GB2155968A - Condensation drainage - Google Patents

Condensation drainage Download PDF

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Publication number
GB2155968A
GB2155968A GB08406853A GB8406853A GB2155968A GB 2155968 A GB2155968 A GB 2155968A GB 08406853 A GB08406853 A GB 08406853A GB 8406853 A GB8406853 A GB 8406853A GB 2155968 A GB2155968 A GB 2155968A
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GB
United Kingdom
Prior art keywords
wall
insulation material
frame
slabs
cavity
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
GB08406853A
Other versions
GB8406853D0 (en
GB2155968B (en
Inventor
John Keen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Am & S Europ
Original Assignee
Am & S Europ
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Am & S Europ filed Critical Am & S Europ
Priority to GB08406853A priority Critical patent/GB2155968B/en
Publication of GB8406853D0 publication Critical patent/GB8406853D0/en
Publication of GB2155968A publication Critical patent/GB2155968A/en
Application granted granted Critical
Publication of GB2155968B publication Critical patent/GB2155968B/en
Expired legal-status Critical Current

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Classifications

    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04BGENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62Insulation or other protection; Elements or use of specified material therefor
    • E04B1/70Drying or keeping dry, e.g. by air vents
    • E04B1/7069Drying or keeping dry, e.g. by air vents by ventilating

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Building Environments (AREA)

Abstract

A building having a metal frame (1) is insulated externally of the frame by batts or slabs of essentially vapour-impermeable insulation material (3), which is provided with ventilation channels (6) which slope downwardly from the inner surface to the outer surface of the material. Thus water vapour is able to flow from the frame to an outer cavity (4) but water is prevented from running from the cavity to the frame. <IMAGE>

Description

SPECIFICATION Improvements in or relating to metalframed buildings This invention relates to metal-framed buildings and more especially to steel-framed domestic buildings.
The problem of keeping structural steelframes warm and of avoiding condensation on such frames is set out in U.K. patent specification 2,11 9,828A published in November 1 983. This specification also offers one solution to these problems, using moisture-permeable external insulation.
However where the external steel-frame insulation is in the form of batts or slabs of essentiaily moisture impermeable foamed plastics material e.g. faced closed-cell polyurethane foams, the solution proposed in the above specification is not applicable.
We have now devised a solution to the problems referred to above for the case where the external insulation material is substantially impermeable to water vapour.
This invention consists in a wall for a metalframed building in which substantially watervapour-impermeable insulation material is applied to the exterior of the metal frame and this material is separated by a cavity from an outer cladding wall, characterised in that the impermeable insulation material is provided with ventilation channels of controlled width, these channels sloping downwardly from the interior to the exterior surfaces of the insulation material.
Preferably the ventilation channels run substantially horizontally across the layer of insulation material.
Preferably the width of the channels is between 1 and 5mm.
Preferably the external insulation material is in the form of slabs or batts of closed-cell foamed plastics material and the vertical joints between the slabs or batts are butted together and sealed.
Preferably the downward slope of the channels from interior to exterior surfaces of the insulation is at an angle of at least 5" to the horizontal, more preferably at least 10 to the horizontal.
The invention will be further described with reference to the accompanying single figure of diagrammatic drawing which represents a section through a wall according to the invention as cut by a vertical plane at right angles to the wall.
As can be seen the steel frame 1 is sandwiched between an inner layer of plasterboard 2-2 and an outer layer of slab foamed insulation material 3, the latter being separated, by a cavity 4 from an outer cladding wall of brick or block material 5. According to the invention the insulating slab material is provided with ventilation channels 6 which run substantially horizontally along the slabs but are angled, in section, so that there is a downward slop from the inner to the outer surfaces of the slab. This angle is sufficient to prevent the flow of liquid moisture from the cavity to the steel frame but acts as a ventilation channel for water vapour flowing outwardly from the frame to the cavity. In this way the steel frame is kept warm by heat flowing from the house interior but water vapour is allowed to flow outwardly from frame to cavity.
1. A wall for a metal-framed building in which a substantially water-vapour-impermeable insulation material is applied to the exterior of the metal frame and this material is separated by a cavity from an outer cladding wall, characterised in that the insulation material is provided with ventilation channels of controlled width which slope downwardly from the interior surface to the exterior surface of the insulation material.
2. A wall as claimed in claim 1 in which the ventilation channels run in substantially horizontal lines across the layer of insulation material.
3. A wall as claimed in claim 1 in which the width of the ventilation channels is between 1 and 5 millimetres.
4. A wall according to claims 1-3 in which the insulation material is in the form of slabs or batts of closed-cell plastics material and vertical joints between such slabs or batts are sealed.
5. A wall according to claims 1 to 3 in which the downward slope of the channels is at least 5" to the horizontal.
6. A wall according to claims 1 or 5 in which the downward slope is at least 10 to the horizontal.
7. A wall for a metal-framed building substantially as hereinbefore described, with reference to the accompanying drawing.
8. A method of building a wall for a metal-framed building substantially as hereinbefore described.
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (8)

