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Movement Control
Movement Control MOVEMENT CONTROL
All brickwork is subject to movement mainly as a result of temperature and atmospheric changes. The following basic recommendations will help accommodate expansion and contraction.
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a. Where design considerations preclude discrete panels, incorporate movement control joints to form the brickwork into panels in which the length is not greater than Movement Jointtwice the height. As a general rule vertical movement joints to accommodate horizontal Panel Length movement should be provided at typically Fig 1 | Unreinforced Panels 6m intervals as per PD 6697:2010 and hEN 1996:2006. Our technical Sales Department will be pleased to offer advice. b. Generally do not exceed designation III Movement Joint mortar If special constructions require stronger mortar, reduce the distance between Fig 1 | Unreinforced Panelsmovement control joints. Lime Sand Mortar will help repair small incidence of movement by "self healing". The use of Lime Sand Mortar gives a stronger bond than can be obtained with air entrained mortars of a similar compressive strength. This better bond is likely to result in greater resistance to rain penetration and improved flexural strength. c. Provide movement control joints where adjoining areas of structure will operate differently i.e. changes in thickness and height of wall.
Movement JointMovement Joint Panel LengthPanel Length
Fig 1 | Unreinforced PanelsFig 1 | Unreinforced Panels
Bed-joint Reinforcement Panel Length Movement Joint 0.6m (min)
Fig 3 | Typical locations for movement joints. Fig 2 | Bed-joint reinforcement above and below wall opening as an alternative to movement joints each side of the opening.
Bed-joint Reinforcement Movement Joint
Bed-joint Reinforcement 0.6m (min)
Movement Joint 0.6m (min) 0.45m (min)0.45m (min)
0.6m (min)0.6m (min)
Fig 3 | Typical locations for movement joints.
Bed-joint Reinforcement 0.45m (min)
0.6m (min) 0.6m (min)
Fig 1 | Unreinforced Panels
Movement Joint
Panel Length Panel Length
Fig 2 | Bed-joint reinforcement above and below wall opening as an alternative to movement joints each side of the opening. Panel Length
Panel Length
Movement Joint
Fig 1 | Unreinforced Panels
Fig 3 | Typical locations for movement joints.
Movement Joint Panel Length Panel Length
0.6m (min)
Bed-joint Reinforcement 0.6m (min) 0.45m (min) Movement Joint Panel Length Fig 4a | Build the brickwork with a straight open joint. Plug the centre of the joint with expanded polystyrene or Flexible Filler Flexible Sealant Panel Length similar material. Point with a flexible sealing compound. Alternatively a preformed jointing material can be used.
Panel Length 0.45m (min) Fig 1 | Unreinforced Panels
0.6m (min) 0.6m (min)
Bed-joint Reinforcement Fig 2 | Bed-joint reinforcement above and below wall opening as an alternative to movement joints each side of the opening. Movement Joint
Fig 2 | Bed-joint reinforcement above and below wall opening as an alternative to movement joints each side of the opening.
0.45m (min) 0.6m (min) 0.6m (min) Panel Length
Panel Length
Panel Length
Fig 3b | At change of wall thickness. Fig 3b | At change of wall thickness.
Panel Length
Fig 2 | Bed-joint reinforcement above and below wall opening as an alternative to movement joints each side of the opening. Fig 3 | Typical locations for movement joints.
Fig 2 | Bed-joint reinforcement above and below wall opening as an alternative to movement joints each side of the opening. Movement Joint
Fig 3a | At change of wall height.
Fig 3 | Typical locations for movement joints.
Fig 3b | At change of wall thickness. AG.UK.COM
Movement Joint Flexible FillerFig 3d | At abutment of wall and column.
Movement Joint Flexible Sealant
Fig 4a | Build the brickwork with a Fig 3a | At change of wall height. straight open joint. Plug the centre of the joint with expanded polystyrene or similar material. Point with a flexible sealing compound. Alternatively a preformed jointing material can Movement Joint be used.
Fig 3a | At change of wall height. Fig 3d | At abutment of wall and column. Flexible Filler Flexible Sealant
Fig 4a | Build the brickwork with a straight open joint. Plug the centre of the joint with expanded polystyrene or similar material. Point with a flexible sealing compound. Alternatively a Fig 3c | At chases and recesses for pipes, conduits, etc.Fig 3c | At chases and recesses for pipes, conduits, etc. preformed jointing material can be used. Flexible Filler Flexible Sealant
Fig 4a | Build the brickwork with a straight open joint. Plug the centre of the joint with expanded polystyrene or similar material. Point with a flexible sealing compound. Alternatively a preformed jointing material can be used.
