sub base

  1. Powerelec

    Sub Base for drive , how deap and which aggregates ?

    I'm looking at a parking space & drive , according to paving expert site , its recomending 2 layers of 75mm each compacted seperately, for heavy duty traffic , mostly light vehicles but occasional heavy vehicle to thats why I am doing it at 150mm, but what sub base aggrigate would be most...
  2. P

    Can I use self levelling on half a room at a time?

    Hello All I have a 7x6 garage floor (concreate) that i'm looking to smooth out with self levelling compound (Mapei Ultraplan 3240 Renovation Screed). Because i'm working by myself due to the size of the room i'm a little worried about getting it all done in one go, plus i've never used self...
  3. P

    MOT Type 1 problems

    Morning. I’ve attached some photos of a sub base I’m in the process of laying for a patio. I am unsure of whether the MOT is up to scratch. What I’m finding is after compaction the surface has areas with quite an open texture (quite crunchy and loose under foot). I think it could be caused by...
  4. S

    Concrete Slab for summer house advise

    Hello, I am due to have a summer house build (7.4m x 4m log cabin) and started preparing the base. The hole has been dug, so next step is compressing with a whacker and then filling with sub base, then whack again. Sub base will be 10cm thick, then a layer of sharp sand 5cm, then 1000g damp...
  5. M

    Block paved driveway questions - old sub base and kerb edging

    Hi all, I've recently taken up my block paved driveway in order to extend and repair it. We've added 30m2(ish) across 2 areas to give hardstanding access to a double gate down the side and to curve towards a front porch extension. And during building works a few years ago the builder stuck a...
  6. M

    Block paved driveway questions - old sub base and kerb edging

    Hi all, I've recently taken up my block paved driveway in order to extend and repair it. We've added 30m2(ish) across 2 areas to give hardstanding access to a double gate down the side and to curve towards a front porch extension. And during building works a few years ago the builder stuck a...
  7. J

    Broken up concrete path - about to make patio area.....

    Hi All, I have broken up a concrete path, with lots of large pieces still intact - roughly a foot square. I have approximately 12 square metres of 4 inch thick rubble to get rid of. At the same time i am going to make a patio area at the end of the garden - about 3metres by 4 metres. You can...
  8. S

    MoT on top of sand??

    Need help... Might be fine, but need to check first. I'm doing my own patio, and for reasons pertaining to how the last one was laid I need to ask... Is there an issue laying the MOT type 1 on top of a small layer of sand? Basically the layers will be, from top to bottom.. Patio Slab - 32mm...
  9. D

    Soaked spongey MOT Type 1 what to do

    Hi, I made an error and laid a large area of MOT Type 1 for a sub base for my garden room in the pouring rain, areas of it compacted ok but most of it is soaked through and spongey. I’m trying to work out whether to just leave it to dry out or whether I will need to dig it up. If I do dig it...
  10. B

    Mot sub base depth required

    We’re building a new driveway. Need to excavate about half a meter of topsoil just to get to ground level, then sufficient depth for sub base and gravel etc. We are coastal and below the topsoil is pure sand. Driveway will be approx 6x30m so huge volumes involved. My question is how deep the mot...
  11. M

    Grano Dust Compaction Rate

    Hi. Looking to see if anyone can help with this. I know MOT 1 has a compaction loss of about 30% but was hoping to find out the compaction loss to grano dust. Had heard it was virtually 0 but couldn’t find anything on Internet or here. Thank you.
  12. B

    Laid and compacted type 1 in the rain and its still soft...?

    I'm replacing my patio and over the last few weeks ripped out the old one, levelled and then started to bring in the type 1. Unfortunately the night before I brought in the type 1 it chucked it down with rain so the ground was pretty wet (puddles, mud etc), brought just over half the type 1 in...
  13. M

    Building up Raised Patio Sub base

    At the moment I have a raised decking above the garden run up to a set of bifold doors. I want to remove the deck and replace with a patio. There’s about 300- 400mm needed to build up to finished level before I can lay the stone. What’s the best material to build up the sub base with? Would it...
  14. D

    Board Over old tile adhesive

    Hi everyone. I have removed our old bathroom tiled floor down to the plywood sub floor. I am left with lots of patchy adhesive on the ply. I am going to lay new laminate. I need to make up a level difference of 10mm so was going to re board over with ply. Removing the old adhesive is slow going...
  15. W

    Plastic Shed bases- Sub-base required?

    Hi all, apologies if this has already been answered elsewhere... I'm awaiting delivery of a 7x4 timber shed which will be used for storing gardening tools, lawnmower, and a small table and chairs. I'm looking at installing a plastic shed base (specifically probase) and on the website it says it...
  16. N

    Fines in mot type 1 sub base

    Hi. I'm in the process of using some mot type 1 as a sub base under a new patio. I've put 60mm down as first layer which I'll compact and then add to to make 100mm compacted. I've spread it out but before I compact first layer, I've noticed a couple of areas (each about 1 foot square) which...
  17. C

    To compact or not to compact?

    In levelling my garden, I have shifted one load of soil from the main area, to the back - which, having previously been a slope, is now encased by four walls. The reason for encasing it in the four walls, was to allow us to level the main area, and dump any leftover soil there to bring it up...
  18. M

    Block paving on concrete base

    Hi all I have an old tarmac driveway that I want block paved. Its about 100sqm. One company that came out today quoted £9000 including all edging and drainage. 10 out of 10 on trust a trader from about 100 reviews. So he has said he always lays his paving on a concrete base of about 3...
  19. R

    Artificial Grass sub base for Dog

    Hi guys first time using the forum so please bare with me. I’m looking at laying an artificial lawn, I’m a pretty competent landscaper and wouldn’t normally hesitate in fitting one but my question is what sub base is best for drainage? We have a husky dog and we’re worried that if we use MOT...
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