gravelrash

You still got the glass units....?

simples.. A block wall resides 75mm behind and parallel to the Web Joist, the roof deck sits directly on top of the joists. While 75mm is sufficient for a babbys hand to get in behind the joist my fat hands can not...so not possible to parge, plaster and would probably slice my sausages in to bacon on the steel webs trying to brush paint. So looking for a low cost liquid to create airtight barrier that can be sprayed.

has anyone read my thread -its inaccessible for parge or plaster...its behind the webjoist. the thread started with an alternative lower cost product than purple, blowerproof etc.

I need to make the blocks airtight in a position that I can not plaster, there are no holes... just sealing the blockwork with something.

anymore input

the section is along side of roof web joists 225mm deep (warm Roof above), ceiling boards under joists, rest of wall block walls to be wet plastered.

I have an area of blockwork behind web joists that can only be sealed by spraying for airtightness, has any one got cheap alternatives for liquid membrane. I looked at permaseal which is vapor barrier but is used as a radon and CO barrier and a guy has suggested bitumen paint...has anyone used these?

Im not unhappy with the slab although I just assumed standard practice tolerances were tighter. I was an engineer and found 2 previous building conversions difficult...having to throw tape and level and rely on eye. Now Knackered with heart failure I decided to leave it to a builder and just organise materials for my final resting place.

2'' slush on it today and melt completely filled the unfilled outside of footings trench...they had been left open for drainage later next week (brickie/ builders idea). Shit happens, just always happens to me!. luckily had an old vortex pump in the container to pump it out.

SE and architect never specified tolerance, the concrete guys had a datum to work to and guy floating the finish asked what floor finish I was having which I told him to just cover me for every type and get it as flat and level as possible. A rough check seems to be that the level falls about 8mm across 14.6m of floor with the puddled areas less than 2mm low and one spot has a slight ridge of 3/4mm and about 1m long...but I think this would be under a kitchen cupboard later.

One of the best views in the area... only trouble is the 35miles of open view to Saddleworth and Derbyshire peaks which the wind loves. The shower recess is 2m x 1m

Just had concrete finished floor slab laid yesterday which was power floated...How flat and level is flat and level? rained this morning before I had a look and there is a lot of ponding and high spots.

Planning will not check physically they just want the calcs and design to sign off the decision and conditions, inspection is the Building Inspectors job...if he can be arsed. Have you asked the BI if he needs to see open trench and crates? Just mention over phone if he needs to before you back cover...if he is happy not to inspect then just stick a few in and pipe off to drainage dyke.

Get a Con29M residential coal report from coal authority https://www2.groundstability.com/con29m/ they don't cost that much and have indemnity insurance cover. You need up to date report for planning and you may find the geo problem is not mentioned now...previous reports from coal board for my area have subtly changed over the years and what was a possible concern years ago has probably stabilised.

bump

40m3 is very excessive. I calculated for 150m2 roof 1 in 10 year 6hour storm and with 40% climate increase, I created a wild detention pond, it has a standing pond level with a banking around sides and can accept the storm flow if required. Pond liner sits halfway up banking and maintains level by natural percolation through soil banking, when it floods it will dissipate at its own speed through ground percolation. 'Rainfall Calculations and soil infiltration. Calculations for 1 in 10 year storm with 6 hour change show a required hard surface water (In accordance with the Wallingford Procedure) R=0.35, Z1 360min= 33.4mm x Z2 (1.22) x 1.4 56.7mm/6hr x 150m2 = 8505lts rainfall/6hr' This was accepted and passed by planning and BC. what is your percolation like?

Yes, vcl

Has anyone got a recommended Alutrix alternative. 168m2 flat roof so trying to keep in budget since insulation cost rise.

do you have to foam all the small gaps? ie 2-3mm

Mike, could you pm me his details too. In Leeds and needing a reliable supplier next month.

Just putting foundations EPS sheet down and the boards seem to have quite a large tolerance dimensionally, leaving gaps between boards up to 5/6mm. Is this normal for EPS? I have been gap filling but cant get into smaller gaps, but 3 layers going down with dpm between 2nd and third. Probably been covered before but cant find anything in the search.

whacking will compress the voids... as when they block pave

Builder has spent day putting down blinding layer for insulation before concrete. He has not wackered the blinding (50mm) sand, although some tamping before scraping. Is this normal practice? There seems very little advice in blinding hardcore. How do mcb and other icf foundation companies do it?

I dont think a sketch is necessary... block masonry cavity walls with eps bead insulation. Hoping to sit windows with 80mm in cavity and 15mm within block opening to seal with expanding tape. sill extends 150mm over block and external cladding.

200mm cavity and looking to locate windows 90% over cavity. 1800 x 1325 Alu thermally broken frames with 48mm triple glazing. Anyone know of a cavity closer that supports 120Kg unit?