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION Improvements in or relating to metalframed buildings This invention relates to metal-framed buildings and more especially to steel-framed domestic buildings. The problem of keeping structural steelframes warm and of avoiding condensation on such frames is set out in U.K. patent specification 2,11 9,828A published in November 1 983. This specification also offers one solution to these problems, using moisture-permeable external insulation. However where the external steel-frame insulation is in the form of batts or slabs of essentiaily moisture impermeable foamed plastics material e.g. faced closed-cell polyurethane foams, the solution proposed in the above specification is not applicable. We have now devised a solution to the problems referred to above for the case where the external insulation material is substantially impermeable to water vapour. This invention consists in a wall for a metalframed building in which substantially watervapour-impermeable insulation material is applied to the exterior of the metal frame and this material is separated by a cavity from an outer cladding wall, characterised in that the impermeable insulation material is provided with ventilation channels of controlled width, these channels sloping downwardly from the interior to the exterior surfaces of the insulation material. Preferably the ventilation channels run substantially horizontally across the layer of insulation material. Preferably the width of the channels is between 1 and 5mm. Preferably the external insulation material is in the form of slabs or batts of closed-cell foamed plastics material and the vertical joints between the slabs or batts are butted together and sealed. Preferably the downward slope of the channels from interior to exterior surfaces of the insulation is at an angle of at least 5" to the horizontal, more preferably at least 10 to the horizontal. The invention will be further described with reference to the accompanying single figure of diagrammatic drawing which represents a section through a wall according to the invention as cut by a vertical plane at right angles to the wall. As can be seen the steel frame 1 is sandwiched between an inner layer of plasterboard 2-2 and an outer layer of slab foamed insulation material 3, the latter being separated, by a cavity 4 from an outer cladding wall of brick or block material 5. According to the invention the insulating slab material is provided with ventilation channels 6 which run substantially horizontally along the slabs but are angled, in section, so that there is a downward slop from the inner to the outer surfaces of the slab. This angle is sufficient to prevent the flow of liquid moisture from the cavity to the steel frame but acts as a ventilation channel for water vapour flowing outwardly from the frame to the cavity. In this way the steel frame is kept warm by heat flowing from the house interior but water vapour is allowed to flow outwardly from frame to cavity. CLAIMS
1. A wall for a metal-framed building in which a substantially water-vapour-impermeable insulation material is applied to the exterior of the metal frame and this material is separated by a cavity from an outer cladding wall, characterised in that the insulation material is provided with ventilation channels of controlled width which slope downwardly from the interior surface to the exterior surface of the insulation material.
2. A wall as claimed in claim 1 in which the ventilation channels run in substantially horizontal lines across the layer of insulation material.
3. A wall as claimed in claim 1 in which the width of the ventilation channels is between 1 and 5 millimetres.
4. A wall according to claims 1-3 in which the insulation material is in the form of slabs or batts of closed-cell plastics material and vertical joints between such slabs or batts are sealed.
5. A wall according to claims 1 to 3 in which the downward slope of the channels is at least 5" to the horizontal.
6. A wall according to claims 1 or 5 in which the downward slope is at least 10 to the horizontal.
7. A wall for a metal-framed building substantially as hereinbefore described, with reference to the accompanying drawing.
8. A method of building a wall for a metal-framed building substantially as hereinbefore described.
GB08406853A 1984-03-16 1984-03-16 Condensation drainage Expired GB2155968B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB08406853A GB2155968B (en) 1984-03-16 1984-03-16 Condensation drainage

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB08406853A GB2155968B (en) 1984-03-16 1984-03-16 Condensation drainage

Publications (3)

Publication Number Publication Date
GB8406853D0 GB8406853D0 (en) 1984-04-18
GB2155968A true GB2155968A (en) 1985-10-02
GB2155968B GB2155968B (en) 1987-04-08

Family

ID=10558179

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08406853A Expired GB2155968B (en) 1984-03-16 1984-03-16 Condensation drainage

Country Status (1)

Country Link
GB (1) GB2155968B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19852106A1 (en) * 1998-11-12 2000-05-18 Hubert Fritz Wall especially for wooden building has drainage channel or channel system running down on inside of wall or inside wall itself
US10202774B2 (en) 2015-04-17 2019-02-12 B R Testing Limited Fitting external insulation systems to buildings

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1419570A (en) * 1972-03-02 1975-12-31 Hala A A Insulated and waterproof wall assembly and a method of fabricating such a wall assembly

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1419570A (en) * 1972-03-02 1975-12-31 Hala A A Insulated and waterproof wall assembly and a method of fabricating such a wall assembly

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19852106A1 (en) * 1998-11-12 2000-05-18 Hubert Fritz Wall especially for wooden building has drainage channel or channel system running down on inside of wall or inside wall itself
US10202774B2 (en) 2015-04-17 2019-02-12 B R Testing Limited Fitting external insulation systems to buildings

Also Published As

Publication number Publication date
GB8406853D0 (en) 1984-04-18
GB2155968B (en) 1987-04-08

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Legal Events

Date Code Title Description
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19990316