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BasementWaterproofing

A wet basement is a serious problem. Get expert help before it gets worse.

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Why Basement Waterproofing is So Important

  • Basements are underground - water in the soil pushes in from all sides.
  • Even tiny cracks let in water over time.
  • A wet basement causes mould, rot, and structural damage.
  • It ruins stored items and makes the space unusable.
  • Water weakens the foundations of your whole building.
  • Fixing basement water problems early saves tens of thousands of rands.
  • A dry basement adds usable space and value to your property.

Types of Basement Waterproofing

Rising Damp Solutions

  • •Rising damp is when water from the ground soaks up into your walls - like a sponge.
  • •You can see it as a tide mark or damp patch on the lower part of your walls.
  • •Salt crystals and flaking paint are common signs.
  • •A damp-proof course (DPC) injection is often used to stop it.
  • •A waterproof render (coating) is then applied to the walls.
  • •Must be done by a professional - DIY products rarely work.

Negative Side Waterproofing

  • •This means applying waterproofing on the INSIDE of the basement wall.
  • •Used when you cannot access the outside of the wall.
  • •Special products bond to the wall and block water from coming through.
  • •It is not the first choice - but very effective when the outside is not accessible.
  • •The wall must be cleaned and cracks repaired first.
  • •Often used in older buildings where excavation is not possible.

Structural Sealing

  • •This fixes cracks and gaps in the basement walls and floor.
  • •Expanding sealants are injected into cracks - they grow to fill the gap completely.
  • •Larger cracks are cut out, cleaned, and filled with specialist waterproof materials.
  • •Joints between walls and floors get extra sealing - this is a common leak spot.
  • •After structural sealing, a waterproof coating is usually applied over the top.
  • •Keeps the structure strong and watertight for many years.

Signs Your Basement Has Water Problems

  • You can see or smell damp in the basement.
  • There are white powdery stains on the walls (called efflorescence).
  • Paint is bubbling or peeling off the walls.
  • The floor feels damp or there are puddles after rain.
  • Mould or mildew is growing on the walls, floor, or stored items.
  • Cracks are appearing in the walls or floor.
  • A musty smell that gets worse in winter or after rain.

How Much Does It Cost?

  • Basic crack repairs: R2,000 – R8,000.
  • Negative side waterproofing: R5,000 – R20,000.
  • Full basement waterproofing: R15,000 – R60,000+.
  • Price depends on basement size, severity of the problem, and access.
  • Rising damp treatment: R3,000 – R15,000 depending on wall length.
  • Always get at least 3 quotes - this is a big job and prices vary widely.

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