Bulging Walls and Bowing Walls

Bulging walls in period properties are a common defect that are often seen along the gable and flank elevations of a property. This defect is especially common in Edwardian and Victorian properties but is also evident in properties of all ages.

Bowing Wall
Bowing Wall

Bowing walls should not be regarded as ‘just the way it was built’ this is a serious structural defect that will require a structural repair solution in order to prevent further movement or complete failure.

If the bowing in the wall is only at the levels where the floor joists run either into or alongside then this is more than likely to indicate that lateral movement also known as outward movement has occurred.

Lateral Restraint Tie
Lateral Restraint Tie

Lateral movement occurs when there is no connection between the masonry and the floor joists or stair case allowing the masonry to move independently. In order to prevent further outward movement you must provide a connection between the two.

Newman’s utilise Twistfix lateral restraint ties which are an 8mm stainless steel tie which are installed externally through a 12mm hole in the masonry into the floor joist. With a concealed resin fix to the masonry we are able to tie the masonry to the floor joist which restrains any further movement.

Wall Tie Failure Caused Bowing Walls

In modern properties or buildings constructed with a cavity wall then the bowing if not confined to the floor joist levels only could indicate that there are other structural defects such as wall tie failure which will need to be assessed.

Out lateral restraint schemes for bowing walls can be guaranteed for ten years covered by an IGL insurance backed guarantee. Contact us today if your property is showing signs of outward movement.

 

 

 

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Cracks Above Window and Door Openings

Diagonal cracks above window openings and door openings are common structural defects that show signs of movement which will need to be rectified.

Diagonal Cracking Above Opening
Diagonal Cracking Above Opening

Diagonal stepped cracking often indicates that the lintel that supports the masonry above the opening has failed. There are many types of lintels available and in use such as brick arch and soldier course lintels commonly found in period properties. Newer lintels are normally steel Catnic type lintels which can also fail showing signs of diagonal cracking above the opening.

Diagonal Cracking Above Opening
Diagonal Cracking Above Opening

In many instances the threat of collapse is over looked and simply ignored, in some cases cracks are raked out and repointed but if further movement was to occur the already compromised lintel could in theory collapse bringing the masonry above it crashing down as well.

Diagonal Cracking Above Opening
Diagonal Cracking Above Opening

Lintel Failure often occurs upon the removal of hardwood windows that were originally designed to bear a substantial load without distorting and are replaced with standard uPVC windows which are non-load bearing allowing the lintel to drop or bow causing sagging of the lintel which is shown by the diagonal stepped cracking.

Traditional methods are to remove the lintel and rebuild it, this is an intrusive method of repair and a slow process typically taking around a day to properly remove and replace a lintel.

Lintels can now be repaired using the Twistfix Helical System by using their Bed Joint Reinforcement which effectively creates a new lintel within the existing masonry by remove the mortar within two bed joints above the lintel and inserting helical rods encompassed in grout to create a load bearing lintel which spreads the structural loads across the length of the bars preventing further sagging of the lintel.

Bed Joint Reinforcement Repairing Lintels
Bed Joint Reinforcement Repairing Lintels

With the patented Twistfix 9mm CD helical tie we are able to install 450mm long ties vertically through the masonry in the lintel and pin it into the masonry above. This method is a vast improvement on previous pinning methods which often required 16mm holes drilled through the lintel. We can now install these ties through just 6 or 7mm pilot holes.

This type of repair is a fast and effective method of repair which has been tried and tested with BRE approval. Newman’s can guarantee this type of repair for ten years as we are a member of IGL insurance which covers the consumer in the event that we cease trading.

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Wall Tie Installation

Newman’s have completed a wall tie replacement repair to a property purchased by a private home owner. The home owner became concerned after the purchase as short horizontal cracks were appearing in the outer leaf of the brickwork as well as some of the bricks lifting and rotating.

Wall Tie Installation

Newman’s carried out a wall tie survey using a visual survey and an endoscope survey to determine the condition of the existing wall ties. The wall ties were found to be in a poor state with high levels of corrosion and inadequately spaced.

Current Wall Ties Corroded and Wrongly Spaced

Our specification included the installation of Twistfix’s patented CD 9mm stainless steel Remedial Wall Tie. Installation is a simple process with the helical tie being installed through a 6mm pilot hole.

 

Isolation of the tie is carried out by locating the existing wall tie and encompassing it with a clan sleeve also supplied by Twistifx. With sleeves in place and the ties isolated re-pointing of the cracked masonry can be carried out and tie holes filled with a mortar to match the existing bricks.

Replacing Current Wall Ties

All of our repair schemes are covered by our own guarantee and for consumer protection we are also members of Insured Guarantees Limited enabling us to provide you with an insurance backed guarantee, which for this particular project guarantees the installation for 20 years even if Newman’s are no longer operating.

 

 

 

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