Cavity Wall Insulation

The survey process

It is essential that an experienced surveyor assesses the suitability of the property for cavity wall insulation. Not all houses are suitable for insulation (because of age, existence of structural defects, or exposure to prevailing weather).

Failure to provide adequate ventilation in your loft can cause condensation and excessive dampness ultimately leading to problems such as wet or dry rot and infestation of wood boring insects. Our surveyors are trained and qualified to assess the suitability of a property for installing additional home insulation.

It is extremely unlikely that problems with cavity wall insulation will occur when your house has been surveyed correctly and insulation installed by a reputable contractor. We do not offer any cavity wall insulation system that is not backed by a 25 year warranty.

random stone walls
random stone walls require a more detailed inspection A heat recovery ventilation unit to combat damp walls and mould
Tanks in the loft should
always have a cover

The following points will be checked during our survey:

  • The type of wall construction and the width of the cavity.
  • The total wall area.
  • Type of structure, e.g. brick and breeze / concrete block, or stone outer wall.
  • Services through the cavity, for example gas flues or cables.
  • The cavity is free of debris.
  • The damp course is not defective.
  • The cavity tops are sealed.
  • Condition of the wall structure to identify potential defects.
  • That ventilation is adequate underneath ground floor timbers.
  • That ventilation is adequate for gas appliances (that meet certain criteria).
  • That no damp is present; we test all properties as a matter of course.
  • Stone built houses require very careful examination.

Loft Insulation Survey

The following points are checked during a survey for loft insulation:

  • The existing depth of any current insulation and the extra thickness required.
  • The area of insulation required, and any boarded areas.
  • The length of live pipe work to be insulated.
  • The number of cold water tanks to be insulated.
  • The position of the hatch relative to tanks and pipes.
  • If the loft has adequate ventilation.
  • No roof leaks or damp is present.
  • The existing electrical wiring and spotlights in bathrooms need to be assessed.
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Keeping Yorkshire warmer
cold walls, no ventilation cause damp, condensation and mould