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Well theory is of then a bit off! Stripped the flat roof today and thought this weighed a bit more than 5kg per sq m. SO got the bathroom scales out, weighed my self, then weighed me + as much as I could hold. Did this for all of the roof and it came out at 40Kg per sq m. :shock...

Was just looking back, and spotted my old post so thought I would update. Below is picture taken about 1 month ago. The whole job is now completed and signed off by BCO. VERY pleased with it.

£7- £10K

I wish it was 15kg.

Also googled this! http://www.onlineconversion.com/ looks like about 5kg per sq meter.

Been google'ing and found this http://www.engineeringtoolbox.com/roofing-materials-weight-d_1498.html

Hi Does anyone have any rough weights per sq meter of what the typical flat roofing materials might weigh? wooden T&g boarded deck and 3or4 layers of ash felt roofing? Thanks

Thanks very much Tom, so sound advice. You make good sense ref the 904/904, as I was only considering what was burning inside, not the effects of old deposits on the outside. I will look at the 7" and if it will either pass down through the steel section, or if I am going to have to break...

That is conclusion I am coming to! Hence why now asking around. As I said I am doing some work up there, and it was more piece of mind. I have some scaffolding up for another job, so they said they will add on the chimney for £320+vat. Stand alone it would be about £1000, which compares to...

It is not a law that you have to answer my question!

316 is the cheapest, so they maximise their profit. They are not going to fit 904/904 for the same price as 313/316 I am asking if there are benfits for going for the 316/904

NO! I got the quotes and then thought about doing it myself.

313/313 or 316/904? Also questioned about the fitting into top of the stove! See my first post!

Oh other thing I forgot to say was I have to HETAS engineers down to price the job, they both came in at about £1500, (so quite good they are both the same) They both listed on their quote 316/316 6" pipe!

I don't know where you guys are all getting these expensive prices from, as every where I look they are all about the same price and 10+ years!!! 150mm (6”) is the minium required for soild fule stove burning as is also recommended by my stove manufactures. As for the liner been “cheap” it...

Think this is the best section? Anyway, looking to get the chimney lined with a 6" stainless liner. We dont really use the fire that much, but as I have scaffolding up there for re-pointing the chimney it makes sense to get it done. I see there a different grades of stainless 316/316...

Thanks for confirming that. I did look at the dry fix system, but did not like the look of the finished results. Which is maybe a bit daft in a way as I have gone with GRP valley and GRP soaker, which both fitted really well and look great + price was a fraction of lead. TBH it is not...

Hi When mortaring in 1/2 round clay ridge and hip tiles to old English clay pantiles, do you completey fill in the void under the hip/ridge tiles or just bed along the edge? The void is quite big and some said bed in a row of bricks frist?

Thanks Nigel I have been in email with a GRP/Glass compnay that have done this type of roof and they mentioned what you have said about the ducting. I am planning to have it all as GRP/glass and no lead.

Dont worry I can handle him! Thanks very much woody for a sensible answer.