Pocster Posted January 23, 2018 Share Posted January 23, 2018 Right! : Architect's been out and yes there are issues! Started a separate thread as it's a different question The 'front' slab of my property conceals an underground portion of the house. So the 'plan' is (bottom to top) High compressive insulation i.e. expensive EDPM ; this has to be used as waterproofing and also I have 4 walk on sky lights; so has to waterproof around the up stands (haven't bought them yet!! $$$$$$) Cavity drain (Anco) type thing in front of build and at front of plot to deal with surface water Rebar + concrete pour on everything else The 'front' of the build i.e. the entrance current sits at 38cm from the existing slab (50mm for insulation ; 75mm for screed planned) The front of the slab i.e. where it meets the road is only 18cm So I need to create a gentle slope (Architect had babies telling me the entrance to the property needs to be level or no more than a 20mm step ) My question is where do I make this 'slope'. I *assume* (dangerous word) ; I do as planned and for the final finish (tile, blocks whatever) I make the slope then going from 380mm-50mm-75mm 255 (front of property) to the edge of plot 180mm-50mm-75mm = 55 At this point in time I have no idea what the final finish will be! Any advice welcome! Link to comment Share on other sites More sharing options...
MikeSharp01 Posted January 23, 2018 Share Posted January 23, 2018 58 minutes ago, pocster said: 20mm step 15mm for part M I think and IIRC you need a flat portion in front of the door - check! 1 hour ago, pocster said: My question is where do I make this 'slope'. I *assume* (dangerous word) ; I do as planned and for the final finish (tile, blocks whatever) I make the slope then going from 380mm-50mm-75mm 255 (front of property) to the edge of plot 180mm-50mm-75mm = 55 That sounds OK but a drawing would help. If I understand correctly you have a 200mm drop over what distance? Link to comment Share on other sites More sharing options...
Pocster Posted January 23, 2018 Author Share Posted January 23, 2018 Distance is approx 4m will measure properly tomorrow . what do I do about the 4 walk on glass up stands ? Do I mount them at different heights to follow the fall ? I.e tilted ?? Link to comment Share on other sites More sharing options...
MikeSharp01 Posted January 23, 2018 Share Posted January 23, 2018 Over that distance you can have a series of very small falls, 50mm, and flat sections with the inset glass sections, but they will be set at the different levels if they are part of the path. Link to comment Share on other sites More sharing options...
Pocster Posted January 24, 2018 Author Share Posted January 24, 2018 My wonderful architect has just supplied a drawing which he forgot to give me ! Needless to say that causes issues He wants 120mm insulation ; this of course isn’t possible with a 75mm screed . if I use 50mm can I insulate internally ( on the ceiling ) to claw back the u value ? . Would insulated plasterboard help ??? Link to comment Share on other sites More sharing options...
Pocster Posted January 24, 2018 Author Share Posted January 24, 2018 11 hours ago, MikeSharp01 said: Over that distance you can have a series of very small falls, 50mm, and flat sections with the inset glass sections, but they will be set at the different levels if they are part of the path. Ok . wont that look bad I.e 50 mm steps ?? I was wondering if I could install higher than I need up stands then once I know my final floor finish cut them in situ to suit .... Link to comment Share on other sites More sharing options...
Pocster Posted January 24, 2018 Author Share Posted January 24, 2018 Thinking about it ..... make my upstands too high as I said so cut to suit . Create my slope with sand and dry cement . Get my slope then sprinkle with water to form my semi solid base before final finish ( architect has paving blocks ; but they will be too thick - what else can I do apart from patio type tiles ?? ) cheers Link to comment Share on other sites More sharing options...
MikeSharp01 Posted January 24, 2018 Share Posted January 24, 2018 I thought the falls would be slopes between the flat sections of rooflight or do the roof lights stick up? Link to comment Share on other sites More sharing options...
Pocster Posted January 24, 2018 Author Share Posted January 24, 2018 (edited) 1 hour ago, MikeSharp01 said: I thought the falls would be slopes between the flat sections of rooflight or do the roof lights stick up? Sorry if I confused you. My current concrete slab is level with 4 sky light holes in it. My build is 38cm above this and at the plot entrance 18cm so I need to generate a slope for that. So I *assume* (that word again) ; once the up stands are in and I've made my slope (sand + dry cement a good plan?) ; plus I know what my final floor finish will be I cut the in situ up stands to match the fall..... ??????????????? I measured the length of slope and at it's longest point it's 6m. Edited January 24, 2018 by pocster Link to comment Share on other sites More sharing options...
Pocster Posted January 24, 2018 Author Share Posted January 24, 2018 I’ve also found out the upstands are only around 150mm . So I assume I have to put concrete blocks around the sky light openings to gain height . EDPM up them . Add the upstand later - so glass is flush with finished floor and add an EDPM layer around the upstand overlapping the concrete blocks EDPM ??? Link to comment Share on other sites More sharing options...
PeterW Posted January 24, 2018 Share Posted January 24, 2018 Wetting dry sand and cement won’t work to set it - it will need more moisture than you can provide that way and it will move everywhere. What is the purpose of this area..?? Walk on..? Drive on..? This dictates the build up not what the architect thinks may work ..! You need a min of 100mm for BRegs for insulation on this so the over and under may work but those concrete curbs will be a massive cold bridge. What has the architect provided so far ..?? Link to comment Share on other sites More sharing options...
Pocster Posted January 24, 2018 Author Share Posted January 24, 2018 28 minutes ago, PeterW said: Wetting dry sand and cement won’t work to set it - it will need more moisture than you can provide that way and it will move everywhere. What is the purpose of this area..?? Walk on..? Drive on..? This dictates the build up not what the architect thinks may work ..! You need a min of 100mm for BRegs for insulation on this so the over and under may work but those concrete curbs will be a massive cold bridge. What has the architect provided so far ..?? He hasn't provided a lot! The 'roof' can be driven on. As I said can't get 100mm (let alone architects required 120mm); so will have to do some internally on ceiling. No kerbs - the area is 'bound' on 3 sides so was just going to shutter the 1 open side. ( 1 side build, 1 side wall , 1 side kerbs for entrance but not above build) cheers Link to comment Share on other sites More sharing options...
Pocster Posted January 24, 2018 Author Share Posted January 24, 2018 Guess I should treat the fall and finish like any driveway I.e chipping ; vibrator plate , sand , driveways blocks . Link to comment Share on other sites More sharing options...
Pocster Posted January 28, 2018 Author Share Posted January 28, 2018 Here's the architects 'spec'. Not sure why we have the expensive Marmox thermoblock there?. There's no load bearing - so why not just continue the insulation across and up?? (cladding at base for example) Link to comment Share on other sites More sharing options...
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