) Contamination

  • Causes Drowsiness, Unconsciousness and Cardiovascular Damage.
  • Classed as a ‘substance hazardous to health’ under the Control of
    Substances Hazardous to Health Regulations 2002 (COSHH).
  • Highly flammable and explosive.
  • Irritant and Asphyxiant.
  • Cause short-term and long-term health effects.

Radon

  • Amounts to 50% of our annual radiation dose.
  • Present in all soil and rock.
  • 3.3% of all deaths from lung cancer are related to radon in the home.

Methane

  • A Colourless, Asphyxiating Gas.
  • Can produce Carbon Monoxide.
  • Forms highly flammable and potentially explosive mixtures in air, between 5% and 15%.

CarbonDioxide

  • Causes Drowsiness, Unconsciousness and Cardiovascular Damage.
  • Classed as a ‘substance hazardous to health’ under the Control of
    Substances Hazardous to Health Regulations 2002 (COSHH).

Petroleum Hydrocarbon & VolatileOrganic Compound (VOC) Contamination

  • Highly flammable and explosive.
  • Irritant and Asphyxiant.
  • Cause short-term and long-term health effects.