Frequently Asked Questions

Pavers may be glued over existing concrete using a special adhesive known as Paver Bond. Avoid gluing pavers in ground level applications such as driveways, walks or patios as the existing concrete may not be of sufficient quality. Also, gluing in these situations nullifies the ability of the paver surface to adjust with movement during the freeze-thaw cycle. Pavers are most successfully glued in applications using retaining wall units such as stairways and elevated patios. Genuine Paver Bond should be used as ordinary construction adhesive will not provide a strong, yet flexible bond.

Concrete adhesive should be used above freezing temperature. Make sure the surface is clean and dry before application.

 
There appears to be no limit on the height of walls that can be built using segmental retaining wall systems provided that the wall is properly designed and constructed with appropriate soil-reinforcement materials. Requirements and construction technique will vary with height and site and soil conditions.
 

In some small garden or planter walls, drain rock will not be needed. Otherwise a drainfield of 3/4" clear, angular aggregate will be needed. The size and location of this drainfield, as well as the location of geotextile fabric, if used, will vary from project to project.

An appropriate base is needed for both retaining wall and paver applications. It provides a sound structural foundation to bear the weight of the project, while resisting moisture and the effects of movement from the freeze-thaw cycles.

Generally, 4" to 6" of base is required for foot traffic (patios, walkways, etc.) and 10" to 12" is needed for driveways and other applications for vehicle use. Exactly how much a particular project will require will depend on use, as well as site and soil conditions. The sand setting bed should be 1" thick.