The Steep Valley Corridor
From Abertillery’s vertical streets to Brynmawr’s narrow accesses.
1. Slope Assessment
We calculate vertical drop between front and back. If it’s >8m, scaffolding is unsafe and costly.
2. Arrive & Pay
Accept the quote to book. To prevent fraud, payment is only taken upon arrival once flight safety is confirmed.
3. The Hidden Valley Scan
We use quiet drones to inspect the valley gutter between terraces—seen by no human since the 1970s.
4. Receive Data Package
You receive a PDF Condition Report and a link to every raw image & 4K video to show your insurer or roofer.
The "Hidden Valley" Guarantee
If your property has a vertical drop steeper than 30 degrees, scaffolding is not viable. We provide the only safe inspection method. If we cannot fly due to terrain, you do not pay a penny untill we reschedule.
*Disclaimer: Rescheduled visits are billed at the original quoted rate.
THE SCAFFOLD KILLER
No more £1,200 access fees.
In Abertillery, some houses have a **30ft vertical drop** from front door to back door. Scaffolding costs £1,000+ and takes days to erect—often requiring road closures.
Our drone eliminates all that risk and cost:
- ✅ Hidden Valley Gutter: Inspect the critical junction between two terraces
- ✅ Rear Upper Chimneys: See stacks invisible from ground level
- ✅ Drainage Mapping: Identify failed falls on steep rear roofs
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: "Trust me, mate." (Verbal opinion or a blurry phone photo).
CalonTerra: A downloadable Visual Condition Report with zoomed-in 4K photos of every crack, slip, and seal.
3. The Cost
The Roofer: You pay for scaffolding just to *look* at the problem (£1,200+).
CalonTerra: You pay a small fee for the truth. You only pay a tradesman to fix the specific damage you can actually see.
Owning a Terrace in Abertillery?
"The roofer said it's impossible to inspect the back."
Narrow rear accesses and extreme slopes make traditional inspections unsafe or impossible. Standard surveys miss the critical valley gutter between terraces.
The Solution: Aerial evidence of the "Hidden Valley" without setting foot on your property.
Insurance & Storm Damage
Insurers demand proof of damage on hard-to-access properties.
- ✅ HD Evidence: 4K photos of slipped tiles on rear upper roofs
- ✅ Date-Stamped Data: Proof of when the damage occurred
- ✅ Independent Validation: We don't profit from the repair
Typical Defects We Expose
Hidden Valley Gutter Leaks
Blocked or split gutters between terraces cause chronic damp. Invisible from ground.
Rear Upper Chimney Erosion
Mortar failure on chimneys only visible from above.
Steep-Roof Drainage Failure
Poor falls cause water ingress on rear pitches.
Upper Soffit Rot
Driving rain penetrates eaves on exposed upper levels.
Abertillery Steep-Slope Intelligence
Our drones are calibrated to spot specific defects common to the Steep Valley Corridor:
- Abertillery Terraces: Hidden valley gutters between stacked homes
- Brynmawr Access: Narrow rear lanes with zero ground visibility
- Blaina Slopes: 45°+ rear pitches with drainage failure
- Llanhilleth: Upper-level chimney stacks on multi-storey builds
Abertillery Pricing
Base Rate (Zero Travel Cost for NP13/NP23 Postcodes).
Basic Check
£145*
"Is my rear chimney okay?"
- • 15 Minute Flight
- • Raw Images Provided
- • Single issue check
*No travel fees for NP13/NP23
Full Condition Report
£265*
Most Popular.
- • Full Roof & Valley Gutter Scan
- • PDF Condition Report
- • Defect Highlighting
- • For Standard 3-Bed Terrace
*Zero travel cost for NP13/NP23 postcodes
Steep-Slope Audit
From £345
Multi-Terrace | Hidden Valley Mapping
- • Full Valley Corridor Scan
- • Party-Wall Documentation
- • Insurance-Grade Evidence
*No hidden travel fees for NP13/NP23 postcodes.
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.
- ✅ Steep-Slope Certified: Specialized flight logic for extreme inclines
- ✅ GDPR Compliant: Data managed to strict ICO protocols.
NP13/NP23 Steep Corridor
Serving the most vertically challenging housing in Wales.
- 📍 Abertillery Town
- 📍 Brynmawr Heights
- 📍 Blaina Slopes
- 📍 Llanhilleth
- 📍 Nantyglo
- 📍 Six Bells
Steep-Slope Materials
Book Your Abertillery Survey
Mention "Hidden Valley" or "Steep Slope" for priority.