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Where is the membrane applied?

WITH A HPV WEATHERPROOF

For roofs with a ventillated HPV underlay

WITH A NON-HPV WEATHERPROOF

For roofs with a ventillated non-HPV underlay

SARKING VENTILATED

For insulation installed above the rafters

NO VENTILATED AIR CAVITY

For roofs without a ventilation gap

AIRTIGHTNESS

Inside

WEATHERPROOF

Outside

Inside or Outside

Inside or Outside

Outside

Inside

Inside or Outside

WALL

Inside