BorderLime

BorderLime is an offline construction calculator and masonry estimation toolkit.
This professional utility application provides field mix calculations, masonry quantity estimators, and site safety audits.

Developed with the practical craftsmanship principles of Border Lime Construction Ltd (Cumbria, UK), this suite equips site professionals, builders, and heritage property owners with accurate mix calculations, quantity estimators, and compliance checklists.

KEY SUITE FEATURES & PROFESSIONAL TOOLS:

1. LIME MORTAR & PLASTER MIX CALCULATOR
- Instant mix calculations for Natural Hydraulic Limes: NHL 2, NHL 3.5, and NHL 5.
- Formulations for traditional Non-Hydraulic Fat Lime Putty (CL-90S) and Pozzolanic additives.
- Computes exact material quantities: 25kg binder bags, sharp sand tonnage, water demand, and joint compaction allowances.
- Practical curing advice and weather protection guidelines.

2. STONE & BRICK MASONRY ESTIMATOR
- Calculates masonry units and mortar volume for single leaf, solid one-brick (215mm), cavity walls, and ashlar stone facing.
- Select traditional bond patterns: Stretcher Bond, English Bond, Flemish Bond, and Header Bond.
- Configurable wastage allowances (0% to 20%).
- Automatic deductions for door and window openings.

3. PROJECT PLANNER & COST BREAKDOWN
- Itemize contractor labor hours and daily rates.
- Track materials, scaffolding hire, and waste disposal costs.
- Apply contingency buffers and contractor profit margins.
- Generate instant project budget summaries for transparent client estimates.

4. INTERACTIVE SITE SAFETY & QUALITY AUDIT
- Practical checklist covering PPE (lime alkalinity eye and skin protection), dust control (FFP3 masks), and scaffolding guardrails.
- Real-time compliance score (%) with Pass, Flagged, and Fail status indicators.
- Timestamped audit logs saved directly on device.

5. HERITAGE CONSERVATION & DEFECT DIAGNOSTICS
- Diagnostic guides for salt efflorescence, spalling sandstone decay, and moisture entrapment caused by modern cement.
- Traditional lime pointing handbook: joint raking techniques, substrate pre-wetting, ironing, stippling, and curing.

6. ECO-BUILDING & CARBON CYCLE SCIENCE
- Carbon absorption calculator estimating atmospheric CO2 sequestered as lime carbonates back into limestone.
- Side-by-side environmental and breathability comparison between natural lime and Ordinary Portland Cement.

7. UK BUILDING STANDARDS & BS EN 459-1 REFERENCE
- Reference tables for European building lime classifications (BS EN 459-1).
- Guidelines aligned with UK Building Regulations: Part L (Conservation of fuel and power) and Part C (Resistance to moisture).

8. TECHNICAL MATERIAL DIRECTORY & UNIT CONVERTER
- Data sheets covering bulk densities, water requirements, and aggregate grading for sand, pozzolans, and hemp shiv.
- Bi-directional converter between Metric (meters, m2, m3, tonnes, litres) and Imperial (feet, sq ft, cu ft, yards, pounds, gallons).

9. LOCAL ESTIMATES HISTORY
- Save mix designs, wall quotes, and safety audit logs locally.
- One-tap summary copy to clipboard for client messaging and site notes.

COMPLIANCE & PRIVACY:
- Zero Dangerous Permissions: Respects device security with no location, camera, or contact permissions required.
- 100% Offline Functionality: Operates reliably in remote areas and restoration sites without internet.
- No Account or Login Required: Launch and start calculating immediately.
- No Third-Party Trackers: Private and distraction-free utility.