Non-Destructive Root Investigation Since 2005
Air Spade Root Investigation Glasgow | Non-Destructive Root Mapping
✓ Trading since 2005✓ BS3998 standard✓ Fully insured✓ Free quotes
Trading as Glasgow's tree specialists since 2005
NPTC Professional Tree Inspection qualified team
Free, no-obligation quotes on every enquiry
Non-Destructive Root Mapping for Glasgow Development Sites
When a footing, drive or extension is planned close to a mature tree in Glasgow, guessing where the roots run is a risk no one wants to carry into a planning application or a subsidence claim. Air spade root investigation uses compressed air, rather than a digger, to expose roots without cutting, crushing or bruising them, so what comes back is an actual root location plan instead of the standard stem-diameter calculation used when nobody has physically looked.
The same air spade and reporting process covers everything from a single tree next to a homeowner's extension to a multi-tree development site needing BS5837-standard evidence for planning, with the root map, photographic record and root collar findings built to feed straight into a structural engineer's or arborist's own paperwork rather than sitting as a stand-alone document.
What Our Air Spade Investigation Covers
- Air spade excavation using compressed air at around 1500mph to expose roots without cutting, crushing or bruising them
- Root architecture mapping and Root Protection Area documentation showing the tree's actual root spread rather than the standard stem-diameter calculation
- Root collar examination checking for decay-causing pathogens such as Armillaria (honey fungus) and Phytophthora
- Soil decompaction, organic matter incorporation and mycorrhizal fungi application where compacted ground is holding roots back
- Precision trenching through Root Protection Areas for utility runs, working around significant roots rather than through them
- Photographic evidence and a root location plan with GPS coordinates included in the final report
- Backfilling and root protection once excavation and recording is finished, so exposed roots aren't left open to the air
Not Included / Costed Separately
- Ground penetrating radar pre-scanning is priced as an add-on, roughly £200-£400, rather than built into a basic single-tree investigation
- A full BS5837 tree survey with planning-ready documentation sits at the higher end of the pricing structure and isn't part of a basic root investigation booking
- Construction-phase monitoring visits are billed per visit rather than included in the initial site work
- The investigation maps where roots actually are - it doesn't extend to designing the foundation or engineering solution around them, which stays with your structural engineer
- Any root pruning, remedial work or follow-up tree surgery identified during investigation is quoted and carried out as a separate job
How an Air Spade Root Investigation Runs, From Enquiry to Report
- Initial enquiry and scoping: We ask for the tree species and rough distance to the proposed works, whether a Tree Preservation Order or Conservation Area is involved, and what the findings need to support - a planning application, a subsidence claim or a contractor's method statement - so the free quote matches the actual job rather than a generic day rate.
- Site visit and access check: Before any digging, we check ground access for the truck-mounted compressor and agree which Root Protection Areas need investigating, then set a date - avoiding hard-frozen or waterlogged clay where possible, since both slow the air spade down.
- Air spade excavation: Compressed air at around 1500mph clears soil from around the root system without cutting, crushing or bruising roots, exposing root architecture and the root collar for direct examination rather than an estimate.
- Recording and root collar examination: Exposed roots are photographed and GPS-located, root spread is mapped against the actual Root Protection Area, and the root collar is checked for decay-causing pathogens such as Armillaria or Phytophthora.
- Backfilling and soil treatment: Once recording is finished, exposed roots are covered again - with soil decompaction, organic matter and mycorrhizal fungi worked in first if compacted ground has been restricting root growth - so the tree isn't left exposed any longer than the investigation needs.
- Report delivery and follow-up: The root location plan, photographic evidence and findings are written up and delivered ready to hand to your arborist or structural engineer; any root pruning or remedial tree work the investigation flags is quoted separately rather than assumed into the original booking.
What an Air Spade Root Investigation Costs in Glasgow
Pricing depends on how many trees are involved and how much documentation the project needs. A single-tree investigation around one proposed footing or extension typically runs £400-£800, while a multi-tree development site runs £800-£1,500. A ground penetrating radar pre-scan, useful on congested sites before the air spade work starts, adds roughly £200-£400. Where the investigation needs to feed into full BS5837-compliant planning documentation, the combined package runs £1,200-£2,500, and any construction-phase monitoring visits after the initial work are billed separately at £200-£500 per visit. These figures are a starting guide rather than a fixed price - the free site visit is where tree numbers, access and reporting needs get confirmed before a firm quote is given.
