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Foundation and retaining wall waterproofing

Waterproofing

Foundation and retaining wall waterproofing

Continuous “tanked” membrane waterproofing and XPS protection for raft foundations and retaining walls in new buildings.

Book a surveyCalculate quantities

When do you need it?

  • Before the foundation concrete of a new building is poured
  • Living space, parking or storage is planned in the basement
  • The soil report shows groundwater or seepage
  • The perimeter of an existing building can be excavated

Layer build-up

Foundation and retaining wall waterproofing
  1. 4Drainage and backfillDrain pipe and filter material
  2. 3Protection screed / XPSProtection during rebar fixing and backfillView product →
  3. 2Bitumen membrane (2 layers)Tanked from below the raft up the wallsView product →
  4. 1Blinding concreteClean, flat base
Layers are listed bottom-up; details are finalised per project after survey.

Process

Step by step

  1. 01Survey and measurement

    Our technical team measures moisture on site, inspects existing layers and details, takes dimensions and photos.

  2. 02System selection and quote

    Based on the survey we prepare a written quote with the system and layer-by-layer materials and labour.

  3. 03Below-raft layer

    Two membrane layers go on the blinding with at least 50 cm laps left for the wall junction.

  4. 04Protection

    A protection screed is poured so rebar work does not damage the membrane.

  5. 05Wall waterproofing

    After stripping formwork, walls are primed and two membrane layers are joined to the waiting laps; XPS boards are then bonded.

  6. 06Inspection and handover

    At completion we carry out a water test or visual inspection and hand over a photo report and written warranty certificate.

Products in this system

MB-BT-P4

Bitüra P4 Polyester Membrane

Waterproofing · Bitumen membrane

Coverage
1,12 m²/m² (bindirme dahil, her kat için)
Pack
10 m² roll (1 × 10 m)

FAQ

Is crystalline-admixture concrete enough?

Admixtures improve concrete watertightness but cold joints, tie holes and penetrations still need detailing. With groundwater, combine with a membrane.

Can an existing building’s foundation be waterproofed?

From outside if the perimeter can be dug; otherwise a crystalline system is applied from inside.

Why is drainage important?

Drainage prevents hydrostatic pressure building up behind walls, relieving and extending the life of the waterproofing.

Projects

Recent jobs

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