Piling is typically required where new construction will encroach on Minister Sewer Easements.This is particularly relevant in the popular construction of house behind house battleaxe developments where the utilisation of land area is critical.A leading Western Australian Building Company asked Screwpile Australia to help them overcome the typical re-occurring piling problems and significant cost blow-outs.And for a number of years Screwpile Australia has worked closely with The Water Corporation in developing the Sewer Screwpile System for domestic construction.Sewer Screwpiles are now the preferred piling method. Sewer Screwpiles are cost effective for piling depths of 2 metres and greater in domestic construction situations. For example, a 4.5 metre deep pile can cost as little as Aust $215.00 in ground and takes just minutes to install. Domestic sewer screwpiles are available off the shelf and in most cases installation can be arranged with only 24 hours notice. 

Screwpiles deliver significant cost savings of up to 50% over conventional piling methods.

Land developers are now seeking to ultise land which in the past presented problems due to poor soil conditions.  One such development  was located on a 30 year old rubbish tip and market gardens, most of the original housing has been bulldozed and new luxury villas were proposed. The local authority required a specialised piling system be used on any future construction. The developer had to clearly demonstrate to the Council that any new structures would not be subjected to massive differential settlement as was the case for the original buildings.

' We needed a piling system that was economical and performance predictable. Instant Foundations provided me with that. I have used the system on Stages 1, 2, 3 &4 and we are very satisfied with the results. Stage 3 consisted of 350 x 4.5 meter deep piles. Installation was completed in 1 week significantly reducing my construction time ', says Mr Lou Di Virgilio, Designer and Project Manager for the development.

Screwpile Australia's solution to such projects simply involves the installation of Screwpiles to predetermined depths and centres along the distressed area of the structure. Once the desired depth has been reached and the distressed foundation footing exposed, reinforcement and concrete can be placed. Three (3) alternative methods are available to suit special requirements and access for equipment. Dry pack mortar is recommended between the existing footing and headstock to ensure contact. Any remaining void should be backfilled with stabilised sand. The Screwpile Australia's system is particularly appropriate in regions where land subsidence has occurred or poorly compacted cut and fill sites have been built on.

In a typical example, a house in which a water main had ruptured and caused one wall to slump badly was returned to its original condition in just two and a half days. An excavator was used to install the Screwpiles with minimum disturbance to adjacent areas. The Screw-in foundation system has particular advantages in loose and sandy soils where conventional methods could lead to the collapse of excavations. Eliminating the potential for further structure settlement whilst remedial work is in progress, the use of Screw-in foundations ensures the immediate support of the distressed structure.