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Waterproofing without excavation
Waterproofing from inside, usually without excavation. Your specialist partner examines the masonry and recommends the appropriate method.
AI-generated visualisationDry walls with wetBLOC.
Stop rising damp and lateral moisture ingress. Waterproofing from inside – usually without excavation. Personal advice from your regional specialist partner. Preserve the building fabric. Use your rooms again.
Start the damage assessment nowWaterproofing from inside
Trained specialist contractors
15-year system warranty
How the waterproofing technology works
The swellable wetBLOC polymer gel waterproofs masonry from within against rising damp and lateral moisture ingress. It works horizontally and vertically while maintaining vapour permeability.
- Effective horizontally and vertically within masonry
- Stops capillary water transport and remains vapour-permeable
- Suitable for existing, older and heritage-listed buildings
Tested quality
Researched with Fraunhofer UMSICHT. Independent institutes tested moisture behaviour, compatibility and classification under chemicals legislation.
WTA & EPASIT
Masonry waterproofing guided by WTA principles, combined with certified EPASIT products for long-term moisture protection.
Quality assured
Trained specialists, clear application guidelines and documented procedures ensure consistently high workmanship.
15-year system warranty
wetBLOC and EPASIT provide a 15-year voluntary system warranty on the agreed waterproofing measure.
How wetBLOC supports you
Know the costs in advance
After the investigation, you receive a recommendation and a quotation. You clarify the work, costs and dates with your specialist partner before work begins.
Use your basement again
After waterproofing, drying and repairs, you can use your rooms appropriately again – for example as storage, a workshop or a hobby room.
AI-generated example images.
Your path to a dry basement
in 4 weeks
From initial enquiry to waterproofing — individually planned. Subsequent drying depends on your masonry.
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Today
Describe the damp damage
Select your damage condition and region. Briefly describe what you have noticed in the basement.
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Shortly afterwards
Appointment with your specialist partner
Your regional contact clarifies initial questions with you and arranges an inspection.
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Week 1
Inspect the basement on site
The specialist partner examines the cause of damp, the wall construction and the condition of the masonry to determine the appropriate waterproofing.
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Week 2–3
Quotation and remediation plan
You discuss the recommended work, costs and execution date. Remediation is only scheduled once you have commissioned it.
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Week 4
Waterproof and support the drying process
The specialist contractor develops a remediation plan tailored to your building. This includes masonry waterproofing with wetBLOC, suitable renovation plaster work, professional support during subsequent drying and any necessary follow-up inspections.
Open to read
What was
investigated for wetBLOC?Research & laboratory tests
Scientifically researched, investigated in the laboratory and assessed for health effects.
wetBLOC technology has been scientifically researched and further developed. Independent institutes examined key material properties, its behaviour in masonry and health-related aspects.
Find out more about the four quality areas:
- Research and further development
- Health assessment
- Water absorption and material structure
- Classification under chemicals legislation
Moisture protection for floor and masonry
During the full renovation, the floor slabs and floor moisture protection were renewed. The horizontal wetBLOC treatment complemented the concept within the existing masonry.
- Property
- Existing building
- Scope
- 89.45 m² floor area
- Project duration
- 1 week
Horizontal and vertical waterproofing in hollow block masonry
Following persistent damp and salt damage, the basement received targeted remedial treatment: horizontal and vertical wetBLOC treatment, hollow-chamber filling and a new cove fillet.
- Property
- Detached house / basement
- Scope
- Approx. 12 linear m · approx. 18 m²
- Project duration
- 3 days
Targeted test remediation in historic masonry
After two insufficiently successful PU resin injections, a limited test area was treated with wetBLOC. Those involved in the project assessed the follow-up observations for this wall area positively.
- Property
- House with historic masonry
- Scope
- Approx. 2.4 m² test area
- Project type
- Test remediation
Horizontal barrier zone and vertical cavity filling
The remediation combines horizontal masonry injection over approximately 78 linear metres with vertical hollow-chamber filling over approximately 32 m². A cove fillet and mineral renovation plaster complete the plan.
- Property
- Detached house / basement
- Scope
- approx. 78 linear m · approx. 32 m²
- Project type
- Basement remediation
Moisture protection for historic masonry
In 2018, the historic church building was treated with a horizontal wetBLOC barrier zone, followed by plaster renovation. Preserving the building fabric and church fittings was the priority.
- Property
- Historic church building
- Scope
- 89 linear metres
- Project type
- Church restoration
wetBLOC horizontal damp-proof course in a brick building
Rising damp in the hallway of a brick building from 1975 was treated with a horizontal wetBLOC barrier zone extending approximately 18 linear metres.
- Property
- Brick building, built in 1975
- Scope
- approx. 18 linear metres
- Project type
- Masonry waterproofing
Horizontal and vertical remediation while preserving exposed brick masonry
In the basement of a primary school, approximately 70 m² of wall area and approximately 35 linear metres of horizontal barrier were treated with wetBLOC. The original brick surfaces were preserved without a final renovation plaster layer.
- Property
- Community primary school, built around 1950
- Scope
- approx. 70 m² · approx. 35 linear metres
- Project type
- Masonry waterproofing
Moisture protection for a 15th-century castle basement
Approximately 80 m² of wall surface in mixed masonry up to 1.80 m thick below moat level were treated. After around six months of drying, renovation plaster was applied to some areas; historic stone surfaces remained exposed.
- Property
- Historic castle cellar
- Scope
- Approx. 80 m² · approx. 40 linear m
- Project type
- Historic cellar remediation
Active regionsExpansion areas
wetBLOC in your region.
Our regional specialist partners are personally available on site for consultation, condition surveys and renovation.
Enquire about a project in your regionResearch and laboratory tests.
From research to analysis of material behaviour in masonry: find an overview of the research, investigations and material assessments here.
View research report
Fraunhofer UMSICHT
Hygiene-Institutof the Ruhr region
Hygiene-Institut des Ruhrgebiets
Institute for Analytics
Classification under chemicals legislation
EU REACH Regulation
Have questions?
We have solutions.
Is wetBLOC suitable for my masonry?
wetBLOC is suitable for almost all capillary-porous masonry types, including brick, sand-lime brick, natural stone and hollow blocks. A specialist partner assesses suitability based on the wall construction, masonry condition and existing moisture exposure.
Does my garden need to be dug up?
No, usually not. wetBLOC is injected into the masonry from inside, so extensive earthworks can be avoided. In over 3,500 projects so far, we have been able to avoid exposing the exterior walls.
Who carries out the work?
Remediation is carried out by specially trained wetBLOC specialists. Your regional contact supports you from personal consultation and planning through to professional execution and aftercare.
How much does remediation cost?
Costs depend on the size of the wall areas to be treated, masonry condition, moisture exposure and scope of renovation required. After the on-site examination, you will receive a quotation tailored to your building.
How does the warranty work?
wetBLOC and EPASIT provide a voluntary 15-year system warranty on the agreed waterproofing measure. This requires approved EPASIT products, professional application in accordance with technical guidelines and complete documentation. The warranty covers functionality against the moisture exposure defined in the remediation plan. If a functional defect covered by the warranty is demonstrated, remedial work is carried out free of charge in accordance with the warranty conditions. Statutory rights in respect of defects remain unaffected. Your executing specialist partner will provide the specific warranty conditions.
Discuss your renovation project with wetBLOC
Your regional wetBLOC specialist partner assesses the building conditions and works with you to develop a remediation plan tailored to your building.
Request a consultation