Recent content by daz3770

Hi all, I have recently had some building work done; dorma and rear extention. Since the work has been completed and paid for, a large crack vertical crack has appeared in one of the internal laod bearing walls. There is a new steel beam sat on the wall taking the weight of the roof of the...

That really isn't the important bit. But the ridge height can not be raised and to get the required height in the dormer it needs to run front to back. Sealing and upstands at the ridge to prevent water ingress. So the question still is. Will a 3 ply torch on system provide all the water...

Hi gents, I am having a flat roof built on a new dormer. There is not enough ridge height available to have a more tradtional gutter at the front edge so having to slope the roof back to ridge and have a secret gutter arrangement. The area of the roof is 35m2 with a fall of 1:80, with...

Thanks for the help gents. I will head out for the supplies.

I think i read some where that moisture can penitrate Celotex. Is that misleading info?

Hi there all, I am bricking/blocking up an old doorway in an external wall, as part of renovation works. The building is about 80 years old and the cavity is max 45mm. My question is, what is the best form of cavity insulation to use, while making sure that moisture is not transmitted...

Now that you put it like that, it would seem silly not too. Many thanks

If using 4mm and assume that R1+R2 = 9.8, then 9.8 x 45m / 1000 = 0.44ohms. This seems high as Ze at CU is 0.35 ohms. So, using 6mm and R1 + R2 of 6.53, = 6.53 x45m / 1000 = 0.29 ohms. This IMO sounds better. Am I worrying to much about the earthing resistance? If looking at it purely...

A little research using good auld Google reveals that 1 cubic metre of gravel 1/4 - 2 inch is 1.682 tonnes (dry) and 2.002 tonnes (wet).

Hi there, I think you mean water pipe, metal drain pipe; then no. The power is just for portable power tools and lighting. There will be work bench and shelves, mainly constructed in wood. May have some metal shelving. Is that any help?

Thanks for your replies. In the artical you refer to, it mentions using 10mm bonding. If I use 4mm 3 core SWA, will the resistance of 1 of the cores, over 45m back to house, be low enough to provide an acceptable earthing arrangement? Hope this isn't going a little OTT.

Posted: Sun Jun 21, 2009 10:02 pm Post Subject: -------------------------------------------------------------------------------- A tonne bag is (nominally) 1m cube, so one of these should do the trick. 1 cubic metre of water (1000l) weighs 1 tonne. Gravel sinks, so you will...

hi there gents, I want to run power to a new shed which will be 45 metres from main house/CU. Can I use 3 core armourd cable and use one core for the earth? Or at that distance from the CU do I need to make it a TT system? All suggestions welcomed, with in reason!!! Kind regards

What is the 25% rule? I'm a novice!!!!

Thank you for your prompt replies.