Recent content by Lewism3

I'm relating this to loft conversions and the fire resistance of the new floor and/or wall partitions. In some cases a modified 30 minute standard is used. I think its something to do with the structure being able to resist the standard 30 minute test, but concessions made for various...

Can someone explain the modified 30 minute standard of fire protection? I know it applies to one storey conversions, no more than 2 habitable rooms and/or a total area not exceeding 50m squared. How does it differ from the standard 30 min protection? Martin

Thanks Masona Much appreciated. Martin

Thanks for the info. Do you remove the ceiling joists and replace them with stronger alternatives, or simply add support to the existing ceiling joists? Martin

I'm doing a presentation on loft conversions, yippee!!! I realise the loft floor requires strengthening, but how is that carried out? What are the differences with traditional purlin/rafter roofs and trussed roofs regarding floor strength? Any help is greatly appreciated. Martin

Thanks Woody, that's very helpful. I have just downloaded a copy of Guide 20, looks interesting. Lewis

The research continues but I can't find much about pre 1940s clay tile manufacture. Does anyone know how such tiles were made, i.e. the process undergone to form them, and also why the formation of a clay tile is laminated. Why doesn't it crumble when subject to spalling? Lewis

Sorry Woody, bit vague I know. The sheet I have been given says lamination, but I think it really means delamination or spalling. Roofer, spot on!!!!!!! Thats just what I needed. I really required what changes were made to the process of production to make them more durable. Thank...

Can anyone throw any light on the lamination of pre 1940s clay roofing tiles? Yeah sounds strange, but I have to do a brief presentation on the subject. Finding research very tricky indeed. Any info or links would be appreciated. Thanks Lewis