Elements for roof ventilation

Ventilation, waterproofing, airtightness
Elements for roof ventilation
Under-ridge elements
Accessories for ventilation
Connections for chimneys and walls
Breathable membranes and vapour control layers
Breathable roof membranes – Protector Line
Breathable roof membranes – Superior Line
Breathable roof membranes – Eurostandard Line
Separating layers for metal roof coverings
Breathable wall membranes
Vapour control layers – Superior Line
Vapour control layers – Eurostandard Line
Vapour barriers
Auto-adhesive protective screens and membranes
Breathable fire protection screens and membranes
Temporary rain sheets
Waterproofing, air and wind tightness
Acrylic adhesive tapes
Butyl adhesive tapes
Bituminous adhesive stripes
Foams and sealants
Sealing tapes and glues
AIR Stop Line
Seals for windows
Accessories
Systems for flat and green roofs
Membrana sintetica EVALON
EVALON
Accessori
Membrane sintetiche T-PE, T-Plan, Enkolan, ELLE-Plan
T-PE-Plan
T-Plan
Enkolan
ELLE-Plan
Completamento del pacchetto di copertura
Strati tecnici e drenanti
Profili metallici
Profili frontali
Profili coprimuro
Profili di collegamento
Tecnologie di finitura
Tetto verde
Fall protection systems
Sicurezza Residenziale
Sicurezza Industriale
Temporary safety on site
Sicurezza – Sistemi anticaduta
Linea Vita RED
Parapetti anticaduta
Linea Combisafe
Reti anticaduta
Ponteggi – Altrad Baumann
Ponteggi
Attrezzatura tecnica per cantiere
Attrezzatura tecnica
Macchinari da elevazione GEDA
Scale e trabattelli
Scale multifunzione
Trabattelli
Contenitori e cantilever
Barelle di trasporto
Contenitori multiuso
Cantilever
Ventilated facade cladding
Compositi in alluminio
Rivestimenti in HPL

In warm weather, temperatures can easily reach up to 80° C between the insulation and the roof covering. The hot air spreads to the rooms beneath the roof, negatively affecting the room temperature. In the cold and humid winter months, the external (cold) air meets the internal (warm) air in the cavity between the insulation and the roof covering causing condensation. Only correct air circulation where air enters through the eaves and escapes at ridge level can resolve this problem and prolong the life of your roof.

How to ventilate the roof:

Eaves vents: the air vent section in the eaves line must equate to at least 2% of the relative roof pitch and in any case, must not be less than 200 cm2/m.

Riwega advises 600 cm2/m.

On the ridge and hip: the air vent section in the ridge/hip lines must equate to at least 0.5% of the relative roof pitch in order to increase the pressure and trigger the Venturi effect.

Riwega advises 145 cm2/m. (approximately 25% of the 600 cm2/m opening)

Under the roof covering: the air vent section between the roof cover and the insulation must be more than 20 mm high and no less than 200 cm2/m along the pitch length.

Riwega advises at least 60 mm