Breathable roof membrane · wholesale
EuConX BD70 breathable membrane Sd 0.02 m, for the cold side.
Breathable roof membrane for pitched roofs and loft floors, on the cold side of the insulation. Supplied to dealers, contractors and programmes with CE marking and a Declaration of Performance.
- Sd value
- 0.02 m
- Mass
- 70 g/m²
- Roll
- 1.6 × 100 m
Place in the build-up
Loft floor: tight below, open on top
EuConX BK45 vapour control layer
On the slab, under the wool, on the warm side. Sd 20 m; overlaps taped, wall joints turned up.
25 cm glass wool
ODE Starflex, 2 × 12.5 cm, second layer cross-laid, λD 0.039 W/(m·K).
EuConX BD70 breathable membrane
On top of the wool, on the cold side. Sd 0.02 m; vapour escapes, dust and draughts stay out.
The order cannot be reversed: a vapour-tight sheet on top of the wool traps the vapour coming up from the rooms. The Hungarian EKR catalogue asks for at least Sd 20 m under the wool and at most Sd 0.03 m on top (Decree 18/2025 EM, annex).
On a pitched roof
As a roof underlay over the rafters, fixed with counter-battens. Vapour from the structure escapes outwards, and the membrane protects against draughts and wind-driven water droplets.
From the Declaration of Performance
Technical data
Declaration of Performance (PDF)(opens in a new tab)- Role
- Breathable roof and facade membrane, on the cold side
- Sd value (TS EN ISO 12572)
- 0.02 m; also 0.02 m after ageing (70 °C, 12 weeks)
- EKR requirement on top of the wool
- at most 0.03 m
- Mass per unit area (EN 1849-2)
- 70 g/m²
- Resistance to water penetration (TS EN ISO 811)
- 259 mm H₂O
- Tensile strength MD / CMD (EN 12311-1)
- 175 / 100 N/5 cm
- Elongation MD / CMD
- 65 / 58 %
- Resistance to tearing (TS EN 12310-1)
- 90 N
- Reaction to fire (EN 13501-1)
- E
- Roll (EN 1848-2)
- 1.6 m wide, 160 m²
- Harmonised standard
- TS EN 13859-1/-2:2014, CE
- Declaration of Performance
- DOP-BBARIYER-L4S-BD70/082025-01
How we supply
Any volume, delivered across Hungary
From a pallet to a truckload
For one site, a dealer's stock or a phased programme. The quote fixes the volume.
Under your own brand
Membrane and label in your brand; you approve the print before production. Private label roof membranes
Nationwide delivery
We have delivered to every county in Hungary. The delivery window is confirmed in writing.
3–5 days from Turkey
Road transit from Turkey to Hungary. When the lot is not in stock, order to site takes 1–2 weeks.
Related
Finished work, partner supply, the other membrane
- Attic floor insulation at 12 700 Ft/m²Gross price (10 000 Ft net): EuConX BK45, 25 cm glass wool, EuConX BD70. Final price after a survey; our contractor partner works nationwide.
- Wekerle+ material supplyFor contractors, renovation firms and wholesalers, ahead of the February 2027 launch.
- EuConX BK45 vapour barrierUnder the wool, on the warm side: Sd 20 m, 45 g/m².
Quote
Send us the square metres; we reply the same working day.
Tell us the volume, any branding and the delivery address. The Declaration of Performance comes with the quote.