Which Level of Root Investigation Matches Your Project Stage
| Service Tier | What's Included | Price Guide |
|---|---|---|
| Single-tree investigation | Air spade excavation and root mapping around one proposed footing or extension | £400-£800 |
| Multi-tree development investigation | Multiple trees and Root Protection Areas mapped across a development-scale site | £800-£1,500 |
| Full BS5837 survey | Planning-ready documentation package - a separate, higher-tier service not included in a basic root investigation | £1,200-£2,500 (combined package) |
What a Root Collar Finding Actually Changes on Site
The value of an air spade investigation shows up in what happens after the soil is cleared, not just in the report itself. Root collar decay from Armillaria or Phytophthora is often impossible to spot until it has already spread through the root system, and a stem-diameter estimate or a hand-dug trial pit won't reliably catch it at that early stage - exposing the collar with compressed air lets the same crew that carried out the investigation see decay where it starts, then quote and carry out any remedial pruning or treatment directly, rather than passing the finding on to a second contractor who has to re-assess the tree from scratch. Where the ground itself is the underlying issue - compacted clay under a driveway, or shipyard-era made ground left over from Clydebank's industrial past - working organic matter and mycorrhizal fungi into the soil during backfilling tends to leave root growth healthier than before the dig started, rather than just mapped and covered back over.
Also Working West and East Dunbartonshire, East Renfrewshire and the Stirlingshire Villages
Glasgow itself accounts for most of this work - West End sandstone terraces and Southside extensions built close to mature street trees are the recurring job. Moving into West Dunbartonshire, the ground changes what the air spade is dealing with: Clydebank and Dumbarton have stretches of reclaimed Clyde-side and shipyard-era made ground, which behaves differently under compressed air than natural clay or loam, so it's checked on site rather than assumed from a desk. Bearsden, Milngavie, Bishopbriggs and Kirkintilloch bring a different problem - Victorian and Edwardian villa plots with shallow original foundations, now being extended or split, sitting close to root systems the original builders never accounted for. Giffnock, Clarkston, Newton Mearns and Barrhead in East Renfrewshire see the same shallow-foundation pattern on suburban infill sites. Further out, villages on the Campsie and Trossachs fringe - Strathblane, Killearn, Balfron, Fintry and Kippen - tend to have smaller sites but sit closer to hedgerow and woodland boundary trees protected for village character rather than individual orders, plus Bo'ness at the Falkirk edge of the area we cover.
Frequently Asked Questions
How long does a commercial root investigation take on site?
Timing depends on how many trees are involved, how large the Root Protection Areas are, and how much documentation the project needs - a single-tree check is a shorter job than a multi-tree development site with combined BS5837 reporting. We work out a realistic schedule during the free consultation once the scope is confirmed, rather than quoting a generic figure that might not fit your site.
Does the investigation itself need permission if a tree has a Tree Preservation Order?
Air spade investigation is a non-destructive assessment rather than tree surgery, so it sits outside the notice periods that apply to cutting or felling protected trees. If findings lead to root pruning or other work on a TPO tree, or the tree sits in a Conservation Area, the usual six weeks' notice for work on trees over 75mm diameter applies to that follow-up work, not to the investigation itself.
Is there a best time of year for air spade investigation?
Air spade work can go ahead across most of the year, but very wet clay ground or hard-frozen ground both make the compressed air less effective at clearing soil cleanly, which can extend time on site. Where timing is flexible, we'll flag if conditions on a particular site would make a different week more efficient.
What access do you need on site?
The main requirement is space to park the truck-mounted compressor reasonably close to the work area, since the air spade lance and soil vacuum run off it. Beyond that, normal site access for a small crew is enough - we'll confirm anything site-specific, like restricted hours or shared access with other contractors, during the consultation.
Will investigating the roots weaken or destabilise the tree?
No - that's the point of using an air spade rather than a digger. Compressed air clears soil without cutting through roots, and exposed roots are covered and kept moist while work is underway, then backfilled once recording is complete. Soil decompaction as part of the process often leaves the tree in better condition than before, by improving water and air movement around the roots.
Can you give evidence in court, or just a written report?
Both. The written report is the starting point, but where a subsidence claim or planning dispute goes to a tribunal or court, we can provide expert witness testimony backed by the same root mapping, photographic and soil condition evidence used in the report.
How far ahead of our planning submission should we book?
Book early enough that the findings can feed into your arborist's BS5837 report before the submission deadline, and - if the tree is in a Conservation Area - early enough to cover the six weeks' notice required for any related tree work. Leaving it until the week before submission usually means either a rushed report or a delayed application.
Book Before Groundworks Are Scheduled, Not After
Root investigation findings need time to feed into a BS5837 report or a structural engineer's foundation design, and if a tree sits in a Conservation Area, any follow-up work the investigation identifies still needs six weeks' notice before it can go ahead. Booking a free, no-obligation site visit early enough to allow for that gives your project a far better chance of staying on schedule than calling once the digger is already on order.
Get a Free Root Investigation Quote Booked This Week
A footing, drive or extension planned close to a mature tree rarely gets safer the longer root mapping is left until after groundworks are already scheduled - book a free, no-obligation site visit and get a written quote before the digger is on order.
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