Civil Engineering & Building
Frequently Asked Questions
Can GrassProtecta be used for heavy good vehicles?
Yes, very occasional HGV parking up to 8t per static axle load on firm to stiff ground.
How often can I drive on a grass surface with GrassProtecta?
Up to 4 days per week.
Can GrassProtecta be used if the ground is soft & wet?
No, the ground must be firm and well drained.
Can GrassProtecta be used on a slope?
Yes, up to 1:20 (5%)
Can I drive on GrassProtecta immediately after it’s installed?
Yes but we recommend restricting trafficking until after the grass has thoroughly established through the mesh and the grass has been cut several times.
How does temperature affect GrassProtecta?
Grassprotecta expands in hot weather and contracts in cold weather. Leave a gap of 1cm between rolls when installing in cold (<10 deg centigrade) weather conditions.
How long will GrassProtecta last?
At least 10 years.
How soon can I start using GrassProtecta once its installed?
6 –8 weeks during the growing season but may be longer at other times of the year.
What makes TERRAM Bodpave/Truckpave better than alternatives?
Market leading TERRAM porous paving products have been subjected to rigorous laboratory tests to determine their suitability for use and have been installed on numerous projects throughout the UK for decades with a proven track record. TERRAM provides site specific design advice based upon decades of experience to ensure a successful installation. TERRAM offers impartial design advice and will only suggest the use of porous plastic paving for appropriate projects.
What Porous Paving Grids should I use?
Generally Bodpave 40 units are ideal for car parking bays and overspill car parks, Bodpave 85 units for car/coach parking and occasional HGV overrun, Truckpave for Lorry, coach and car parks. Please see the TERRAM product selector for more details.
Can I use Bodpave for a turning circle?
No. We suggest that a bound material or concrete block paving is used for surfaces subject to regular turning manoeuvres and/or channelized traffic.
Can the paviours be used on a slope?
Yes, the maximum advised gradient for traffic applications is 12% (1:8) 7º.
Do I need a subbase for Porous Paving Grids?
Yes, a Bodpave or Truckpave surface requires a strong stable base to transfer vehicle loads and limit settlement. It may not be necessary to construct a new subbase if the existing ground is sufficiently strong enough for example when surfacing an unpaved hardstanding.
How thick does the subbase of the Porous Paving Grids need to be?
Thickness depends upon the underlying ground strength, type of vehicles and frequency of use. A minimum thickness of 100mm with a stiff biaxial geogrid for residential domestic paths and driveways but may need to be thicker than 400mm for industrial hardstanding for heavy goods vehicles.
What aggregate do I need for the subbase of Porous Paving Grids?
DoT Type 1 (well graded granular aggregate) with adequate drainage or a modified permeable Type 3 sub-base (coarse or open graded aggregate).
What type of stone (gravel) do I need to fill the paviours?
A 4-15mm clean, angular aggregate (BS EN 13242) made from a hard preferably igneous rock such as granite or basalt. Rounded and semi-rounded gravels such as pea shingle are not suitable.