The Border Stronghold
From Monmouth School estates to Wye Valley timber frames.
1. Get Free Quote
Submit your riverside address. We assess humidity risk and timber exposure.
2. Arrive & Pay
Accept the quote to book. Payment only taken on-site once flight safety is confirmed.
3. The 20-Min Scan
We inspect every eave, valley, and gutter for moss, blockages, and hidden damp.
4. Full Data Package
PDF Report + 4K video + Moss & Damp Map for insurers or conservation officers.
The "Hidden Damp" Guarantee
In the humid Wye Valley, ground surveys miss critical damp sources. If we find no actionable defects, you pay only 50%.
*Applies to timber-framed properties in NP25 and NP16.
TRACE & ACCESS FOR THE WYE VALLEY
Spot the invisible damp.
The Wye Valley’s humidity breeds moss, algae, and gutter blockages that lead to chronic damp in timber-framed homes. These issues are often invisible from ground level.
Our drone survey reveals what matters:
- ✅ Moss Growth Mapping: Identify saturated zones prone to water ingress.
- ✅ Gutter Blockages: Spot organic buildup causing overflow into eaves.
- ✅ Timber Rot Early Signs: Detect discolouration before structural damage.
Don't Ask a Roofer if You Need a New Roof
We are Independent Data Collectors. We don't fix roofs, so we have no incentive to "find" extra work.
1. The Incentive
The Roofer: Makes money by finding defects, selling materials, and increasing the job scope.
CalonTerra: We charge a fixed flat fee. Our price is the same regardless of what we find.
2. The Evidence
The Roofer: Often relies on verbal opinions or blurry ground photos.
CalonTerra: A downloadable Visual Condition Report with zoomed-in 4K evidence.
3. The Cost
The Roofer: You may pay for access (ladders) just for an estimate.
CalonTerra: A small fee for the truth. Only pay a tradesman to fix the damage you can see.
Owning a Timber-Framed Home in Monmouth?
"The damp keeps coming back."
Traditional surveys focus on internal symptoms, not external causes. Moss and blocked gutters on riverside properties are the real culprits.
The Solution: Aerial mapping of moisture sources to stop damp at the root.
Insurance & School Estates
Institutions like Monmouth Haberdashers require non-intrusive, evidence-based roof audits.
- ✅ High-Value Property Reports: Accepted by specialist insurers
- ✅ Riverside Risk Mapping: Document exposure to Wye humidity
- ✅ Non-Intrusive Method: No disturbance to historic fabric
Typical Defects We Expose
Moss & Algae Buildup
Traps moisture against timber eaves, causing chronic damp in humid valleys.
Timber Soffit Rot
Early discolouration visible only from above. Critical for preservation.
Chimney Cap Displacement
Allows rain ingress into flues — common in exposed riverside locations.
Lead Valley Failure
Thermal expansion in valley junctions causes splits — worsened by humidity.
Wye Valley Intelligence
Specific checks for Monmouth’s unique microclimate:
- Riverside Humidity Mapping: Identify high-moisture exposure zones
- Timber Frame Integrity: Non-contact inspection of historic structures
- School & Estate Audits: Discreet, out-of-hours surveys for institutions
- Conservation Officer Reports: Accepted by Monmouthshire Council
Monmouth Pricing
Zero Travel Cost for NP25, NP16. Riverside Surcharge Waived.
Basic Check
£145*
"Is my gutter blocked?"
- • 15 Minute Flight
- • Raw Images + Moss Map
*No travel fees for NP25/NP16
Full Condition Report
£265*
Most Popular.
- • Full Roof & Gutter Scan
- • PDF Condition Report
- • Hidden Damp & Moss Log
*Includes timber frame assessment
Estate Agents / Schools
Volume
High-Value Property Reports
- • Conservation Officer Submissions
- • Institutional Compliance
*Zero travel fees within NP25, NP16.
Pilot Certification & Insurance
Your assurance for a safe, compliant, and discreet survey.
CAA Operational Authorisation
Highest standard of UK CAA certification (GVC & A2 CofC).
- ✅ Fully Insured: £5M Public Liability.
- ✅ Riverside Trained: Humidity-aware flight protocols.
- ✅ GDPR Compliant: Data managed to strict ICO protocols.
NP25 Border Stronghold
Serving the Wye Valley with climate-specific expertise.
- 📍 Monmouth Town: Timber-Framed Core
- 📍 Wyesham: Riverside Estates
- 📍 Trellech: Historic Village
- 📍 Redbrook: Border Conservation
- 📍 Penallt: Valley Timber Homes
- 📍 Llandogo: Remote Riverside
Wye Valley Materials
Book Your Monmouth Riverside Survey
Mention "Timber Frame" or "Hidden Damp" for priority.