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  1. J

    Garden office foundations

    This sounds like a great solution. More insulation (as no joists) less height needed and less work. So wanted to check DPM on slab underneath insulation will still allow the concrete to dry out ok as it's still drying (only 4 weeks old) considering there's DPM underneath the slab as well...
  2. J

    Garden office foundations

    thank for the useful advice. just to confirm re overhang, it's not essential for the extra space. I could extend the slab or put adjustable feet under the ends? Wish we'd just insulated the slab instead or used timber frame on posts! re floor joists: I've seen stud wall floor plates...
  3. J

    Garden office foundations

    I'm building a 4.8m x 2.8m (ideally) garden room and need some advice on the base / subfloor and possibility of overhang on the floor joists. As you can see in the image, I've got a concrete slab (not insulated) that I was going to sit the 3x2 treated joists directly on with DPC underneath each...
  4. J

    Ply for cladding or battens?

    I'm thinking about materials to clad my garden room in and was going for ply panels or battens which I want to stain/paint black. Ideally with ply I'd like to see some wood grain through it, but am confused about the different types of ply. Marine ply is too expensive and possibly overkill, WBP...
  5. J

    Garden office build specs.

    Much appreciated. I didn't post in the 'your projects' as it didn't say anything about advice but will consider that if I need anymore info. So would an air gap in the stud wall between the insulation and the membrane be enough, with the ply flush against the membrane or does the gap need to...
  6. J

    Garden office build specs.

    Hi - I've looked and have found a lot of the information but not specifically about the points I've made, i.e. dpm above concrete before subfloor timbers. Also the specifics about the use of ply externally as strengthening directly onto membrane with gap behind. Everything else just shows stud...
  7. J

    Garden office build specs.

    Hi there, Firstly I'm new to this forum, so apologies if I've not posted in the correct place etc. Any advice on the following would be much appreciated: I'm building a garden office 4.8w x 2.4d x 2.5h. The concrete base is already done (about 80mm on top of hardcore, mot and dpm, no sand...
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