Fig 4b | Recommended straight elevational treatment of movement joints. Panel Length
Panel LengthPanel Length
Fig 2 | Bed-joint reinforcement above and below wall opening as an alternative to movement joints each side of the opening. Fig 2 | Bed-joint reinforcement above and below wall opening as an alternative to movement joints each side of the opening.
Fig 3 | Typical locations for movement joints.
Fig 3 | Typical locations for movement joints. Fig 3 | Typical locations for movement joints.
Fig 3b | At change of wall thickness.
Movement JointMovement Joint
Fig 3a | At change of wall height.Fig 3a | At change of wall height. Movement Joint
Flexible FillerFig 3b | At change of wall thickness.Flexible Filler Fig 3a | At change of wall height. Flexible SealantFlexible Sealant
Fig 4a | Build the brickwork with a straight open joint. Plug the centre of the joint with expanded polystyrene or similar material. Point with a flexible sealing compound. Alternatively a preformed jointing material can be used. Fig 3b | At change of wall thickness. Fig 4a | Build the brickwork with a straight open joint. Plug the centre of the joint with expanded polystyrene or similar material. Point with a flexible sealing compound. Alternatively a preformed jointing material can be used.
Fig 3d | At abutment of wall and column.
Fig 3c | At chases and recesses for pipes, conduits, etc.
Fig 3c | At chases and recesses for pipes, conduits, etc.
Fig 3d | At abutment of wall and column. Fig 3d | At abutment of wall and column.Fig 3c | At chases and recesses for pipes, conduits, etc. Fig 3e | At expansion joints in concrete foundations, floors and roofs.
Fig 3e | At expansion joints in concrete foundations, floors and roofs. Fig 3e | At expansion joints in concrete foundations, floors and roofs. Fig 4b | Recommended straight elevational treatment of movement joints. Fig 4b | Recommended straight elevational treatment of movement joints.
AG Fine Cast Brick should be used from at least three bales to ensure a blend throughout the wall and eliminate unsightly banding.
All Fine Cast Brick products have a smooth arris which is laid to the building line and a hand made arris which is placed in the mortar bed. This however is not critical but does improve the aesthetic quality of the overall project.
a. Do not lay bricks when temperature is at or below 3°C, or when freezing may occur before the mortar has hardened. Consideration should be given to air and wind temperature.
b. When building brick in dry / warm conditions the workability of the mortar should be increased rather than wetting the actual brick. In damp weather conditions, a drier mortar consistency should be used to help increase suction on the brick.
Ensure that bed joints and perpendicular joints are fully filled to help prevent rain penetration.
c. Cavities and wall ties must be clean and free from mortar and debris. The wall-ties should be laid falling towards the outer leaf – never falling towards the inner leaf. The drip of the wall-tie (drip down) must be positioned centrally in the cavity. See diagram on right.
d. Partial cavity fill under the provisions of the building regulations a 50mm clear cavity must be maintained. Where partial or full cavity insulation is proposed always follow the manufacturers recommendations. Fill cavities below ground level with concrete to 150mm minimum and preferably 225mm below the ground level d.p.c. in the outer leaf. This is to stabilise the two leaves and to prevent the bottom of the wall filling with water.
e. Failure to lap d.p.c. reduces its efficiency. Recommended minimum lap in d.p.c. 150mm.
f. Clear weep holes should be provided wherever there is extensive bridging of the cavity. g. Propping and strutting of newly erected work, particularly gable ends, may be necessary during high winds. Scaffolding boards should be turned back to avoid unsightly splashing of the facing work.
Finished areas of wall should be covered as the work proceeds to avoid splashing and staining from other works.
h. Pre-formed cavity trays with stop ends are recommended. Trays without stop ends allow water-throw and subsequent staining of the brick work.
i. Sills and copings should project and provide a suitable drip. Failure to do so throws water onto the face causing staining and / or lime bloom.
j. Newly built brick work should be cleaned down and protected at the end of the working day from rain and frost.
