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    Rising Damp

    Rising damp

    Rising damp is a common issue in many older homes in Sydney, particularly in areas with high humidity and a history of poor construction practices. It occurs when groundwater or moisture from the ground is drawn upward through porous building materials like bricks and mortar.

    Rising damp: What you need to know

    Causes of rising damp

    Lack of damp-proof course (DPC)

    Many older homes in Sydney were constructed without an effective damp-proof course or with a deteriorated one. A DPC is a barrier typically made of materials like slate or plastic that prevents moisture from rising from the ground into the walls.

    Poor drainage

    Inadequate drainage around the foundation of a home can lead to an accumulation of water near the walls. This water can then be drawn upward by capillary action, causing rising damp.

    High groundwater levels

    Homes in low-lying areas or areas with high water tables are more susceptible to rising damp, as the groundwater is closer to the surface.

    Effects of rising damp

    Damage to building materials

    Over time, rising damp can cause damage to walls and building materials. It can lead to the deterioration of plaster, paint, and mortar, as well as the growth of mould and mildew.

    Health risks

    The presence of mould and damp conditions can contribute to poor indoor air quality and may exacerbate respiratory problems for residents. It can also attract dust mites, which are allergenic.

    Structural damage

    In severe cases, rising damp can lead to structural issues, including damage to timber structures. It can weaken the integrity of load-bearing walls and cause structural instability.

    Solutions for rising damp in Sydney homes

    Installation of a damp-proof course

    Retrofitting a damp-proof course is a common solution for rising damp. This involves injecting a damp-proofing material into the walls to create a barrier that prevents moisture from rising.

    Improved drainage

    Ensuring proper drainage around the foundation is essential. This may involve installing or repairing gutters, downspouts, and surface drainage systems to direct water away from the building.

    Vented cavity walls

    Some homes may benefit from retrofitting vented cavity walls, which allow for better air circulation and moisture control within the wall cavity.

    Exterior waterproofing

    Applying waterproof coatings or membranes to the exterior of the walls can prevent moisture from penetrating the building materials.

    Interior remediation

    If rising damp has caused damage to interior finishes like plaster and paint, these will need to be repaired or replaced. It's crucial to address any mould or mildew growth during this process.

    Dehumidifiers and ventilation

    Using dehumidifiers and improving ventilation within the home can help control indoor humidity levels and reduce the risk of rising damp.

    Professional assessment

    For rising damp situations

    It's advisable to have a professional building inspector or damp specialist assess the extent of the rising damp issue and recommend appropriate solutions tailored to your specific situation.

    Mirea Renovations understands rising damp in Sydney homes

    Addressing rising damp in Sydney homes typically involves a combination of solutions. The choice of remedy will depend on the severity of the issue and the specific circumstances of your property. Consulting with a qualified building professional or damp specialist is essential to determine the best approach to mitigate and prevent rising damp effectively.

    Get in touch with Mirea Renovations!

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    Rozelle, Balmain, Birchgrove, Lilyfield, Leichhardt, Marrickville, Dulwich Hill, Earlwood, Petersham, Stanmore Lewisham, Summer Hill, Canterbury, Hurlstone Park, Ashfield, Ashbury, Croydon, Croydon Park, Burwood, Burwood Heights, Haberfield, Strathfield, Strathfield South, Homebush, Paddington, Surry Hills, Pyrmont, Ultimo, Darlington, Chippendale, Glebe, Alexandria, St Peters, Tempe, Enmore, Newtown, Erskineville, Eveleigh, Redfern, Waterloo . . . And more!