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Envico Specialised Mouldings GRP (glass reinforced plastic) Composite doors, offer a fixable lightweight design solution with the benefit of minimal maintenance, no rust or corrosion and its ability to with stand natural weather conditions without warping or swelling, while providing a sufficient level security. Making them the standard approved and preferred choice of door for the UK’s leading utility providers.

Envico Engineering Limited are the only GRP manufacture approved to supply doors to both UK Power Networks and GTC.

GRP(Glass Reinforced Polymer) composite door with Galvanised steel frame complete with GRP louvred Vents


 UK Power
(Type A)
UK Power
(Type B)
To suit Opening (width) mm 2686 2160 2710
To suit Opening (height) mm 2550 2175 2550
Louvre Vents qty/leaf 2 2 2
Louvre Vents (width) mm 550 550 550
Louvre Vents (height) mm 750 750 750
Door Standard Colour 08-B-21 Buff 08-B-21 Buff 08-B-21 Buff



Exterior Security Doors

UKPN (Type A) / GTC Standard Door

GRP (glass reinforced plastic) Composite door with galvanised steel frame, complete with GRP Louvered Vents (2no. per door leaf) and ironmongery excludes pad locks

Door to Suit Structural Openings of:-

  • 2686mm W x 2550mm H as specified on UKPN Standard Drawings

Reference codes SO3971G, SO3970X and SO3975R

  • 2710mm W x 2550mm H as specified on GTC Standard Drawings

Along with the GRP (glass reinforced plastic) Composite doors Envico Specialists Mopuldings are the apporved suppliers of Standard vents for UKPN and GTC substations.

Louvered SteelVents within Galvanised Steel Frame, hving dimensions of 550mm W x 750mm H.

Standard colours available as per UKPN/GTC specification 08-B-21 Buff other colours available upon request.



In addition to standard range quoted we are able to provide doors to fit structural openings different to above. These special doors are supplied with a choice of locking systems, hasp and staple, cylinder night locks or ESPAG two point locking.

Envico doors are maintenance free and self coloured.
Doors are fitted with top quality hinges with a variety of lock options including yale type and hasp & staple for padlocking.
Door finish can be in any of the colours in the BS4800, RAL range or in Wood effect.
Louvre vents can be fitted.
Size to customers order with reinforcement and acoustic protection as required.

Steel and LPCB Certified Doors

New LPCB certified security doors available to SR Levels 2,3 & 4 are available from our sister company PSFWales(www.psfwales.co.uk). The construction of both single and double doors have been tested to LPCB Levels 2,3 and 4 of LPS1175 Issue 6: Specification for Testing and Classifying the Burglary Resistance of Building Components.

Working in partnership with our sister company PSF Wales, Envico Engineering are able to supply LPCB certified Doors which are certified to Level 4 LPS

With in house design and engineering support a wide range of materials are used to suit individual specifications and requirements.
Envico Engineering has established a customer base which reflects our commitment to quality and to providing solutions through innovation and expertise.