Portfolio
QAB-02 · Al-Qabil
Al-Lijam — mosque
Mosque · 1 storeys · 70 m² SE elevation built c. 1800estimated criticality 4/5
Latest capture
30 Jul 2026 · 97 d ago
Measured on this visit
0.9 mm
max crack width
4%
surface loss
7%
salt loading
Stable
marker MK-QAB-02 · confidence 90% · Field survey
Risk
0–100
19Stable
stableintervene
Time to 5 mm—
Growth rate0.03 mm / month
Intervention estimateSAR 23,000
Findings
6 captures
Water ingress
dominant mechanism on the last visit
Rising damp line at 65% RH
salt crystallisation risk band
SE 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
30 Jul 2026
| Defect | Width | Length | Face | Mechanism | Drives risk |
|---|---|---|---|---|---|
| Defect 1 | 0.9 mm | 493 mm | NE | Water ingress | worst |
| Defect 2 | 0.3 mm | 605 mm | N | Surface loss | — |
The wall carries 2 separate defects 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 |
|---|---|---|---|---|---|---|---|---|
| 30 Jul 2026 | 0.9 mm · +1 | 4% | 7% | 65% | Water ingress | Field survey | MK-QAB-02 | 90% |
| 25 Apr 2026 | 0.8 mm · +1 | 1% | 4% | 72% | Salt crystallisation | Field survey | MK-QAB-02 | 98% |
| 19 Jan 2026 | 0.7 mm · +1 | 2% | 5% | 66% | Structural crack | A. Al-Hadi | MK-QAB-02 | 95% |
| 14 Oct 2025 | 0.6 mm · +1 | 3% | 6% | 41% | Water ingress | A. Al-Hadi | MK-QAB-02 | 87% |
| 10 Jul 2025 | 0.5 mm · +1 | 2% | 6% | 45% | Salt crystallisation | Field survey | MK-QAB-02 | 86% |
| 05 Apr 2025 | 0.4 mm · +1 | 3% | 4% | 66% | Structural crack | A. Al-Hadi | MK-QAB-02 | 95% |
Field note
Congregational mosque of the Al-Lijam quarter. Guardian: A. Al-Hadi.
Site reference: Najran Municipality — أبرز معالم نجران.