mazzlebizzle

Hi, So I've decided to water-seal the piers on which the wood will be closest using bostik water seal. The stud (3x2) and 75mm PIR Recticel will be around 50mm off the concrete block wall (about 5mm off piers). The whole outside of the building will be treated with bostik water-seal also then clad with wood slats. Were going to get ourselves an electric dehumidifier also. We decided against MDF in the end and went with 12mm structural Hardwood Plywood. Thats for the ceiling and walls because I hate plaster.

Hi Folks, Im wondering if this will become an issue. We need to insulate single skin concrete blocks (100mm thick 7.3N concrete blocks). We are going to flush the walls with the piers on all four sides with 3x2 stud attached to floor and ceiling. This will leave a gap of roughly 50m between the studwork and the concrete block. We were then going to compress 200mm rockwool into the stud work and compact it against the concrete blocks and fix mdf board to stud to stop rockwool falling into cavity etc but this will eliminate a lot of cavity space. Im then going to seal the blocks outside with something like bostik water seal. Is this going to be an issue or breed mould internally? Am I better using PIR between studs to keep it away from the wall completely? or maybe putting a breathable membrane on the internal wall and use rockwool? Ive used everbuild blackjack DPM to cover the concrete base internally, and covered up to 4 blocks high. Externally Ive painted 4 blocks up also. My plan is to have an electric dehumidifier in the winters. Thoughts?

So I ended up only going 4 blocks up in the end. And will be a 20-25mm gap behind all stud walls ??

Hi, I have a single skin wall made from heavy concrete blocks that are 100mm wide. There are four piers in the middle of each wall. When we stud the wall out it will be flush with the piers so creating a block room. The stud frame will be fixed to the floor and roof so there will be roughly a 25mm gap behind the walls. I am going to DPM the concrete pad internally and a few blocks up internally with DPM blackjack and have done so also outside a few blocks up. My question is can I DPM the whole internal blockwork? the outside will be painted with textured masonry paint and serve as a water barrier but will it do any harm if i DPM the whole inside blockwork? you can see ive started but dont want to carry on unless advised its ok.

I work for Openreach and that is DEFINITELY happening. Couple of ethernets in ducting to install an access point in there. Obviously not acquired from work

Thank you all for your suggestions. So to confirm we are going to take a whole block off the top at the front so all four sides are the same height. Then a wooden wall plate placed on top. The 150mm rafters will have a 25mm birdmouth cut into them. The flat roof will be made of rafters and hangers, osb, PIR insulation, osb and then EPDM on top. I believe theres a vapour barrier in there too. After the floor has been built up there'll be a clearance of round 2.2m. By the time its all installed it'll be at around the 2.7m mark HOWEVER I will be ordering a few ton of top soil and build the ground up to the pad as my garden does have high/low points and so at least one side of the building will be 2.5 high or maybe shorter and the other 2.7 max. The ground level will be level with bottom fence one side and slow down to 2.7 the other. That'll be ok now right? Square footage shouldnt matter as long as the dimensions are within permissable guidelines and all materials are non-combustable? The walls will be studded and insulated then plaster board and plaster. Electric will be fed up there using a buried armoured cable etc Anything else I'm missing?

Hi Folks, My first post here. I have so far put down an elevated concrete pad (30cm high) and have also built the walls out of solid dense 7.3N concrete blocks.Aas it stands the height of the highest block is 2.73m high including the concrete pad height (front of build). The problem is once the single-pitched roof is on the building height will be roughly 3.10m high. I have since been doing some digging and it seems the building may be too high? I have attached an image below so you can see the plan. I know people who have buildings just as high and some higher! that actually touch the boundaries of their neighbours and have been passed by the local council (Norwich, UK). So I'm confused as to what is ACTUALLY permissible and what's not, given the information online and the contradictory reality. Can somebody help? Also is there anything else I need to think about given the size of the building. Thanks