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The joists are running side to side not front to back because of the span, so I'm talking about to slope from front to back and perpendicular to the joists. Wasn't sure if affectively fixing a furring strip every 400mm onto perpendicular joist would be sufficient fixing wise

However, your post has intrigued me, so if I want to slope front to back and perpendicular to the joists, it would be fine fixing wise? Length would be 6m with overhangs, so if I'm right I could get a firring that length and 100mm to zero and cut our between the joists once fixed, so as correct...

Apologies, the joists run side to side because of the shape of the room and span (longer front to back). Question is more about if noggins need to be smaller so as not to block through ventilation. Firrings will raise middle section by 40mm as falling from centre to both sides, so if only...

Building a garden room, cold deck, span is just over 4.2m, used 8x2 joists. Roof will dual slope sideways, from 40mm in the centre to zero both sides,,should I be putting in 1 or 2 rows of noggins and am I right in saying they should be slimmer than the joists to aid airflow, so 6x2 or 7x2 for...

I'm building a garden room but due to certain build requirements, I need to hang the joists and slope the (epdm) roof perpendicular to the front doors (side to side as you look at the building). I was going to slope the roof one way and build a small upstand to the front to hide the slope...

Morning all. Building my garden room and wondering what to put on top of timber joists as a subfloor. Base is floating on 12 piers, plenty of air flow. Doing mainly on my own so things taking a bit of time. For that reason and although I will keep it covered whilst building walls and roof, would...

Yes along those lines, wasn't sure if that was big enough or would need to go 152x152. Wow, better get plenty of weetabix in

Sorry, meant to say would try and use 5x2 or 6x2 across the halved length of 2.75m,, (into the steel each side

I have a garden room that will span 4.5 x 5.5m. Currently going through PP to try and get up to 3m height. If that fails I'll make do with the 2.5m allowed height but would like to run a steel beam across the 4.5m width to halve the 5.5m length and use smaller timbers. I've been told a 6 inch...

Thanks, yes, that's what I was getting at. Also that way the front of the shed wouldn't be quite a way off the ground. Just worried I'd create some kind of pond doing it like that

One last question if like in that drawing I've attached, I dig down the 120 mm difference from high to low point. Will the build height be taken from the highest remaining point or is this frowned upon by inspectors. Plan to build on concrete blocks and then a raft, so would pooling at the base...

OK, so my phone plan would not be allowed. That's that then, I'll apply for PP. Thanks

I'm in the process of trying to build a garden room within PD and I'm going around in circles trying to get sufficient head here right. I've got one last hope othwrwise I'm going for PP. The room will be 5m deep and 4.5m wide. The plan is to use 7x2 along the 4.5m span. First question would...

Trying to get walls as close to 1m from boundary as possible, so roof overhang if at 300mm would be 700mm from boundary but if overhang is irrelevant I'll be fine My understanding is anything under 30 sq m doesn't have to comply with building regs, if 1m from boundary. Garden is 40m long, so...

Apologies, meant to put in the measurements. So I've allowed from ground up 50mm gap underneath floating rafts 125mm floor joists 18mm osb 12mm flooring 13mm plasterboard ceiling 195 roof joist (if going 4.5m span) 100mm firring for fall 18mm osb So 531mm, less the 2.5m and my head height is...

I'm in the process of designing a garden room and would really appreciate some help. I plan to build it with 4 timber rafts bolted together and sitting on concrete blocks. . Garden is long and narrow, so planning 5.5m front to back and 4.5m wide. So max span of each individual raft would be...