Thermal Bridge (Jargon Buster) G#9351

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Thermal Bridge (Jargon Buster)

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18/01/16: Thermal Bridge (Jargon Buster) G#9351
18/01/16: Started adding Jargon Buster Pages using tabbed template
17/01/16: Tabbed Jargon Buster Template developed with ESWITB content.

Thermal Bridge

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Thermal Bridge
1 Definitions

Thermal Bridge

Unwanted heat loss or gain occurs due to conduction through a material.
This can lead to significant energy losses and may also result in the build up of condensation.
An example of thermal bridging is heat loss that occurs due to metal wall ties or steel framing that is insufficiently insulated between areas of temperature differences
e.g. the internal and external environment.
(based on Ecos Renews 17)

Thermal Bridge

A thermally conductive material which penetrates or bypasses an insulation system; such as a wall tie, metal fastener, concrete beam, slab or column.
Thermal bridging lowers the overall thermal insulation of the structure by creating areas where heat loss is greater in one area than it is for another.
The effect is to reduce the overall U value of the construction element.
The heat loss per unit length of thermal bridge is known as the Ψ-(psi) value and is measure in W/mK.
(GreenSpec AEP ’09)

Thermal Bridge

Heat loss through a localized area where the primary insulation layer is significantly interrupted or reduced.
Difficult but not impossible to treat in solid wall insulation (SWI).
Become more significant where the building fabric has been upgraded.
Effects of a cold bridge:
- Rise in heat energy demand
- Indoor surfaces at lower winter temperatures
- Increased risk of surface condensation
- Risk of damages to building units, leading to vacancies & rehousing costs
- Danger of mildew, causing serious health threats, potential litigation
- Complaints, withheld payments, reputation damage
  (ESLtd. LB ’12)

Thermal Bridge

Heat loss through a localized area where the primary insulation layer is significantly interrupted or reduced in thickness or reduced in resistance to conductivity.
Previously known as a cold bridge, but from the outside an ‘anomaly’ in an IRT survey will be a ‘hot spot’ and from inside it will be a ‘cold spot’, hence thermal bridge.
Can be a continuouse support angle or multiple ties, fixings or fastenings at close centres providing a conductivity route through an insulation layer.
Their impact becomes more significant when the buildings U value is improved generally but the thermal bridge remains unresolved.
Effects of a thermal bridge:
- Rise in heating energy demand during heating season
- Internal surfaces of external wall, roof or floor at localised lower temperatures in heating season
- Increased risk of localised surface or intersticial condensation
- Danger of mildew and mould growing in condensate causing serious health risks
- Risk of damage to building fabric due to rot in timbers and frost damage in masonry
- Complaints, withheld payments, rehousing costs, vacancies, potential litigation, reputation damage.
(GBE BRM ’16)

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Thermal Bridges
2 Images/Icons

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Jargon
3 Relevance to Environmental Construction

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Jargon
4 Opinion

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Jargon
5 Examples

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Jargon
6 Notes

[/tab][tab title=”7 Sources *” id=”1453107669121-4″ tab_id=”1453134331248-5″]

Thermal Bridge
7 Sources

Ecological Building Systems ’09
Energy Star ’07
Enviroform Solutions Ltd. LB ‘12
GreenSpec AEP ’09
GBE BRM ’12-’16
NGS BRM ’09-‘12
SEDA Airtightness Guide definition

[/tab][tab title=”8 Related Jargon *” tab_id=”1453134331385-4″ id=”1458766739752-9″]

Thermal Bridge
8 Related Jargon

GBE Jargon Buster

G#9351 Thermal Bridge (JB) (This page)
G#4178 GBE Jargon Buster Navigation
G#1330 GBE Jargon Buster Themes
- Overheating
- Refurbishment/Retrofit
- Thermal Bridges/Breaks
G#685 N#707 GBE Jargon Buster Navigation: Abbreviations + Acronyms
- BM
- BRM
- CIGA
- ECO
- EIRS
- ESWI
- ETAG 004
- EITIC
- ETICS
- EWI
- EWIS
- HTT
- ISWI
- IWI
- NIA
- SWI
- TSB
GBE Jargon Buster Classifications
- K10 Plasterboard dry linings/partitios/ceilings
- K11 Rigid sheet flooring/sheating/decking/ sarking/lining/casings
- K13 Rigid sheet fine linings/paneling
- K20 Timber board flooring/decking/sarking/lining/casing
- K21 Timber strip/board fine flooring/linings
- M21 External Insulation with Rendered Finish
- P10 Sundry insulation/proofing work/fire stops
N#721 GBE Jargon Buster Numbers
N#705 Jargon Buster Words and Phrases
- Building Specific Insulation Solutions
- External Insulated Render Systems (EIRS)
- External Thermal Insulation Composite Systems (ETICS)
- External Wall Insulation (EWI)
- External Wall Insulation Systems (EWIS)
- GreenDeal
- Hard To Treat (HTT)
- Hydro-
- Hydrophobic Material
- Hygro-
- Hygroscopic
- Hygroscopic Material
- Hygroscopicity
- Hygroscopicity And Moisture Mass
- Hygrothermal Performance Testing
- Interstitial Condensation
- Internal Solid Wall Insulation (ISWI)
- Internal Wall Insulation (IWI)
- Moisture Transport
- Overheating
- Path Of Least Resistance
- Refurbishment
- Retrofit
- Retrofit Health & Safety
- Risk Assessment
- Solid Wall Insulation (SWI)
- Solid Wall Insulation Guarantee Agency (SWIGA)
- Thermal Breaks
- Thermal Bridges
- Thermal Laminates
- Thermal Looping
- Vapour Control Layer (VCL)

