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HAD-02 · Al-Hadn
Al-Hadn village — mosque
Mosque · 1 storeys · 197 m² W elevation built c. 1800estimated criticality 4/5
Latest capture
17 Oct 2026 · 18 d ago
Measured on this visit
3.0 mm
max crack width
5%
surface loss
13%
salt loading
Watch
marker MK-HAD-02 · confidence 89% · Field survey
Risk
0–100
41Watch
stableintervene
Time to 5 mm11 months
Growth rate0.18 mm / month
Intervention estimateSAR 39,000
Findings
6 captures
Salt crystallisation
dominant mechanism on the last visit
Rising damp line at 73% 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
17 Oct 2026
| Defect | Width | Length | Face | Mechanism | Drives risk |
|---|---|---|---|---|---|
| Defect 1 | 3.0 mm | 2,305 mm | S | Salt crystallisation | worst |
The wall carries 1 separate defect at this visit. The widest one sets the risk band; the others are counted and carried in the record.
Capture ledger
6 accepted
| Date | Crack | Loss | Salt | RH | Mechanism | Captured by | Marker | Confidence |
|---|---|---|---|---|---|---|---|---|
| 17 Oct 2026 | 3.0 mm | 5% | 13% | 73% | Salt crystallisation | Field survey | MK-HAD-02 | 89% |
| 23 Jul 2026 | 2.6 mm | 5% | 16% | 71% | Salt crystallisation | Field survey | MK-HAD-02 | 88% |
| 27 Apr 2026 | 1.9 mm | 5% | 11% | 51% | Surface loss | Field survey | MK-HAD-02 | 89% |
| 31 Jan 2026 | 1.5 mm | 3% | 7% | 70% | Surface loss | Field survey | MK-HAD-02 | 93% |
| 05 Nov 2025 | 1.0 mm | 3% | 7% | 46% | Surface loss | Field survey | MK-HAD-02 | 90% |
| 11 Aug 2025 | 0.4 mm | 2% | 3% | 31% | Water ingress | S. Al-Makrami | MK-HAD-02 | 95% |
Field note
Village mosque at the foot of Jabal Ra‘oum. Guardian: S. Al-Makrami.
Site reference: Najran Municipality — أبرز معالم نجران.