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There are lots of different types of concrete mixes.. what I would like is the density/ volume of sharp sand, aggregate and cement so given a specific volume and mix type (c1,c2 etc) I can estimate (accurately) the quantities required. I've searched the net and quantities are always in KG but...

I need to level the oversite. Can somebody tell me what the minimum allowable concrete that can be placed on oversite is? Also how long should it be left before placing EPS/XPS over the top? On top of insulation will go UDF screed and then concrete microtopping. Regards

So I'm intending to put up ewi. Solid brick so wanted to use mineral wool.. however I have a very narrow path 'just' enough to get a wheely bin through. What I wanted to do was place 130mm everywhere apart from in this section as to keep the pathway.. and so in this section I would use aprox...

Just wondering - having seen some reasonably priced beams - what the best method of cutting to speced size would be? Disk cutter, recip or are both too slow and best with oxy acytelyn torch or plasma cutter?

I'm wanting to lower the current floor level in order to give more headroom for loft conversion. Ok seems nuts but it's a shell and the floor has to come up anyway. Currently I have a suspended with void between 1.1m and 0.450. All walls from finished floor will be tanked internally and...

I'm looking at a loft convertion where headheight is more than a luxury to work with. I am therefor looking to use shorter/thinner timber by using flitch beams. but then came a thought. what about service notches/holes and their effect on the beam? It seems strange wrong to reduce a joists...

Wanting to remove a supporting wall. but have a flush cut with the remaining wall. The load bearing wall goes up into loft space to support purlin. Can in theory a single skin internal non load bearing wall support a steel beam if the load is converted from point load to UDL by use of a...

With EWI I read that it is not classed as development but as an improvement and can therefor come under PD subject to the usual and that of material finish. So what about warm roofs? They would increase the ridge height. But again is it not an improvement as opposed to development? Any thoughts?

I've just been looking at the spans for a 50s bungalow. according to the architects drawings the 3x2 rafters at a pitch of 37.5 span 2.55 between 7x1 ridge plate and purlin and 2.4 spans down to wall plate with 400mm centres. Obviously it works as it hasn't moved in 65 years...

Can somebody please tell me what is the difference between a structural technician and structural engineer? When getting calcs done for steel/timbers/footings etc should/is a tech sufficiently qualified to do these and would it be accepted by BC? Thanks

With regards to provisions for cleaning windows on non domestic or where not self clean glazing part k5.4 exists (2013) or N4 (Pre 2013). Is there anything similar that applies to domestic? Regards

Can anybody offer any logic behind why New build U values requirements appear less stringent than those in for new elements in existing? Is it the assumption that doing so will increase the U value of overall property if other thermal elements are upgraded? If so is there/ can there be a...

Hi, From what I gather intermediate floor domestic Live load = 1.5kN/m2 Dead = 0.7-1kN/m2 On 400 centres and using 0.7kN for Dead load... if I am not mistaken my loads/ linear meter of timber are.. D= 0.7 x 0.4 = 0.28 Live=1.5 x 0.4 =0.6 I chose Timber c24 49 x...

How can I protect the bricks from the elements. Over eager and without a clue of how long things were going to take, over the sunny summer months, I decided to take off the horrific pebble dash from the walls of our little bungalow. We are still not able to live there so there is no heating...

Hello, I am currently preparing to lay a new mdpe service pipe (it will be inspected) seeing as I have gone to the trouble of digging the trench I wanted to optimise water flow/ reduce pressure drop by using 32mm pipe. I am having an external stop cock which will be within 1.5m of the...

Hello, I'd be interested to hear peoples thoughts.. pro/cons of 12:240v downlights with LED bulbs. Wiki points to this //www.diynot.com/forums/viewtopic.php?t=87040&start=15 which was last update 5 years ago and LEDs have come on a lot since. Any thoughts?