Certified companies

W & C Glazing Contractors Limited
NI 0669/05

W Doherty Construction Limited
NI 1040/08

W J & H Crozier
NI 0079/03

W K K Electrical Services Ltd
NI 0624/04

W M Controls Limited
NI 1840/15

W R Jenkins & Company Limited
NI 0867/06

Walsin Limited
NI 0968/07

Wateresq Limited T/A Nu Line Utilities
NI 1116/08

Waterworx Pipeline & Civils Limited
NI1977/17

White Underfloor Heating Ltd
NI 1699/13

Wilson & Mawhinney Limited
NI 0430/04

Wilson Construction Services Ltd
NI1973/17

Wilson Services (NI) Limited
NI 1795/14

Windell Limited
NI 1053/08

Woodburn Engineering Contracts Ltd
NI 1614/13

Woodvale Construction Company Limited
NI 0080/03

Workman Lifts
NI 0705/05

Worksafe Electrical Services Ltd
NI 1549/12

Wray Engineering
NI 1761/14

WRB Energy Limited
NI 2005/18