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Am building a small extension with a lean to roof. What space should be between centres on rafters and also ceiling joists centres please ?

Do I need to use vertical damp proof course when using wall starter kit? All the pictures I see suggest that it is not used. What is the building reg on this? thanks kev

I understood that building regs insist on an Inspection chamber at all junctions - am I mistaken on this?

I need to connect new toilet drain to existing exclusive drain ( 110mm pvc) and hence the need for an inspection chamber. The problem is the proximity to the wall wont allow it. An alternative is to connect at a shared 160mm drain a little further away but still on my property. My question is...

Since the lintel is so loose and the wallplate is presently doing all the work, I would remove the lintel and clean out all the old mortar before replacing the lintel directly beneath the wallplate without any mortar between them." pack up" the lintel from the bottom using old slates if possible...

Many thanks everyone your answers were most helpful. With regard to cavity closing using vertical DPC and brick I thought that all cavity closing needed to be done using propriety closings containing an inbuilt amount of insulation and that the building regs demanded it. I have learned a lot...

Thank you. does this also apply to door frames or do they need more substantial securing?

I am building an extention and have been told that my new windows need to be set back into the cavity and secured by straps into the inner leaf of brickwork. This is to prevent cold bridging. What kind of straps do I need and how would they be fitted without being on view?

many thanks is it possible for you to provide a link to the drawings you refer to please kevin

Am building small extension under the permitted development scheme. In order to save on Architect fees, I wonder if I could submit simple but accurate self drawn plans ( without sophisticated software) for the building control dept. Can anyone advise on this and any help on doing so would be...

Hi, am planning to build small groundfloor extension toilet and shower. I have been told that all new builds containing toilets must have wheelchair access. Does this apply to an extension? I cannot see the point in having wider doors and room if the rest of the house doesn't accommodate...

right, good that solves the problem . many thanks

Yes I can see that timber along the top of the frames would be fine but what about the vertical corner lengths? are you suggesting timber here also to take the weight?

Hi, planning to build small porch on front door. It will be 3 sides of window frames ( including door) sitting on a dwarf wall. My question is, does the roof sit on top of the frames or can I reinforce the corners with anything to take the weight, any help or advice appreciated

Hi all, I was considering using Thermalite type 3N Trench blocks 300x450x215 for below ground ( small single storey ext.) but they look quite soft and easily chippable I wondered are the strong enough in damp foundations?? anyone experienced using them? Are they ok because they would save...

Hi, does anyone know how I can thread a cable up the cavity into the loft after being filled with small beads/resin ?? There must be some way but what?? kevin thanks

Thanks John. I thought separate otherwise hand basin waste would come up through shower plug hole. What do you suggest? kevin

Hi all, hope there is a knowledgeable drains person out there and able to advise. Can I connect a foul Gulley to an adjacent Soil pipe? Do building regs. allow this.? Please see sketch. In order to keep shower waste separate from hand basin in my proposed downstairs bathroom I thought of...