Cavity Wall Ties

Intrusive cavity wall tie inspection surveys:

We carry out cavity wall tie inspection ‘s with the use of a video and camera boroscope which can be rotated, this is inserted into the cavity to clearly inspect the condition of cavity wall ties. The condition of cavity wall ties may cause concern if any movement is noted to the property ie stepped cracking to the external brick or stone, cracking to internal plaster finishes or expansion of render/coated finishes.

Movement to a property can be caused by a number of reasons including subsidence due to problems with the foundations which may be caused by poor fill, excessive moisture and drying or movement due to surrounding tree roots. Otherwise from corroded cavity ties or even natural settlement. Therefore cavity wall ties should be inspected to rule out or confirm this possible cause.

Where render or other coatings are present the walls must be drilled internally to prevent damage to the coating.

Please note: if the property is rubble filled or cavity wall filled it may not be possible to inspect the cavity wall ties without opening up the cavities which is more disruptive and subject to higher costs. However the boroscope can be used to confirm whether fill is present and the type.

These type of inspections have also been carried out to inspect timber framed buildings and to inspect for breaches in the cavity.