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Part K Ventilation

Part K Ventilation. Joseph Birt Specialist Support Officer South Eastern Group of Councils. Part K. Moisture from drying out . Part K - Ventilation. Background Aims to protect the health of people & buildings Last updated in 1998

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Part K Ventilation

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  1. Part KVentilation Joseph Birt Specialist Support Officer South Eastern Group of Councils

  2. Part K Moisture from drying out

  3. Part K - Ventilation Background • Aims to protect the health of people & buildings • Last updated in 1998 • Major revision required – to take account of the new thermal standards, and air tightness • Build tight & ventilate right

  4. Provision of outside air for breathing; • Dilution and removal of airbourne pollutants, including odours; • Control of access humidity Part K - Ventilation

  5. Regulations 64 to 68 64 – Application 65 – Adequate means of ventilation for people - Fixed mechanical ventilation systems (commissioning and testing [excluding basic fans]) 66 – Car parks 67 – Submission of test results: Air flow rates & commissioning 68 – Information to the occupier: Ventilation systems, maintenance requirements, and operational instruction. Also confirmation to Building Control

  6. Part K - Ventilation Ventilating a building is still primarilly through a combination of openable windows* (rapid), background (trickle vents) and mechanical extract Passive stack ventilation Whole building ventilation systems (with or without heat recovery) * Where an externally accessible rapid ventilation opening provides the sole means of night time cooling the issue of security should be considered.

  7. Part K - Ventilation Now it is guidance based, there is greater scope for ‘case-by-case’ solutions. [BS EN 1314 & BS 5250] Historic buildings get special consideration [BS 7913] You can chose to use other methods:

  8. Case Study Semi detached house

  9. Case Study : Method 2 (System 1) • The accommodation includes: • Entrance hall/stairway • Kitchen • Living • Dinging room • Three bedrooms • WC • Bathroom /wc • All rooms have external walls • The following are design assumptions: • Cooker has an extract hood • Gross volume is 210 M3 • Floor area is 84M2 • Design occupancy 4 persons • Windows (1.0m cill) (20Oopenable) • Design air permeability > 5

  10. Case Study : Method 2 (System 1)[Example: C5; Par. 2.12 to 2.40] • Background ventilators: • Table 2.4 - Ventilator area of 40,000 mm2 required • Two storey & cross ventilation possible thus, 40,000 mm2 OK • Ventilators located – evenly distributed • Rapid ventilation: • Refer to Appendix B • 20Oopenable angle thus 1/10 of floor area opening required • Caution – patio doors & security • Air transfer: • 7600 mm2 of undercut to the doors • Extract ventilation rate: • Table 2.1 – Choice of intermittent or continuous extraction • Suitable controls (par. 2.30 – 2.35) • Testing not required to basic fans

  11. Part K • Guidance has also been given for: • -the ventilation of basements in dwellings; • - requirements when a kitchen or bathroom is refurbished in an existing dwelling; • - when windows area replaced in an existing dwelling • - improved guidance on ventilation of car parks

  12. Part K Summary – • Mainly performance based approach • Range of methods of compliance • Testing and commissioning introduced • Provision of Information essential • Details to Building Control (5 days) • Dwellings - Domestic Ventilation Compliance Guide • Buildings other than dwellings - CIBSE Code M

  13. Part GResistance to the passageof Sound Joseph Birt Specialist Support Officer South Eastern Group of Councils

  14. Background • many complaints about the adequacy of sound insulation between homes • concerns about sound insulation between rooms within dwellings • concerns about noise in public circulation spaces in blocks of flats

  15. Background • calls to introduce mandatory sound insulation testing to demonstrate that reasonable standards have been achieved • concerns about sound insulation standards in schools due to a general increase in noise

  16. “Room for residential purposes” …means a room, or a suite of rooms, which is not a dwelling and which is used by one or more persons to live and sleep and includes a room in a hostel, a hotel, a boarding house, a hall of residence or a residential home, but does not include a room in a hospital or similar establishment, used for patient accommodation

  17. Overview of the main changes – • to set more onerous sound insulation standards, including a component to deal specifically with low frequency noise • to apply the requirements to dwellings and to rooms for residential purposes in hostel type accommodation • to control reverberation around the common parts of buildings containing flats or rooms for residential purposes • to require pre-completion testing for sound insulation, or to recognise proven “robust detail” solutions as an alternative to pre-completion testing

  18. Overview of the main changes – • to set requirements for the acoustic design of schools and colleges • to give notice in writing to the district council of the results of any sound insulation testing within 5 days after completion of the testing

  19. Performance standards – • the performance standards for separating walls, floors and stairs are given in Tables 1a and 1b of Technical Booklet G • the performance standards for new internal walls and floors are given in Table 2 of Technical Booklet G

  20. Technical Booklet G: • Section 2: Separating walls (& flanking construction) • Section 3: Separating floors (& flanking construction) • Section 4: Dwelling formed by change of use • Section 5: Internal walls & floors of new dwellings / buildings • Section 6: Rooms for residential purposes • …constructions, which, if properly designed and constructed, should provide reasonable resistance to the passage of sound (airborne, impact, flanking as appropriate). • Section 7: Reverberation in common parts of apartments

  21. Ensuring Performance: • regulation 53 requires pre-completion testing for sound insulation of walls and floors (not detached houses) testing is not necessary for every unit, but is required on a representative sample, selected by Building Control • regulation 48 exempts the need for sound resistant testing where “robust details” have been used in the design and construction

  22. Case Study Traditional NI Construction Semi-detached house Shared party wall

  23. Case Study Separating wall to comply with Section 2 Separating wall to comply with Section 2

  24. Possible wall constructionAttention to detail is criticalCareful product selectionBuilders need to stick to the specification

  25. Case Study Internal sound resisting walls in accordance with Section 5

  26. Possible internal wallplasterboard 10Kg/m2Staggered jointsAll gaps filledMin 75*mm wide stud Attention to detail is criticalCareful product selectionBuilders need to stick to the specification

  27. Remember…. the devil is in the detail(s) If your not sure, we are here to help !

  28. Thank you Joseph Birt Specialist Support Officer South Eastern Group of Councils

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