A new lightweight I-beam-based loft conversion system has been successfully trialled and is now set for market roll-out.

I-Loft has been developed by engineered timber connector specialist Simpson Strong-Tie and has been tested by Gallery Loft Conversions (GLC).

The system is based on a structural steel joist end connector which allows a new loft floor to be supported on I-beams, rather than heavy steel joists.

The I-beams are cut to fit under the roof eaves, using the connector as a template.

“You only have to remove rows of tiles at the front of the house to install the beams and connectors,” said Simpson Strong-Tie’s Chris Sanders. “You’re not having to knock a hole through the wall, as you do with a 180kg RSJ and you can handle the I-beams manually.”

He added that GLC managed to install I-Loft in a day.

Simpson Strong-Tie says the loft market has held up at 60,000 conversions a year and that “there’s no sign of the bubble bursting”.

“We also see I-Loft having potential in garage loft conversions and particularly with timber frame housing, where there are particular issues with using heavy RSJs,” said Mr Sanders.

Following the launch of the connector system, Simpson Strong-Tie is now developing a ‘suite’ of complementary I-Loft products, including ventilation and hole support plates.