pricing large jobs

[GQuigley67]

got a chance to tender for my largest project to date, 300m2 domestic new build with underfloor heating, plant room with boiler and unvented cylinder, boosted cold water, all plumbing work and gas work. Its specified a U6 meter but trac pipe of 50mm? no spec for the boiler yet.

I've got the drawings and spec, but was wondering if it would be wiser to have a quantity surveyor price it for me ?

Also, could I get a commercial subby guy on my gas registration to do the gas work?

 

[markfxy]

if it s got underfloor heating can't see why you'd need a gas supply of that size i'd query that

 

[ShaunCorbs]

Yea would get and m and e surveyer to draw up/ price the plans and just sub the gas work out / post it on here/ where are you located ?

 

[Chalked]

New build that size if both floors are ufh, will only need 16kw. Add in towel rails and hot water, and your only looking about 28kw. So s u6 is fine.
If your looking at long runs of tracpipe, you will need to work out gas rate from thier data sheets.
As for pricing. It's just like a smaller house, but bigger.,!! :wink5:
I can recommend Duty Point ( Scubatank) pumps for the boosted supply. Just fitted one with integrated tank, quiet solonoid operated water supply and nearly silent induction motor, giving 130lpm @3bar. Worked out about the same cost as a DAB equivalent.

 

[GQuigley67]

Yeah I queried the gas supply as its a 40kw boiler, with gas fire and cooker. Waiting on reply, visiting site tomorrow, main contractors looking for labour pipe etc he will supply expensive parts so will make it easier for me to price then. I would say 35mm to boiler then reducing from there, as meter is outside plant room.

I have the M&E drawings and spec already, just don't want to underprice a job of that scale, I'll have better idea when I see it in person, looking at the specs it's almost like small commercial.

 

[Atouchofgas]

Stick 22mm to the fire cause they'll change there mind at the last min and then blame you for the 15mm, 22 is over kill but at least you've got it covered.

 

[markfxy]

I wouldn't get a qs to price it the money you pay them you could buy easy price pro estimating software you'll have it to use on other jobs afterwards

 

[missplumb]

i agree, i wouldnt pay a qs/estimator to price it, what they charge has to come out of your money and you might not get the job, especially if your price includes £1000 for qs fees. just price as you would any other job, list of materials, how many men to do it, how long at £x/hr. if its going to be chew then allow more time, dont forget to add a contingency, cos theres always something you miss.

 

[GQuigley67]

Got all the specs and drawings etc and going to measure up, got the gas pipe changed on the designs, hope I get it it's a concrete construction and spec is copper so it's more like a commercial installation than a domestic new build. No crappy plastic

 

[ShaunCorbs]

all copper and not copper on show?

 

[oz-plumber]

If it's all concrete, then make a fairly generous allowance for clips, drill bits and core drilling.

As for pricing, just break down each section of the job and work out the labour and materials required for each section.

If it's your first large job, make sure you spend the time now, to make sure you get it as close to being right as you can.

There's no point in getting 2/3's into the job and realising your allowance for labour is shot.

If that's the case, you will also find out you are about 25% less than the other quotes.

I'm telling you from personal experience.