|Lacuna bifold doors, Passivhaus suitable folding sliding (bi-fold) doors, with Class 4 airtightness and U-values from 0.85W/m²K. Find out more here or contact us, sending details of your project (schedule, elevations and plans).|
Energy efficient and environmentally sound, Danish built Lacuna Passivhaus suitable bi-fold triple-glazed doors, opening to patios and balconies, with Class 4 airtightness and U-values from as low as 0.7W/m²K. Building to the passivhaus standard no longer means sacrificing the aspiration of many self-builders and designers to create an inside-outside space.
Passivhaus Store mostly ships direct from supplier to you to minimise transport, reduce lead-in time and avoid costly double handling of goods. If your order contains products despatched from more than one source, our delivery cost calculator will add up each delivery charge to give you a total delivery cost. Note that our policy is simply to pass on the cost of delivery to you, not to use delivery charges to make hidden profits.