Category
Meter Boxes
Specialist meter boxes and overboxes are used where a standard plastic meter housing won't fit, or where extra protection is needed. They're commonly specified for external wall insulation (EWI) retrofits — where the original recessed meter box ends up buried in the new insulation — and as fire-rated overboxes where meters sit inside a building or fire separation has to be maintained.
An overbox fits over the existing meter, so it stays accessible while the wall keeps its insulation line.
1 HOUR FIRE RATED
Fire Rated Electric Meter Overbox | Picture Frame
- Zintec Steel, white finish
- Fits: Wall Only
EXTERNAL WALL INSULATION | FIRE RETARDANT
External Electricity Meter Box | N/A
- Zintec Steel, white finish
- Fits: Wall Only
- Insulated: 0.35 U Value
Meter boxes for EWI retrofit
When external wall insulation goes on, the original recessed gas or electric meter box gets buried under the new insulation layer — leaving the meter inaccessible and breaking the insulation line around it. An EWI meter box (or overbox) solves both: it fits over the existing meter so it stays readable and serviceable, while maintaining the insulation and draught-proofing of the EWI system. That keeps the retrofit compliant with building regulations and protects the building's thermal performance — without the cost and disruption of relocating the meter.
Fire-rated meter overboxes
Where a meter is located inside a building, or fire separation has to be maintained, a fire-rated electricity meter overbox adds a layer of protection. It's built to contain and slow the spread of fire, with intumescent seals that expand under heat to close gaps and protect the interior — important in multi-occupancy buildings and any property with specific fire-safety requirements. See our fire-rated electric meter overbox for the current spec.
Built to last — a note on coastal use
Our meter boxes and overboxes are robust, secure and made to fit seamlessly over existing meters. One important note: because of the raised corrosion risk, the standard guarantee doesn't cover installation within 10km of the coast — for coastal locations we recommend Grade 316 stainless steel, so get in touch and we'll sort the right option.