Guidance Booklet by Outside Rooms

More catalogs by Outside Rooms | Guidance Booklet | 9 pages | 2017-07-16


Page 5 of Guidance Booklet

how-to-lay whether you are planning to do the work yourself or employ a professional to do it for you this guide covers all the essential points you need to know about check out our website for your local ag approved layer | 50mm 100mm 155mm 25mm 1:3 cement + sand mortar bed  haunching 100mm remove all topsoil then dig down until you reach a layer of hard ground subgrade that is firm enough to provide a good foundation dig out any soft spots and fill with compacted crushed stone - see below getting the depth right allow for the depth of your chosen paving block.  200mm plus a minimum of 40mm for bed of compacted grit laying course plus if laying paving blocks an additional  3-5mm of compacted sand for bedding in nb. this is not required if laying flagstones  - see step 5 concrete paving laying course material sub-layer subgrade plus the required depth of crushed stone or hardcore sub-layer  for patios and walkways, use a minimum of 100mm of crushed stone. for driveways, at least 150mm should be used. aggregates for base layers can be sourced from local quarries example installing paving on a driveway 60mm 40mm 5mm 100mm paver  compacted 3-6mm clean washed grit  additional  crushed stone  205mm total depth  don’t forget allow for a fall in the finished surface. a gentle slope or fall allows water to run off naturally instead of forming puddles 2 drainage how to stay on the right side of the law planning permission is only required for new or upgraded front driveways or parking areas bigger than 5m2 when the rainwater runs onto the road or into the drainage system.  to avoid the need to apply for planning permission, the driveway can be constructed 8 25mm 1 preparation so that the rainwater soaks into the ground rainwater can be channelled off the surface of the drive into a soak-away which then allows it to disperse naturally into the ground within the boundaries of your property.  don’t forget if you are planning to use a soak-away remember to allow for a gentle fall on the driveway so that rainwater naturally runs off the drive and into the soak-away system 3 restraining edges 4 sub layer of crushed stone when laying any sort of pavers, it’s important to work within solidly constructed restraining edges. an edge course should be built using kerbs or blocks and should be laid on a concrete bed lay crushed stone then compact with a vibrating plate vibrator to create a firm base layer. add more crushed stone and compact again until the required depth has been achieved across the entire area this will act as a rigid frame, preventing the pavers and their foundations from moving so if you don’t already have your edges in place, these need to be built before moving on to the next step  see above top left diagram 5 bed of compacted grit laying course use 3-6mm clean washed grit. spread the grit evenly and deep enough to allow for compaction, then lightly compact using a vibrating plate.  remember the final compacted layer of grit should be at least 40mm - and, if you are laying paving blocks, don’t forget to allow an additional 3-5mm for bedding in!  do not over compact 1 or 2 passes only at this stage, otherwise the paving blocks will not be able to bed-in when laid 9