Roundtower Tanking Render
Roundtower Tanking Render is a breathable lime-based tanking render designed to manage moisture in below-ground and moisture-exposed masonry. Formulated using Natural Hydraulic Lime and specialist waterproofing additives, it provides resistance to liquid water ingress while remaining significantly more vapour open than conventional cement tanking systems.
Suitable for basements, cellars, retaining walls, and damp masonry, the system helps control moisture penetration while allowing the wall structure to continue drying through vapour diffusion. This makes it particularly suitable for traditional solid-wall buildings where complete moisture entrapment is undesirable.
Technical Data
| Property | Value |
|---|---|
| Product Type | Lime-Based Tanking Render |
| Binder | Prompt Natural Cement |
| Application | Internal & External |
| Vapour Behaviour | Breathable & Vapour Open |
| Water Resistance | Resistant to Liquid Water Ingress |
| Suitable Substrates | Stone, Brick, Blockwork |
| Packaging | 25kg Bags |
Key Benefits
Controls Moisture Ingress
Designed to resist the passage of liquid water through masonry while maintaining the drying potential of the wall structure.
Breathable Construction
Unlike dense cement tanking systems, the render remains vapour open, helping moisture vapour escape safely through the building fabric.
Suitable for Traditional Buildings
Compatible with:
- Stone masonry
- Brick masonry
- Lime-built structures
- Solid wall construction
Durable & Flexible
The lime-based formulation provides improved compatibility with traditional masonry compared to rigid cement-based alternatives.
Internal & External Use
Suitable for:
- Basements
- Cellars
- Retaining walls
- Damp-prone masonry
- Below-ground applications
Typical Applications
- Basement waterproofing
- Cellar renovations
- Retaining walls
- Damp stone walls
- Moisture-prone masonry
- Heritage buildings
- Solid wall construction
- Breathable renovation projects
Why Use Roundtower Tanking Render?
Traditional masonry walls often need to manage both moisture ingress and moisture evaporation. Dense cement tanking systems can restrict drying and may increase moisture accumulation elsewhere within the structure.
Roundtower Tanking Render is designed to provide resistance to liquid water while maintaining vapour permeability, helping create a more balanced moisture management strategy within traditional masonry buildings.
It is particularly useful where:
- ground-retained walls are present,
- moisture penetration is occurring,
- or breathable construction principles must be maintained.
Installation Overview
1. Surface Preparation
Substrates should be:
- clean,
- stable,
- free from dust,
- paint,
- and loose material.
2. Application
Apply directly to suitably prepared masonry in accordance with the project specification.
3. Finishing
Can be finished with compatible breathable lime plasters and mineral finishes where required.
4. Protection & Curing
Protect fresh work from:
- frost,
- rapid drying,
- heavy rain,
- and direct sunlight.
5. Storage
Store dry and protected from moisture prior to use.
Typical System Uses
| Application | Recommended Use |
|---|---|
| Basements | Moisture control below ground level |
| Retaining Walls | Ground-retained masonry |
| Damp Stone Walls | Breathable tanking solution |
| Heritage Buildings | Moisture management in traditional construction |
| Cellar Conversions | Vapour-open waterproofing system |
For projects involving significant ground moisture or hydrostatic pressure, the surrounding ground conditions, drainage strategy, and overall wall build-up should always be considered as part of the design.
