Damp-Proofing Specialists
Before damp-proofing work on a building can begin, damp surveys have to be undertaken in order to find the correct source of dampness. Without a proper damp survey the source of dampness might be assumed, but there is no guaranteed proof. It is important to know the exact source of dampness, as treating the wrong damp problem can result in more harm than good.
We always advise that a damp expert from a respectable damp-proofing company undertakes a full damp survey to establish the correct source of dampness. Call us on 01403 210204 or submit an enquiry for information on damp-proofing companies in your area. Find a local TrustMark approved contractor. The costs of damp-proofing surveys may vary. Some damp-proofing companies offer free damp surveys.
When consulting a damp surveyor, you should make sure that they have the correct qualifications to carry out damp surveys: Certificated Remedial Damp-proofing Surveyor (CRDS) or Certified Surveyor in Remedial Treatment (CSRT).
The first step of surveying a building is an external examination. A surveyor will check for signs of water ingress from the outside, such as cracks in masonry, leaking pipes or broken flashings and tiles. The surveyor will examine the condition of brickwork, stone and mortar, chimneys, flashings, rainwater goods and valleys, as well as external timbers and the condition and fitting of windows, doors and air vents. Additionally, the position of existing remedial DPCs, and the ground levels will be examined.
After the external examination, the inside of the building will be inspected for visible signs of dampness. Fungal decay in timbers, such as skirtings; the peeling or blistering of wallpaper and paintwork; efflorescence; mould growth and staining on walls; as well as damp patches, water droplets and water running down walls are all signs of dampness.
Once the initial internal examination has been completed a more in depth look at the type of dampness will be taken. A correctly calibrated and fully functional electrical moisture meter should be at hand for this damp examination. The damp surveyor will use the moisture meter to inspect the moisture content of timber skirting and observe the distribution of moisture meter readings horizontally and vertically on the surface of the walls. Additionally, the surveyor should assess the condition of floor / wall junctions and the edge of the damp-proof membrane, as well as the perimeter and centre of solid and timber suspended floors. Whilst examining the floor it is advised to lift the floor boards and thoroughly inspect the timbers and subsite. The suitability of the subfloor ventilation should also be checked.
If remedial DPCs have previously been installed from the inside, their position and hole depth should be examined. When checking the condition of the walls, any use of polystyrene sheets or foil backing should be taken note of and, if present, the appearance of efflorescence beneath wallpaper finishes. If new plasterwork has recently been carried out, its condition, height and type should also be noted, as well as internal plumbing defects, water on cold pipes, etc.
A good damp surveyor will also investigate the history and use of the property, as the inhabitant’s lifestyle can affect the condition of the building.
Once the damp surveyor has carried out a thorough examination of the property, the symptoms can be analysed and a solution for the problems can be discussed.
Need expert advice and help to complete damp-proofing works? Call us on 01403 210204 or submit an enquiry for information on damp-proofing companies and contractors able to do all damp-proofing works for you.
Want to learn more about correctly damp-proofing buildings? See our range of training courses designed to teach damp-proofing contractors the right way to deal with damp correctly.
CPD Webinar Curriculum
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