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Cable Glands UK | UK distributor

Fill concrete core holes from above — faster and safer

HoleMole is a three-stage core-hole filling system designed to help contractors support and fill concrete openings from the working level. It reduces the need to access the floor below, fix temporary boards or bring in additional access equipment for routine openings.

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  • Install from above
  • Five Mole sizes
  • For 50–317 mm holes
HoleMole Contractor Starter Kit with Moles, stand, chute and threaded rods Exclusive Distributor – UK, Europe & Middle East
3 steps Lower, secure and fill from the working level
5 sizes A practical range for common concrete core holes
2–12.5 in Approximately 50–317 mm opening coverage
From above Helps reduce access and disruption on the floor below

A smarter core-hole repair method

Prepare concrete core holes without boarding from below

HoleMole uses a collapsible galvanised-steel former that is lowered through the opening and pulled back against the underside of the slab. A reusable stand, fast-action SpeedNut and formed chute then let the installer support and fill the opening from the same working level.

  • Helps remove the routine need to fix plywood beneath the opening.
  • Reduces repeated trips to the floor below and the associated work-area disruption.
  • One-way folding sections pass through the hole, then seat below the slab.
  • Suitable for use with an approved non-shrink grout or specified repair material.
Manufacturer recognition Winner of Most Innovative Products at World of Concrete STAFDA Specialty Tools and Fasteners Distributors Association
HoleMole stand and chute supporting a core-hole former beneath a concrete slab
Core-hole support installed from the working level

Method comparison

See HoleMole beside traditional shuttering

This short comparison shows why contractors use HoleMole to support suitable concrete cores from the work floor. It contrasts the reusable above-slab setup with the access, boarding and repeated movement associated with fixing shuttering underneath.

How to use HoleMole

The HoleMole 3-step process

Select the Mole that overlaps the opening correctly, prepare the concrete and repair material to the project specification, then complete these three stages.

Full installation demonstration

Watch the complete floor-core installation

Follow the horizontal HoleMole method from lowering the selected former and seating it beneath the slab to securing the stand, placing the repair material and removing the reusable equipment at the specified stage.

Lower the Mole through the opening

Attach the threaded rod to the correctly sized Mole. Fold the one-way sections and lower the former through the core hole. Once it has cleared the underside, pull the rod upwards so the Mole seats firmly below the slab. Prepare the opening in line with the site specification.

HoleMole former being lowered through a concrete core-hole opening

Secure it with the Mole Stand

Place the stand over the opening and guide the threaded rod through its centre slot. Press the SpeedNut plunger, slide the nut down the rod, then release and turn it to final-tighten. The former is now held securely in position ready for filling.

HoleMole former secured beneath a concrete opening with the support stand

Fill, finish and remove the stand

Slide the Speed Chute into the stand and place the specified repair material through it into the opening. Finish the material flush with the surrounding surface. After it has achieved the required set, remove the reusable stand and trim or break off the rod as directed by the approved method statement.

Concrete core hole being filled using the HoleMole support system

Vertical opening method

See the Wall Applicator in use

The manufacturer’s wall method uses a dedicated applicator and SpeedNut to retain a compatible Mole at a vertical concrete opening. Watch how the former is introduced, opened behind the wall and secured from the accessible face before a suitable vertical-grade repair material is placed.

Project-scale example

Why repeatability matters across many core holes

This live-site example discusses a programme involving roughly 150 to 175 concrete openings. It shows where a consistent above-slab method can help teams reduce repeated access changes and organise reinstatement across a larger work area.

Shop HoleMole

Choose the right system component

HoleMole 1/4in-20 Coupling Nut – Threaded Rod Extension

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HoleMole 1/4in-20 Coupling Nut – Threaded Rod Extension

£0.84
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HoleMole 24in All-Thread Rod – 1/4in-20 Aluminium

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HoleMole 24in All-Thread Rod – 1/4in-20 Aluminium

£3.00
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HoleMole SpeedNut – Quick-Release Threaded Rod Fastener

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HoleMole SpeedNut – Quick-Release Threaded Rod Fastener

£29.94
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HoleMole Speed Chute – Core-Hole Filling Accessory

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HoleMole Speed Chute – Core-Hole Filling Accessory

£41.94
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HoleMole Wall Applicator with SpeedNut – Vertical Core Holes

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HoleMole Wall Applicator with SpeedNut – Vertical Core Holes

£119.94
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HoleMole Mole Stand with SpeedNut – Core-Hole Support

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HoleMole Mole Stand with SpeedNut – Core-Hole Support

£119.94
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HoleMole Contractor Starter Kit – 50–317mm Core Holes

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HoleMole Contractor Starter Kit – 50–317mm Core Holes

£466.80
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HoleMole #5 Core Hole Former – 9.5–12.5in (240–317mm)

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HoleMole #5 Core Hole Former – 9.5–12.5in (240–317mm)

£27.60
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HoleMole #4 Core Hole Former – 6.75–9.5in (170–240mm)

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HoleMole #4 Core Hole Former – 6.75–9.5in (170–240mm)

£25.20
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HoleMole #3 Core Hole Former – 4.5–6.75in (115–170mm)

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HoleMole #3 Core Hole Former – 4.5–6.75in (115–170mm)

£21.60
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HoleMole #2 Core Hole Former – 3–4.5in (75–115mm)

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HoleMole #2 Core Hole Former – 3–4.5in (75–115mm)

£19.20
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HoleMole #1 for 50–75mm concrete core holes

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HoleMole #1 for 50–75mm concrete core holes

£18.00
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Installation must follow the approved project specification and site method statement. Confirm the suitability of the selected repair material and any structural, fire, acoustic, waterproofing or temporary-works requirements before use.