FAQs Archive - Page 2 of 29 - Northwest Wall Ties

Q: Can crack stitching be used on external walls?

Yes, crack stitching is commonly used to reinforce suitable cracked external masonry. The repair method and materials should be appropriate for the type of wall, existing masonry and location of the crack.

Q: Can crack stitching repair cracks around windows and doors?

Potentially, yes. Cracking around window and door openings can occur because these areas experience changes in load distribution and movement. The cause and condition of the surrounding masonry should be assessed to determine whether crack stitching is appropriate.

Q: Can crack stitching be used on old brickwork?

Crack stitching can be suitable for many types of existing masonry, including older brickwork, provided the surrounding masonry is suitable for the repair. The condition of the bricks, mortar and affected area should be assessed before work begins.

Q: Will you need to remove the bricks?

In many suitable crack stitching repairs, the existing bricks can remain in place. The stitching bars are installed into the mortar joints rather than requiring the wall to be dismantled. However, the appropriate repair depends on the condition and extent of the damage.

Q: Are crack stitching bars visible after the repair?

No. The bars are installed into the mortar joints and are covered during the repair process. Once completed and the mortar is finished, the repair is designed to blend into the existing brickwork .

Q: How does crack stitching work?

Stainless steel helical bars are installed horizontally into the mortar joints, extending across the crack and into sound masonry on either side. The bars are securely bonded into place, helping tie the masonry together and distribute stresses across the affected area .

Q: Does crack stitching fix the cause of the crack?

Crack stitching primarily reinforces and stabilises the masonry . It does not automatically resolve every underlying cause of movement. Where cracking is associated with issues such as settlement, wall ties or lack of restraint, the underlying problem may also require attention.

Q: Can crack stitching stop a crack from coming back?

Crack stitching can help stabilise and reinforce suitable cracked masonry, but it is important to understand why the cracking occurred in the first place . If ongoing movement or another underlying issue is present, this may need to be addressed as part of the repair.

Q: Are stepped cracks in brickwork serious?

Not necessarily. Some cracks may be relatively minor, while others can indicate ongoing movement or a problem requiring further investigation. The width, direction, location and progression of the crack should all be considered when assessing the cause.

Q: What causes stepped cracking in brickwork?

Stepped cracking can have a number of causes, including movement and settlement, ground movement, thermal or moisture movement, inadequate restraint and wall tie problems . Previous unsuccessful repairs can also result in cracks reappearing.