Have you asked Knauf? The list that Colin linked to on another thread said they are open for business, as are several distributors.

Posted By: djhHave you asked Knauf? The list that Colin linked to on another thread said they are open for business, as are several distributors.

Thank you, yes I've tried Knauf and all the large distributors, SIG, Encon and the like. Colin's list is helpful. SIG, who have a partial supply operating, have said they can't source the slabs at the moment and offered me the equivalent product in 100mm thick combo roll form. I need to insulate 270mm depth and was wondering if I use 3 x 100mm combo rolls would that work out even though it's technically more volume than the space allows. Also, the roll thermal performance is 0.040 W/mK compared to 0.035 W/mK for the slab. Would that be appreciably different? I need to get the insulation in the floor asap to continue with the rest of the build.

We believe we have contacted you before regarding glass insulation in either bead or board form.

If you only have 270mm depth of void, our previous suggestion of expanded glass beads should be the best option in terms of inflammability and longevity. Yes, the Lambda value is 0.066 but compared with quilt which settles, the 0.066 does not degrade over time and the initial improved Lambda value of the quilt at 0.04 is not great when you compare it with the other end of the spectrum such as aluminium at 250.0.

The beads (4-8mm in diameter) are much improved in terms of insulation over other products such as Leca, Lytag or Veriso and are immediately available in 0.5m3 bags and can be loaded onto flatbed transport or a curtainsider. As loose-fill, they can be easily poured and will follow contours either above or below to fill the void.

Posted By: djhYou'll certainly be able to compress 300 mm of roll into 270 mm space. It may even improve the U-value a bit.

Or worsen it, as the size of the interstices between the fibres will be reduced.

Our limited supply remaining from our low carbon self-build as a result of change in design is 50 x 0.5m3 builder's big bags which can be loaded onto flatbed or curtainsider transport, each weighing 100kgs approx and can be lifted on site by four people or moved on the ground by two for pouring into place.

The amount you require net of the joist volume would seem to be around the total we have remaining, as we have recently sold to several other people, one from Scotland.

The total price will to some extent depend upon transport cost as we are prepared to negotiate to some degree as all insulation materials are bulky but relatively light. The total weight of the consignment will approach 5 tonnes for transport purposes but in terms of bulk will require a larger vehicle.

Depending upon quantity, we have sold to others at between £110 & £75 a bag and because you would clear the 50 bag remainder we have for sale, we would need to recover £60/bag - substantially under the cost price delivered to us on an entire 40ft trailer from the manufacturers.

We hope this answers fully the queries you raise.