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Planning on using 6"/150mm twin wall flue, with an outside diameter of 210mm. Provided I can get the pipe vertical below the timbers there will be over 100mm clearance each side between flue and timber. I understand the minimum is 50mm.

Hello As per my other thread I'm currently opening up an old chimney to install a woodburner. The problem is the old clay flue now comes out underneath the ridge of the roof, so I need about a 500mm step (i.e. centre of the existing chimney to where I want the centre of the flue to go through...

Sorry for my late response. Got called away to other things. Here's the chimney from the attic: I'm assured that the remaining chimney is not supporting the roof so the plan is to clear enough brick to get an angle piece on top and out through the roof. The property is actually 2 semis...

Sorry yes, I meant the ridge of the roof is over the remains of the chimney, so I was planning to crank it out between the rafters. There's no liner in there at the moment, just the original clay flue. Pics to follow after more coffee. Thanks

Hello, Looking for a bit of advice on reoppening a chimney. The chimney is still there but has been capped off at the top and a new pitched roof put over the top of it, and the main joist goes right over the top of where the chimney wants to come out. My plan is to remove the old brick work...

John To condense things a bit: I meant the claim of a bulb having a life of x,000 hours. I assumed for some reason (without giving it much thought) that this would be the expected lifespan of any given bulb rather than the mean lifespan of all bulbs. So that some proportion much greater than...

Turned into quite an interesting thread. I'm glad I'm not the only person who dredges up abstract academic nonsense while blundering through DIY stuff. Economics degree in my case which covered a lot of statistics. I believe I covered mean, mode and median at A level however it's the kind of...

It would for a general population because the vast majority of people have 2 arms and 2 legs, giving a very tight distribution, but if you were to sample say crocodile tamers you might find a much different distribution skewed towards fewer limbs. You might still find that the modal or median...

Interesting that it's turned to statistics which I do know a bit more about than lightbulbs. There's surely a joke about statisticians changing a bulb in there but it's too early in the day. It is a bit dishonest to use a crude mean like that without compensating for the distribution. Neither...

My maths was at 5 hours a day that gives you 5000 days use which is 13.5 years. If they last half this long it's not terrible. Though maybe that's still optimistic? A couple of spares is definitely worth while though.

Detlef Fair point about maintenance. 25,000 hours sounds a lot but if I have to pull the ceiling down every couple of years it's a bit of a pain. I will look into surface mounted ones too. SFK That does look good. Thanks. I'm not wild about the style of that particular one but good to know...

I guess you're not a fan? Interested to hear why as I don't have any particular axe to grind for them, I just like the look, the energy use snd the relative lack of maintenance. I'm not sure it would actually need that much but having 4 spreads the light nicely and with a dimmer it can be...

Hello, I'm currently putting up a new ceiling and would like LED downlights, however under the current plan I would have a very shallow void of about 40mm plus 12.5 plasterboard. I've looked online but it's hard to find anything that will definitely work in this space. There are a couple that...

When I say crumbly it isn't falling off. It's fine undisturbed but goes very flakey when drilled. It's also about an inch thick (really) in places so I'm not that keen on bringing the whole lot down. Since my first post I have actually got somewhere with a longer and better pilot drill and...

Now that I've decided on plasterboard it seems like a better idea all round. Cheaper, can have insulation above it and can have recessed lights. If I can figure out how to fix the wood up there.

Hello, Couldn't see a forum that better suits this question so general seemed like the best bet. I have bought a concrete house - a solid, 1920s block built one, not a post WW2 prefab - which I am trying to smarten up, and having difficulty with the ceilings. The plaster is rubbish and my...