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Posted: Fri Feb 27, 2009 8:52 pm
by Andrea
Hi
Considering block paving for our driveway and paving slabs for our patio.
What base is recommended for each of these?
Mant thanks
Andrea
Posted: Fri Feb 27, 2009 9:01 pm
by msh paving
150mm mot type1 for drive way
100mm mot type1 patio MSH 
Posted: Fri Feb 27, 2009 9:06 pm
by Andrea
Ta,
Erm wot is mot type 1? 
Posted: Fri Feb 27, 2009 9:15 pm
by 87-1235666499
It's the industry term for a type of graded limestone material that compacts very well (you'll need to hire a plate compactor).
If the potential supplier you are talking to does not recognise the term, you've got the wrong company!
You'll be amazed at the size of the pile you get when it's delivered, for an average driveway you will need about 6 cubic metres which it memory serves me will be around 12 tonnes.
Oh and don't try to move it about by shovelling, use a rake.
Best,
WOP
Posted: Fri Feb 27, 2009 9:16 pm
by 87-1235666499
Or, I should have said, get someone else to do it for you!
Posted: Fri Feb 27, 2009 9:26 pm
by Andrea
Ah.
One chap suggested a pre-mix conreate base for the drive as he had worked in the area before and said there's a lot of clay in the ground. He explained it would prevent denting, taking the weight of vehichles.
Would this be a fair assumption?
Posted: Fri Feb 27, 2009 10:23 pm
by Dave_L
Andrea wrote:Ah.
One chap suggested a pre-mix conreate base for the drive as he had worked in the area before and said there's a lot of clay in the ground. He explained it would prevent denting, taking the weight of vehichles.
Would this be a fair assumption?
What a lot of crap!
Posted: Fri Feb 27, 2009 11:23 pm
by seanandruby
its not always necessary for a patio depending on sub grade. mot type 1 is now called DTp type 1.
Posted: Sat Feb 28, 2009 8:07 am
by Dave_L
Andrea - all the information (and more!!) you'll ever need to know about sub base materials and construction.......HERE
Posted: Sat Feb 28, 2009 7:27 pm
by Big Phil
Type 1 can be many aggregate types and even recycled aggregate containing %ages of crushed concrete, asphalt, glass. In the UK, Type 1 refers to the Manual of Contracts for Highway Works (MCHW) or more commonly the Specification for Highway Works (SHW) Cl.803 Type 1 Granular Sub Base.
Strictly speaking it is a material 'specification', not actually a material. Generally a 40mm crusher will comply but it has to be non-plastic and non frost susceptible. It can be Limestone, Gritstone, even recycled aggregate, but generally a limestone will compact easier.
Limestone GSB1 will have a compacted density of around 2.2T/m3
Posted: Sun Mar 01, 2009 7:38 pm
by topgrafter2007
on your driveway you could consider using a geotex type fabric to strenghten and reduce rutting if you want to spend alittle extra prob £70.00. weve used it on drives that have had heavy traffic and one drive had 12 vans on it for 3 months! without any ruts!! just a thought...