Pocster

Ok so your sole plate is above damp course for external leaf ? just checking as I have issues

I know but finding stock of the 140mm is tricky

Rare. Like collectible rare!. MAY have found some; but miles away!

Hey! Can I ask; what is your timber frame sole plate sat on? - can't be straight on the slab can it???

found some I think finally

Lol not much choice !

Ummmm ; well - depends on your point of view . not much I can do about it but " adapt "

The reinforced concrete wall and up to beam level is insulated 150mm on the outside .

Exactly ! i only as far as I can tell have 1 issue due to 40mm extra needed

I'm thinking timber frame along steel; makes more sense. Steel stronger than concrete beam..... yeah I'll do that. Wish me luck!

LOL!. Well the spec is so old (for example the original timber frame was 100mm); no timber frame company will supply 100mm; min is 140mm Architect has "gone" (not because of me or my build!). So as the timber frame is *different* to original spec; I am making it up as I go along! But lots of details weren't specified at all - like in another thread to make the 'nib' or the balcony (for that I simply got a steel and thats it!). Worry about the balcony later! You see the fun I'm having now yes?

This type of thing? http://www.insulationexpress.co.uk/Product.asp?gclid=CJiDgIb-q9MCFZKdGwodOzwLag Screwed to battons and rendered?. If my side walls are thermalite and the rear (and maybe front also) when they get spray rendered (K rend or similar) will it all the look the same???

LOL! Yeah; I haven't f*ck'd it up that much yet! I *suppose* I could batten the entire rear - across masonry and timber frame; then put insulation in-between ; this allowing whatever type of "render board" to be fixed to the battons. This the standard method? My confusion escalates because I'm going from external insulation below to ermmmm; internal/external insulation above! I see on the forums lots say NOT to insulate in the timber frame voids! - but every example I've seen does exactly that. It doesn't help that my side walls are cavity walls (don't ask me why!). The front? well!. I don't understand if I do blockwork to DPC does any 'render board' just sit on that?. BCO might be called again I think - but he always seems *unsure* - and goes with what I suggest which is even more worrying!!!

LOL!; ignore the wrong way up steel! ; thats for an 'unspecified' balcony.. Look at the photo again and you'll see the steel we are on about - with the unfinished thermalise on it (next to top layer of scaffold boards)

Right! On first photo. My question is does the timber frame sit on the red engineering bricks (which are on the steel) or on the concrete beam? (perhaps it doesn't matter!). In the 2nd photo to the left under the incorrecty placed balcony steel you can see the start of the external insulation. If I place the timber frame on the steel beam it will be almost flush to the back and so the insulation can continue over the entire rear face. My question then (assuming this is correct!) how do I fit 'boards' on top the insulation but into blockwork (below ground section) and also into the timber frame (above ground section)? So possibly (!!!!) if timber frame sits tight to rear on steel my question might just be how do you clad this (ready for render) through insulation and fix to timber and masonry ? (Mmmmmm, that is a simpler question!)

No beam ends on reinforced concrete wall ; steel * next* to them . It confuses me how to clad render the entire rear anyway . Photo and detailed confusion to follow !!

Ok ! i understand most of this but have 1 point of confusion . At the rear we have a 7m steel for the opening below ground . Next to this beam and block floor . As I have to build this small wall for the timber frame sole plate to sit on does the wall travel across the concrete beam or the steel ? i assume the steel ! . Then insulated outside ; then clad ( with something !!! ) ; then rendered . this correct ? Timber frame sits above steel rather than concrete beam ? cheers

Oh ! Right ! perfect !!!!! Thank you !!!

Ok thanks

Ok. I simply can't find anything at 140 x 140 with good thermal efficiency . Width must be 140mm.. Almost tempted to just cut basic thermalise's in half! (length ways) This suggests I'm looking for the wrong thing! This is about the best https://www.travisperkins.co.uk/H%2BH-Celcon-Hi-7-Aerated-Concrete-Block-7-3N-140mm-Pack-of-70/p/509601 But the height is 215!. I guess my house could grow a bit; BCO wouldn't notice (rather than make timber frame shorter..............)

Hmmm, yes been googling! I *assumed* I'd have to build my sole plate support structure (block work) not from thermalite . Though I do see https://www.travisperkins.co.uk/H%2BH-Celcon-Brick-Standard-Coursing-Unit-65mm-Pack-of-600/p/753178?googleApiClient=gme-travisperkinstrading&googleApiVersion=3.19&googleTagManagerTrackingId=GTM-KGT66B&siteName=Travis+Perkins as mentioned in another thread. I could certainly squeeze some insulation over the sole plate (i.e. between external wall and timber structure). Sorry; yes MVHR is irrelevant you are quite right!

Would MVHR not solve this issue?

I see! (worried look on face). The answer is ..... I have no idea!. Architect hasn't spec'd anything for that; nor has timber frame company said anything. Is the sole plate though equally OSB/ply clad with breathable membrane? or is it just the 'structure'? Erm, so how should I solve the sole plate condensation issue???

Hey! The timber frame sole plate will sit on DPC on a 140mm wide (140mm deep) brick 'wall' that I have to build. The majority of timber frame designs have the insulation in the timber frame void - which is fine for me even if different to the architect's spec. What I am tempted to do here is have the timber frame (just at the front as in the photo's) tight to that concrete block run (effectively the external wall); then the timber frame would sit on the block work which in turn is on the steel i.e. supported! so insulation internal. If BCO complains; then I could insulate externally. Why though does external insulation (and say then clad) require no cavity?. This is my real concern....

I'm guessing the 'cavity' only applies when the insulation is outside the timber frame? i.e. thermalite external wall tied to timber frame (where insulation is inside the timber frame voids) does not require an external cavity?