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Defo use a geo textile membrane. I had 150mm of compacted type 1 and it sunk where my wheels park. The type 1 had pushed into the clay. The geotextile membrane might have stopped this.

I would guess the stud wall would also need to be 30 minutes fire rated between a garage and bedroom.

How about made a ply enclosure around it then fibreglass the inside and outside. Also fibreglass uptown and around the centre hole. Does the pipe stick our the ground enough to get a seal on it? Then cap the the top with a lid.

I worked in a recent new build in a garden and the pp included that a sprinkler system had to be fitted due to access as a condition.

Looks like that size would span over 12m!

Just found easijoist and they can possibly according to there span tables do a flat roof span of 7m which would be front to back with a 219mm joist. This would mean no steel needed and I guess the joist could be set at an angle for the run off. Not sure on costs of these though.

For the sake of 4% I would rather have the panels alot more discreet and no chance of comeback. Is it a warm or cold roof, I guess if it's a warm roof having bolts through to the inside will make a cold bridge through the vapour barrier? If your not going for payment you might find the solar is...

Was going to say we got beams that big in the local asda multistory car park.

How do you plan to fix them down. Just with ballast or actual fixings through the roof. I'd be worried if just ballast all the way up there. Usually the installer would do wind loadings as part of there design, or are you just installing yourself and not registering for any SEG payments? Have...

I've just got a lawfull development certificate for a 12x7.5m garage outbuilding. I've got to build it below 2.5m, well I got a little more as the ground at the rear will be approx 300mm higher. Now I know i should be getting building regs but I'm just deciding on the layout first. Would anyone...

I think the rules changed last month, they certainly did for our local dorset council. They dont send letters to neighbour's anymore, and they ask you to post the site notice outside the property and send photo evidence once its displayed. They have also requested various photos of the site and...

If you removed the tree and waited you could do the build at a later date. Basically the soil will gain moisture and expands upwards once the tree has stopped water intake. I'm not sure of times but I would of thought 2 winters worth of rain would allow enough time for the ground to change.

Looks like there isn't much overhang on the tiles. Wonder if the water is just working it way off the end of the tiles and tracking back under then onto the walls.

Theres no way that system will produce the figures you think they will. I'd look at some graphs from.working systems to get a better idea on what they produce especially on average days and overcast days.

I guess 12mm celotex will leave just enough for 18mm of wood flooring. What you planning on covering it with though if its a utility room? Wood would feel warmer to walk on unless you tile over it.

What electrical work did you do exactly?

Those tiles will be cold on the feet. I'd go for screed and include wet underfloor heating. A single zone kit which can just be run from the radiator loop would probably cost you less than 250 to DIY install, even if it's not used as the main heating source.

Does the decking not need to be connected to the house for this 300mm rule to apply?

Also what depth would it leave in front to the pavement?