[/tab][tab title=”9 Checklists” id=”1453108204118-3″ tab_id=”1453134331520-8″]

Thermal Bridges
9 Checklists

GBE Checklist

G#606 N#627 GBE New Build Checklist Navigation

K10 Plasterboard dry linings/partitios/ceilings
K11 Rigid sheet flooring/sheating/decking/sarking/lining/casings
K13 Rigid sheet fine linings/paneling
K20 Timber board flooring/decking/sarking/lining/casing
K21 Timber strip/board fine flooring/linings
M21 External Insulation with Rendered Finish
P10 Sundry insulation/proofing work/fire stops

G#730 N#752: GBE EBC Checklist Refurbishment

K10 Plasterboard dry linings/partitios/ceilings
K11 Rigid sheet flooring/sheating/decking/sarking/lining/casings
K13 Rigid sheet fine linings/paneling
K20 Timber board flooring/decking/sarking/lining/casing
K21 Timber strip/board fine flooring/linings
M21 External Insulation with Rendered Finish
P10 Sundry insulation/proofing work/fire stops

G#1253 N#1252: GBE EBC Checklist Refurbishment Decent Homes

G#1438 N#1408 GBE Home Improvement Index

[/tab][tab title=”10 Q and A *” tab_id=”1453134331653-2″ id=”1453140308323-9″]

Thermal Bridge
10 Q and A

GBE Q&A

G#8288 Rendering system on existing insulated cavity wall
G#1803 N#1690 Thermal insulation of existing timber stud external walls

[/tab][tab title=”11 Defects/Solutions *” tab_id=”1453134331780-1″ id=”1453136831515-8″]

Thermal Bridge
11 Defects/Solutions

GBE Defects

External Wall Insulation: Insulation with Rendered Finish
G#9244 External Solid Wall Insulation and Thermal Bridges
G#9255 External Solid Wall Insulation Thermal Bridges Executive Summary
GreenDeal & ECO failings

GBE Solutions

External Wall Insulation: Insulation with Rendered Finish
G#9244 External Solid Wall Insulation and Thermal Bridges
G#9255 External Solid Wall Insulation Thermal Bridges Executive Summary

[/tab][tab title=”12 CPD/Lectures *” tab_id=”1453134331909-9″ id=”1453140308367-5″]

Thermal Bridge
12 CPD/Lectures

GBE CPD

Theme

G#472 N#478 GBE CPD Topics Navigation

Handouts PDF 9 slides/page for printing

Tech+Env2(21)MasonryExtWalls9

Seminars PDF for viewing

(21)MasonryExtWalls

GBE Lectures

N#216: (21) Masonry External Walls (P)

[/tab][tab title=”13 Media Links *” id=”1453108507155-1″ tab_id=”1453134332040-6″]

Thermal Bridge
13 Media Links

eBook Product Literature

EWI – Cold bridging & Weathering Solutions Product Guide
http://library.myebook.com/UBM/enviroform/176/

Presentation

How well insulated are our homes?
https://prezi.com/dlmqm33k8vgn/copy-of-introducing-enviroform-solutions/

Video

Wall Insulation: Thermo-soc. Prevents heat loss through sockets.
https://www.youtube.com/watch?v=i1k30yLyHE8

[/tab][tab title=”14 Links *” tab_id=”1453134332178-7″ id=”1453136831578-0″]

Thermal Bridge
14 Links

See: Passipedia: Thermal bridge
(NGS BRM ‘11)

[/tab][tab title=”15 Products *” tab_id=”1453134332309-10″ id=”1453140308435-7″]

Thermal Breaks
15 Products

See Tabs 16 Accessories and 17 Systems

[/tab][tab title=”16 Accessories *” tab_id=”1453134332440-6″ id=”1458766740102-1″]

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