Category Archives: Listed Buildings

Crack Stitching with HeliBond. Why is it important?

HeliBond is an injectable, non-shrink, thixotropic, cementitious grout that rapidly develops high compressive bond strength. It has been specifically formulated by Helifix to achieve the highest standards required that are necessary to ensure effectiveness and structural safety of the repair undertaken using Helifix product. 

Key characteristics

  • Non-shrink grout  which exhibits excellent thixotropic properties
  • Flows easily under pressure to fill voids
  • Rapidly develops compressive strength
  • Cures to 45N/mm²
  • Ready-to-mix components supplied in two-pack sets to reduce waste

HeliBond is suitable for bonding HeliBars into most common masonry-type substrates, including brick, stone, pre-cast concrete and Aircrete blocks.

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What causes walls to bow or bulge?

Bowing, leaning or bulging in external walls are a result of decreasing wall stability, these defects are often a symptom of:

Prolonged vibrations from heavy traffic or plant machinery

  • An increase in the floor loads (for example where additional floors have been added to an existing building)
  • The original walls being insufficiently thick in comparison to the building height
  • A lack of restraint between the external walls and the floor joists, beams and partitions Continue reading »