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Table of Contents - Section 8 Condensation
Section 8NI-wide·Technical Booklet C Site Preparation and Resistance to Contaminants and Moisture
Section 8 Condensation 38 Interstitial condensation 38
condensationventilationInterstitial condensation control in dwellings
0.9NI-wide·Technical Booklet C Site Preparation and Resistance to Contaminants and Moisture
It is the view of the Department that the requirements of regulation 29 will be met if the floors, walls and roofs of a dwelling are designed and constructed to protect the dwelling from harmful effec
dwellingventilationDesign and construction guidance to avoid interstitial condensation
0.10NI-wide·Technical Booklet C Site Preparation and Resistance to Contaminants and Moisture
The guidance in Section 8 is to ensure that interstitial condensation in a dwelling is avoided by following the design and construction guidance given in the specified BS and BRE technical documents.
dwellingventilationVentilated air space requirements for suspended timber floors
5.13(c)NI-wide·Technical Booklet C Site Preparation and Resistance to Contaminants and Moisture
with a ventilated air space measuring at least 75 mm from the ground cover to the underside of any wall plates and at least 150 mm to the underside of the suspended timber floor (or insulation if prov
dwellingnon-domesticventilationaccessprotection-from-fallingSuspended concrete ground floors - damp proof membrane and ventilation
5.16NI-wide·Technical Booklet C Site Preparation and Resistance to Contaminants and Moisture
A suspended concrete ground floor should meet the requirement to resist the passage of moisture from the ground if it incorporates (see Diagram 5.4) – (a) a damp proof membrane; and (b) where there is
drainageventilationVentilation pipes and grilles specification
5.16NI-wide·Technical Booklet C Site Preparation and Resistance to Contaminants and Moisture
Any pipes needed to carry ventilating air should have a diameter of at least 100 mm. Ventilation openings should incorporate suitable grilles which prevent the entry of vermin to the subfloor but do n
drainageventilationVentilated cavity for impermeable cladding
6.24NI-wide·Technical Booklet C Site Preparation and Resistance to Contaminants and Moisture
Where cladding is impermeable to water vapour there should be a ventilated cavity behind it.
external-spaceprotection-from-moistureventilationVentilation behind timber-supported cladding
6.29NI-wide·Technical Booklet C Site Preparation and Resistance to Contaminants and Moisture
Where cladding is supported by timber components or is on the façade of a timber framed building, the space between the cladding and the building should be ventilated to ensure rapid drying of any wat
claddingprotection-from-moistureventilationtimber-framedVentilation behind impermeable cladding
7.4NI-wide·Technical Booklet C Site Preparation and Resistance to Contaminants and Moisture
Where cladding is impermeable to water vapour there should be a ventilated air space behind the cladding.
moisture-protectionventilation