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There is no wall plate on a flat roof. Don't you have any drawings to build to? There must surely be some details on the Internet if you search. The joists are the roof structure, so they extend to the edges of the roof. Where the joists are parallel to the one wall, fit noggins every 600mm...

A 4x2 will do, and props at about 1m spacing

Normally the joists are what the fascia and any soffit is fixed to and support the roof deck right to the roof edge, so do cross both leafs.

You will need more props. 2, maybe 3 more I don't understand the tripple board thing. You need timber on the floor as well as the ceiling to spread the load

There should be a gap to allow water to drip off the barge board and not soak the render. A recessed timber filler piece may be better than mesh. But mesh could be rolled and wedged up the back of the board and secured with ss nails or screws through the board The verge should have a...

Chimney breasts typically have a structural opening with the bigger lintel, and then the fire opening with the infill brickwork and smaller lintel or flue throat. Look for the lack of bonding. The important thing is how the fireplace opening and flue gather is formed. Bear in mind that some...

It depends on what legislation is being breached. FYI, exemption from enforcement does not make the unauthorised work lawful.

Planning or building regulations enforcement? Extensions are not "signed off" under planning regulations, there is no "4 year rule" under building regulations.

Note to self - always check for the obvious first. :rolleyes:

Its common and related to different materials (lintels, cavity fill) and ever so slight different natural movement. Not a structural issue

No coating on tiles works for anything other than a temporary repair. Tiles, of whatever material don't fail by becoming porous, but fail be becoming friable and the actual material breaking down. No amount of coating prevents that. Roof cleaning and coating in the new driveway cleaning and...

Sorry, but your comments in this thread demonstrate a poor understanding of how floor ventilation works. And you really need to be careful not to create the environment and the problems that you are trying to prevent, by applying the wrong way of thinking It's not a case of insulating it...

The same policy applies if the proposed building is for your granny, your servant, your annoying spotty teen, or your grotesque cousin who must be kept away from villagers and full moons. The building must be ancillary to the main house, occupied by a relative, helper or employee, and not...

They don't. They apply the same rules no matter who the extension is for

See a solicitor. Take action under Statutory Nuisance legislation, and the HA willl have 21 days to permanently fix the problem else will face action in the magistrates court. It's the fastest and easiest way to get a result. You can usually make this claim for free. Also read up on this or...

You are limited by the height of the first floor and the width of the stair flight opening in the first floor. You will need to conform to current regulations for stair dimensions - tread depth, step height, minimum angle and head heights. Those tend to govern the sizes of the flights, and...

Yes it's what happens with age, the felt upstand comes away You could try heating it up and pressing it back, and securing it back into the joint Otherwise, fit a lead, or lead substitute flashing over the upstand

Ideally the roof edge detail should be a projecting edge to protect the cladding, with a fascia and air gap which would have flashing and insect mesh. The images don't show much, we'd need to see the face and the side view to see what the eaves would look like and what's available. There's...

I hate it when inspectors think they know better. Fresh out of uni trying to tell us how to build. :mad: As for homeowners, what do they know. They are paying for our expertise, and then start moaning about things.

Wall starter ties are not designed for the horizontal movement of cavity wall leafs, but for the vertical movement of extensions.