Every rule your project must meet, found for you.
Search Northern Ireland’s planning and building-control guidance, ask a question in plain English, or generate a project compliance checklist — every answer cited to the source.
Working to a specific project? Generate a compliance checklist →
Answers, with citations
Ask in plain English and get an answer that links to the exact source clause — never an unsourced guess.
Scoped to your council
Overlay a council's local development plan on the Northern Ireland-wide regulations and policy.
Project compliance checklist
Characterise a project and get the requirements that apply, grouped by work area. Try it →
The library
Search the source guidance
21 results · filtered
Rooflight
NI-wide·Technical Booklet E Fire Safety
Rooflight – a domelight, lantern light, skylight, ridge light, glazed barrel vault or other element intended to admit daylight through a roof.
glazingEmergency egress windows - dimensions and positioning
2.9NI-wide·Technical Booklet E Fire Safety
An emergency egress window should – (a) have a clear opening that is not less than 0.33 m2 in area; and (b) have a clear opening that is at least 450 mm high and at least 450 mm wide. The lower edge o
dwellingmeans-of-escapeglazingGlazing in existing stairway enclosure
2.19NI-wide·Technical Booklet E Fire Safety
Any glazing (whether new or existing) in the enclosure of the existing stairway, other than to a bathroom or sanitary accommodation, should be fire-resisting. (See Tables 2.8, 4.1 and 4.2.)
dwellingfire-safetyglazingstairsEmergency egress windows in new storey habitable rooms
2.22NI-wide·Technical Booklet E Fire Safety
Each habitable room in the new storey should have – (a) an emergency egress window which complies with paragraph 2.9; or (b) an emergency egress dormer window or roof window, of the size given in para
dwellingfire-safetymeans-of-escapeglazingExternal stairs as part of escape routes - weather protection and fire-resisting construction
2.76NI-wide·Technical Booklet E Fire Safety
Where an external stair is part of an escape route – (a) the stair should be protected from the weather when it serves a floor or flat roof more than 6 m above ground level. The degree of protection f
fire-safetymeans-of-escapestairsglazingLimitations on the use of uninsulated glazing in enclosures and fire doors
Table 2.8NI-wide·Technical Booklet E Fire Safety
Table 2.8 Limitations on the use of uninsulated glazing in enclosures and fire doors Position of glazed element | Permitted extent of glazing in parts of a building with access to – A single stair |
fire-safetyglazingmeans-of-escapedwellingflatsnon-domesticLimitations on uninsulated glazing in enclosures and fire doors - All other purpose groups
Table 2.8NI-wide·Technical Booklet E Fire Safety
Position of glazed element: Permitted extent of glazing in parts of a building with access to – A single stair / More than one stair Walls / Door leaf / Walls / Door leaf 10 Adjacent an external esc
fire-safetyglazingmeans-of-escapeFire resistance of escape route enclosures
2.85NI-wide·Technical Booklet E Fire Safety
Details of fire resistance test criteria and standards of performance are given in Section 4. All walls, partitions and other enclosures (including roofs that form part of an escape route) required to
fire-safetymeans-of-escapeglazingVision panels in doors
2.91NI-wide·Technical Booklet E Fire Safety
A glazed vision panel, or panels of not less than 0.1 m2, should be provided in a door that subdivides a corridor, or where a door swings both ways. The vision panel or panels should include – (a) a l
fire-safetymeans-of-escapeglazingDefinition of wall for fire safety purposes
3.9NI-wide·Technical Booklet E Fire Safety
For the purposes of the performance of wall and ceiling linings – (a) a wall should include – (i) the surface of glazing (except glazing in a door); and (ii) any part of a ceiling which slopes at an a
fire-safetyglazingDefinition of wall surface for fire classification
3.10(b)NI-wide·Technical Booklet E Fire Safety
a wall should not include – (i) doors and door frames; (ii) window frames and frames in which glazing is fitted; (iii) architraves, cover moulds, picture rails, skirtings and similar narrow members; a
fire-safetyglazingDefinition of ceiling surface for fire classification
3.10(c)(d)NI-wide·Technical Booklet E Fire Safety
a ceiling should include – (i) the surface of glazing; and (ii) any part of a wall which slopes at an angle of 70º or less to the horizontal; and a ceiling should not include – (i) trap doors and thei
fire-safetyglazingRooflights – Material classification and size limits
3.14NI-wide·Technical Booklet E Fire Safety
Other than in a protected stairway a rooflight may be of a classification lower than the relevant Class given in Table 3.1 provided that – (a) where it is – (i) a plastic material which has a lower su
fire-safetyglazingprotection-from-fallingWindows and internal glazing in circulation spaces and rooms
3.15NI-wide·Technical Booklet E Fire Safety
A window in the external wall of a circulation space and all internal glazed areas should be glazed with a material having a classification not lower than that given in Table 3.1. A window in an exte
fire-safetyglazingnon-domesticdwellingLimitations on Class 3 plastic rooflights and thermoplastic rooflights and lighting diffusers in suspended ceilings
Table 3.2NI-wide·Technical Booklet E Fire Safety
Table 3.2 Limitations on Class 3 plastic rooflights and thermoplastic rooflights and lighting diffusers in suspended ceilings | Minimum classification of lower surface | Use of space below rooflight
fire-safetyglazingdwellingnon-domesticGlazed screens in protected shafts
4.26NI-wide·Technical Booklet E Fire Safety
Glazing may be incorporated in the wall between a protected shaft containing a stairway, and a corridor or lobby which gives access to that stairway provided that – (a) the protected shaft is not a fi
fire-safetycompartmentationglazingstairsCavity barriers around window and door openings
Table 4.6, Note 5NI-wide·Technical Booklet E Fire Safety
Cavity barriers provided around window or door openings may be formed by window or door frames (see paragraph 4.38).
fire-safetyglazingWindow and door frames exemption
5.5(d)NI-wide·Technical Booklet E Fire Safety
as per regulation 23(3), window and door frames and associated glass (including laminated glass) are exempted from regulation 23(2). Window spandrel panels and infill panels must comply with regulatio
fire-safetyglazingThermoplastic materials and unwired glass in rooflights
5.23NI-wide·Technical Booklet E Fire Safety
Where a thermoplastic material cannot be given a designation when tested to BS 476: Part 3 it may be used as a rooflight provided that it can be classified under paragraph 3.5 and is used in accordanc
fire-safetyglazingnon-domesticdwellingTP(a) and TP(b) plastic rooflights – Limitations on use and boundary distance
Table 5.9NI-wide·Technical Booklet E Fire Safety
Table 5.9 TP(a) and TP(b) plastic rooflights – Limitations on use and boundary distance Minimum classification on lower surface (1) | Space which rooflight can serve | Minimum distance (m) from any p
fire-safetyhrbglazingLimitation on areas and spacing of certain thermoplastic rooflights
Diagram 5.6NI-wide·Technical Booklet E Fire Safety
Limitation on areas and spacing of certain thermoplastic rooflights rooflight max. area 5 m² 3 m minimum between any two rooflights in any direction Notes: Or group of rooflights amounting to not mo
fire-safetynon-domesticglazing