new workshop roof

[devonwoody]

My double garage has an asbestos corrugated roof and I would like to replace.

What do you think would be a ball park figure of material costs only.

5.5metre square, would need new joists, boarding and cover. (The span is continuous no centre support)?

 

[9fingers]

Pitched or flat roof. Pitched will be better but cost more.

I'm guessing it will be too big a job for you to do? So best call for some proper quotes as the labour could be significant.

Bob

 

[devonwoody]

It would have to be a flat roof, I dont want to go down the planning permission road.

If I know the material costs approximately I can tell if I am getting value for money.
A professional builder said is set up could do the job in a week, (three of them).

 

[mtr1]

Spoke to my mate, who is a flat roofer. He said the labour charge to rip out the old and replace, and dispose would be approx £1500+materials

 

[devonwoody]

Thanks Mtr.

I was thinking somewhere along those lines.

Got as far as this google

http://www.delston.co.uk/joists.htm

So working on 10 pieces of 75x220 of 5.5mtrs. lengths joists?

10x OSB sheets ?

22mtrs of 25 x 100 wall plates.

noggins.

Facia boards plastic £70.

roofing surface surface

 

[OldWood]

I'm sure Mr Google will help you.

I haven't bookmarked the sites, but I found the recommendations for joist sizes somewhere, and the price of timber in the UK is easily located. Joists (either 6x2 or 7x2) will be around £2.50 /m. From experience of both I favour Onduline over felt - so much easier to lay and cost difference minimal. I laid it over OSB.

Rob

 

[9fingers]

DW,

If this is your workshop, you might want to be thinking about insulation too?
Or more importantly the needs for roof ventilation when insulation is involved.


Bob

 

[jpt]

Just had some quotes in for redoing my workshop which is a single garage measuring 7 meter x 3 meter. They came in from £750 to £1800 to strip of old roof and boards leaving the joists and replacing with 3/4 OSB or Ply and 3 layers of felt or whatever it is these days.

john

 

[Mike.C]

I do not know about these days, but asbestos removal used to be very expensive and had to be done by a licenced company.

Cheers

Mike

 

[Paul Chapman]

Don't know what sort of roof covering you are thinking of, DW, but I wouldn't go for felt - you'll be forever replacing it. I'd go for glass fibre. It's seamless and lasts a very long time. I had four done with the stuff several years ago and I'm very pleased with the result. Didn't cost a lot more than felt.

Cheers :wink:

Paul

 

[9fingers]

Anyone charging exorbitant rate for removing asbestos cement sheets
is exploiting fear of the unknown and should not be used. Find a sensible contractor.

These can easily be removed best when dampened and taken to a local tip unless you are trade in which case different disposal rules apply to all their waste.

Blue asbestos fibre insulation is the dangerous stuff.

Bob

 

[Mike.C]

Anyone charging exorbitant rate for removing asbestos cement sheets
is exploiting fear of the unknown and should not be used. Find a sensible contractor.

These can easily be removed best when dampened and taken to a local tip unless you are trade in which case different disposal rules apply to all their waste.

Blue asbestos fibre insulation is the dangerous stuff.

Bob

Hi Bob, so the householder can do the work and dispose of the asbestos himself, without the need of a company?

Cheers

Mike

 

[OLD]

I built a flat roof on my shop and used.
http://www.insulateonline.com/index1.htm?flatintro.htm~main
The insulation is very firm and does not compress even with two men on top.
I used the 75mm as you had to buy a pack off the other sizes then its three layers of felt no stone required i am very pleased with it.
https://www.ukworkshop.co.uk/forums/viewtopic.php?t=23279&highlight=

 

[9fingers]

Anyone charging exorbitant rate for removing asbestos cement sheets
is exploiting fear of the unknown and should not be used. Find a sensible contractor.

These can easily be removed best when dampened and taken to a local tip unless you are trade in which case different disposal rules apply to all their waste.

Blue asbestos fibre insulation is the dangerous stuff.

Bob

Hi Bob, so the householder can do the work and dispose of the asbestos himself, without the need of a company?

Correct. The local tip might have limits on how much you can take up there at a time and not all of them will let trailers in.
Look on your councils website for local details. If you are near a boundary, sometimes the next county/ borough will have better rules.

Bob

Cheers

Mike

 

[matt]

Anyone charging exorbitant rate for removing asbestos cement sheets
is exploiting fear of the unknown and should not be used. Find a sensible contractor.

These can easily be removed best when dampened and taken to a local tip unless you are trade in which case different disposal rules apply to all their waste.

Blue asbestos fibre insulation is the dangerous stuff.

Bob

Hi Bob, so the householder can do the work and dispose of the asbestos himself, without the need of a company?

Cheers

Mike

Yep. I did mine. Double wrapped it in something guage plastic, completely sealed with tape, left it the top of the drive and Corporation of London collected it for free.

 

[Mike.C]

Anyone charging exorbitant rate for removing asbestos cement sheets
is exploiting fear of the unknown and should not be used. Find a sensible contractor.

These can easily be removed best when dampened and taken to a local tip unless you are trade in which case different disposal rules apply to all their waste.

Blue asbestos fibre insulation is the dangerous stuff.

Bob

Hi Bob, so the householder can do the work and dispose of the asbestos himself, without the need of a company?

Correct. The local tip might have limits on how much you can take up there at a time and not all of them will let trailers in.
Look on your councils website for local details. If you are near a boundary, sometimes the next county/ borough will have better rules.

Bob

Cheers

Mike

Many thanks Bob. It just shows that your above statement about some companies exploiting people is spot on. Although I have never had any work done, when we were looking at houses up here, there was one place who's workshop roof was covered in asbestos, and so before we placed an offer we got a quote for removing it, and the bloke told us that only licenced companies can do the work, and he quoted us £2,500 just to remove and dispose of it, and that was on top of the cost of a new roof. He claimed that the local council would take most of that money to take the asbestos off his hands :^o :^o Needless to say we did not employ him (we didn't buy the house), but since then I have always believed that the householder could not do the work.

Just one more excellent bit of advice from the forum. =D>

Cheers

Mike

 

[9fingers]

Sadly as more and more legislation comes into being and the media simply report 'sound bites' from it rather than give a full and practical interpretation of it, unscrupulous tradesmen exploit it.

In the case of asbestos, yes it has rules about disposal. The tradesman can say 'it needs special handling' which is true and the householder recalls hearing something about asbestos and is conned into think 'special treatment' justifies 'expensive treatment'.

As always, it pays to do your homework, investigate any urban mythology prior to getting anyone in.

Bob

 

[OPJ]

As far as a roof covering goes, Mike Garnham used to speak very highly of Onduline. Your local builder's merchant should be able to offer this or something similar (I think Coroline is another name?).

Felt won't last more than a few years before you've either got to patch it or replace it. :? Not worth skimping here, when you'll already be forking out for the rest of the construction (insulations, joists, etc.).

 

[Digit]

I use EPDM rubber for roofing. It's tough, flexible, simple to install, seamless, has a life of something like 40 yrs and DIY.

Roy.

 

[ondablade]

Just FYI my experience with a loft conversion for a friend is that some of those hard faced high performance (but quite thin) foam insulation boards with a vapour barrier done by Kingspan work very well indeed....