Block Paving installation guidelines

Installing a Block paved Driveway and suitable Subbase is key to a long lasting paved area. Below you will find the guidelines that should be followed for the majority of residential Block paving installations.

If you have any queries with the below please do not hesitate to call and we will be willing to assist you.

Base and Preparation
Remove surface material from designated area including all shrubs, trees and plantation.
Excavate designated area to required depth as base plan.
Cover Excavated area with Geotextile 5000 membrane
Lay sub-base material to Highways Agency’s “Specification for Highways” inbound sub-base material Type I.(Inferior quality material my be liable for failure under loading and be susceptible to frost or moisture movement). Sub-base compacted to medium compaction (either plate or roller method). Compaction to occur at every 100mm base thickness.  Falls and levels obtained min. 1-60 where possible. Min. longtitude fall of 1 in 80; crossfall 1 in 40.
Strengthening Barrier (optional if required – selected) Blind area with grit sand. Lay min. 75mm thickness graded aggregate concrete strengthening barrier (semi dry mix)
Drainage Gullies or channels at lower points where water would otherwise “pond”. Gullies or channels set 5 mm below  surface levels – “bedded and haunched” on lean concrete. All manholes, inspection chamber covers and gulley tops to be replaced. Install Slotted Linear Drainage System if required.
Edging/ Restraints All outer boundaries where necessary to have matching curb stones layed bedded on concrete, “haunched” with sand and cement mortar mix.
Lay front edge protection kerb or block.
Bed base/ footings for any steps if required.
Lay second layer Geotextile 1000 membrane to all area.
Lay Grit Sand Zone 2 BS 7533 approx. 35-50 mm deep and compact. Lay bedding material, level surface area by screeding, to pole levels.

Surface material and laying

Cover site area and place blocks as to plan and pattern agreed with design surveyor. Ensure correct spacing joints, at progress stages compact and vibrate blocks into place. Compaction with plate vibrator conforming to the requirements of Annex F B.S.7533
On completing covering area with blocks fill all surface joints with correct kiln dried fine jointing sand B.S. 7533.
Brush sand into all joints  allowing jointing sand to fall into position. 
Final compaction of all site area.
Give all joints second filling and “top up” with jointing sand.
Stabilise all joints by using Keybond Sand Stabiliser.
Remove all debris from the site and clean all area.

Please note once the paved area is complete annual maintenance is essential to keep the area performing at its best. You can fond more information on maintaining a block paved driveway here.




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