Portfolio
HAD-01 · Al-Hadn
Ra‘oum Castle
Tower · 2 storeys · 281 m² W elevation built c. 1750estimated criticality 5/5
Latest capture
02 Aug 2026 · 94 d ago
Measured on this visit
4.7 mm
max crack width
8%
surface loss
20%
salt loading
Elevated
marker MK-HAD-01 · confidence 93% · S. Al-Makrami
Risk
0–100
56Elevated
stableintervene
Time to 5 mm2 months
Growth rate0.13 mm / month
Intervention estimateSAR 68,000
Findings
5 captures
Salt crystallisation
dominant mechanism on the last visit
Rising damp line at 34% RH
salt crystallisation risk band
W face exposed to prevailing wind
drives the wet–dry cycle above 44 °C
Crack width over time
mm · measured, then forecast
Dots are accepted captures. The dashed tail is a linear projection of the measured rate — it is what moves this structure up the intervention queue, not the current width alone.
Defects on the latest visit
02 Aug 2026
| Defect | Width | Length | Face | Mechanism | Drives risk |
|---|---|---|---|---|---|
| Defect 1 | 4.7 mm | 2,668 mm | E | Salt crystallisation | worst |
| Defect 2 | 3.1 mm | 1,247 mm | SW | Salt crystallisation | — |
| Defect 3 | 2.6 mm | 1,488 mm | NW | Structural crack | — |
| Defect 4 | 1.8 mm | 1,013 mm | SE | Water ingress | — |
The wall carries 4 separate defects at this visit. The widest one sets the risk band; the others are counted and carried in the record.
Capture ledger
5 accepted
| Date | Crack | Loss | Salt | RH | Mechanism | Captured by | Marker | Confidence |
|---|---|---|---|---|---|---|---|---|
| 02 Aug 2026 | 4.7 mm · +3 | 8% | 20% | 34% | Salt crystallisation | S. Al-Makrami | MK-HAD-01 | 93% |
| 09 Feb 2026 | 4.0 mm · +3 | 7% | 19% | 34% | Structural crack | S. Al-Makrami | MK-HAD-01 | 86% |
| 18 Aug 2025 | 3.3 mm · +3 | 6% | 14% | 78% | Salt crystallisation | S. Al-Makrami | MK-HAD-01 | 94% |
| 25 Feb 2025 | 2.5 mm · +3 | 7% | 12% | 69% | Water ingress | Field survey | MK-HAD-01 | 90% |
| 04 Sept 2024 | 1.7 mm · +3 | 4% | 13% | 30% | Salt crystallisation | Field survey | MK-HAD-01 | 87% |
Field note
Rock-built castle on the summit of Jabal Ra‘oum, reached by a stair; features remain legible. Guardian: S. Al-Makrami.
Site reference: Najran Municipality — أبرز معالم نجران.