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I understand you can't cut padstones down, but finding the correct size is a nightmare, I will need the padstone to sit on external and internal brick work 280mm wide, the rsj is 270mm wide..(No cold bridging internal) Any suggestion of of a suitible padstone size emailed and called guy who...

If I'm reading correctly padstone according to plans is 175mm rsj 270mm

My point Tony, and thanks for the reply, the two rsj's bolted together are 270mm, which to be honest is the cavity wall thickness, the rsj is fine. The padstone calculation seems way out..

More detailed

Hi guys, just a little confused my drawing states that 215 width padstones are required, but the two steels bolted together are 270 wide, see attached so confusing. Surely the padstone with would be the same has rsj?

Returning to my previous post, NHBC state 'where there is a exposed wall between the coping and flashing cavity tray should be installed.. If the epdm rubber membrane runs up and below the aluminium coping is there a need for weep holes on external render. (no exposed wall) From top of coping...

Have seen some fantastic aluminum coping online,having posted a similar question before,when I was thinking of using coping stone. Aluminium coping comes with seals and looks all professionally desisgned to make the product water tight. Have been told before with the stone coping,weep holes...

Stuart you mentioned proper cavity trays,there seems to be a huge variety,could you possible send me a link that are suited for 100 mm cavity with block work.Only seem to see the small length ones at Screwfix/Toolstation,can't see how this makes sense.i thought the longer they are the less...

Thanks,so just bed in and bring down a block on external leaf,bringing up at the ends to create a closer,job done,and building BC Should be happy..not forgetting the weep holes

The description states not suitable for unsupported across cavity walls ??

Sorry,just uploaded two images,for better understanding lol..which would be more suited.. Thanks

That's cleared that up then ☺️ There are many types of cavity trays pre formed,Aso ones that are formed DIY, would this be using visqueen or the 600mm dpc you buy on rolls. From my earlier image,what would you recommend ?? I have a load of visqueen left from concrete slab. Thanks in advance

Thanks woody

This is the detail I have seen,just wondering if below the coping stones is correctly closed and sealed are weep holes necessary. Thanks

Hi have seen loads of diagrams on line,but is it essential to have weep holes below coping stones,on a cavity wall to meet building regs. The construction is block work 300mm to be rendered.

Excellent

Cheers mate for your help,that's sorted that then

Yes I understand need to keep in gauge,was just worried with the height of the first cut within lintel only 50mm along the row,can't see anything online regarding building regs,regarding hight of blocks,only that 150mm overhang required for lintels.

Thanks 23vc So just maintain the gauge and have a cut inbetween the lintel?? Shame really would love to just blonk these in without cutting..

Hi All My lintel is in place,just wondering could I use full blocks above lintel or continue the bonds and cut them all to size. Thanks