Roundtower Heritage Grout
Roundtower Heritage Grout is a dry, ready-mixed Natural Hydraulic Lime grout designed for pumping, pouring, or needle injection into voids within solid masonry structures. With its fine particle size and high-flow characteristics, it is specifically developed for consolidating stone and brick masonry, filling internal voids, cracks, and delaminated cores while maintaining the breathability of the wall structure.
Manufactured using 100% pure Natural Hydraulic Lime, graded powdered mineral fillers, and carefully selected conservation-grade additives, Heritage Grout is suitable for heritage repairs, structural consolidation, and masonry stabilisation where compatibility with traditional construction is essential.
Technical Data
| Property | Value |
|---|---|
| Product Type | Natural Hydraulic Lime Grout |
| Binder | Natural Hydraulic Lime |
| Application | Pumping, Pouring & Needle Injection |
| Yield | Approx. 14.5–16 Litres per 12.5kg Bag |
| Packaging | 12.5kg Bags |
| Vapour Behaviour | Breathable & Vapour Open |
| Strength Options | Ultra Low, Low, Medium & High Strength |
| Suitable Uses | Void Filling & Masonry Consolidation |
Key Benefits
Designed for Masonry Consolidation
The fine particle size and high-flow formulation allow the grout to penetrate deep into voids, cracks, and cavities within masonry structures.
Breathable & Compatible
Manufactured using Natural Hydraulic Lime, Heritage Grout remains vapour open and compatible with traditional solid-wall construction.
High Flow Characteristics
Suitable for:
- Gravity pouring
- Pump injection
- Needle injection
allowing effective filling of inaccessible voids within masonry.
Multiple Strength Options
Available in:
- Ultra Low Strength
- Low Strength
- Medium Strength
- High Strength
allowing the grout specification to be matched to the substrate and project requirements.
Suitable for Heritage Projects
Developed for conservation and restoration work where sympathetic repair and compatibility with historic fabric are essential.
Typical Applications
- Masonry consolidation
- Void filling
- Crack filling
- Stone wall stabilisation
- Brick masonry repairs
- Needle injection grouting
- Heritage restoration
- Conservation projects
- Solid wall construction
Why Use Heritage Grout?
Traditional masonry structures often contain hidden voids, delaminated cores, or areas of weakened masonry that require stabilisation without introducing rigid or impermeable materials.
Roundtower Heritage Grout provides a breathable lime-based solution that can be pumped or injected into these voids, helping consolidate the structure while maintaining compatibility with traditional masonry construction. The availability of multiple strength grades allows the grout to be matched to the existing substrate, reducing the risk of introducing unnecessarily strong repair materials.
Installation Overview
1. Investigation
Identify the location and extent of voids before specifying the appropriate grout strength.
2. Mixing
Add water in accordance with the project specification and mix thoroughly until a smooth, pumpable consistency is achieved.
3. Application
Suitable for:
- Pumping
- Gravity pouring
- Needle injection
depending on the nature of the void and access available.
4. Consolidation
Allow the grout to fully penetrate and consolidate the masonry before undertaking further repair works.
5. Storage
Store dry and protected from moisture prior to use.
Available Strength Grades
| Grade | Typical Use |
|---|---|
| Ultra Low Strength | Fragile historic masonry |
| Low Strength | Traditional stone and brickwork |
| Medium Strength | General consolidation works |
| High Strength | Structural masonry stabilisation |
The appropriate strength should always be selected based on the condition and strength of the existing masonry.
