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Wind Wash (Jargon Buster) G#14021

By 12 December 2016December 21st, 2016Code, Encyclopaedia, Entries, Jargon Buster
GBE Jargon Buster Collection A49 brm 061215

GBE > Encyclopaedia > Code > Jargon Buster > Entries > W > G#14021

Wind Wash (Jargon Buster)

Wind Wash (Jargon Buster)

GBE Jargon Buster


Wind Washing

When insulating properties of insulation are reduced or eliminated due to air-current penetration removing heat.
Boards above eaves insulation channelling ventilation air and preventing heat removal from insulation.
(Energy Star ’07 & NGS BRM ‘10)

Wind Washing

Air movement in cavities wall or in lofts, blowing over the air permable surface of thermal insulation, drawing heat out as ot passes.
Masonry cavity walls suffer especially with partial fill insulation batts made of mineral wool.
In Austria a membrane would be used in partial fill cavity wall insulation to reduce this method of heat less.
Low emissivity foil faced board insulation, Breather Membranes, Wind tightness layers and breathing sheathing boards can control heat loss from insulation subject to wind washing.
(NGS BRM ’10 – GBE BRM ’16)

Information sources:

  • Energy Star ’07
  • NGS BRM ‘10
  • GBE BRM ’16

Relevance to Environmental Construction:


  • Wind washing will increase the rate of heat loss from the building
  • Persistent wind washing may result in thermal bridges through the insulation
  • Persistent thermal bridges will create conditions for interstitial or surface condensation
  • Interstitial condensation can initiate rot in any embedded timbers


  • Surface Condensation can initiate ever present spores into life and development of mould
  • Mould can create respiratory illness, asthma,
  • Toxic Mould can lead to unusable buildings, loss of possessions, loss of home and death.




© GBE NGS ASWS BrianSpecMan aka Brian Murphy
12th December 2016

Wind Wash (Jargon Buster)

GBE JargonBusterCollection A49brm061215

© GBE NGS ASWS BrianSpecMan aka Brian Murphy
12th December 2016

Wind Wash (Jargon Buster)
See Also:

GBE Jargon Buster

Jargon Buster Themes G#1333 N#1320


  • K43 Raised Storage/Access Systems
  • P10 Sundry Insulation/Proofing/Fire stops
  • P14 Air/Wind tightness systems

Initial, Abbreviations & Acronyms

  • ATL
  • BM
  • BRM
  • OSB
  • VCL

Words & Phrases

  • Air tightness layer (ATL)
  • Breather membrane
  • Breathable Roofing Membrane (BRM)
  • Breathing Sheathing Insulating Board
  • Cement Particleboard
  • Chipboard
  • Conductivity
  • Conduction Thermal Insulation
  • Decrement Delay
  • Emissivity
  • Energy
  • k value
  • Loft
  • Loft Insulation
  • Orientated Strand Board (OSB)
  • Overheating
  • Plywood
  • Wood Particleboard
  • Radiant Thermal Insulation
  • Raised storage/access systems
  • R value
  • Thermal Break (Jargon Buster) G#9357
  • Thermal Bridge (Jargon Buster) G#9351
  • Thermal Bypass
  • Thermal Flanking
  • Thermal Insulation
  • Timber Panel Product
  • U Value
  • U Value Envelope
  • Vapour Check Layer (VCL)
  • Wind Wash (Jargon Buster) G#14021 (this page)

GBE Shop

GBE Checklist

GBE Defects

GBE Issue Paper

GBE Links

  • Organisation/Website

GBE Calculator

  • Loft Insulation U value calculator
  • Raised Storage/Access platform support thermal bridge Psi calculator

GBE Green Building Specifications

Robust Specification Clause


GBE Shop


Manufacturer’s CPD

© GBE NGS ASWS BrianSpecMan aka Brian Murphy
12th December 2016 – 21st December 2016

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