Oversites create an airtight seal between a building's groundwork infrastructure and what will eventually become the finished flow. This provides a smooth layer of solid, poured concrete or suspended beam and block that forms the floor's final foundation.


Oversites are essential to the stability of a building's structure.

While foundations provide the necessary footing to root a building to the ground, oversites are fundamental to a structure's stability. By creating a flush, solid concrete finish that sits between the foundations and the floor's surface, oversites provide essential strength and protect the integrity of a building, while also creating a fully airtight seal that eradicates moisture penetration.

Although commonly used in the construction of commercial buildings, the oversites process is also applicable to residential developments: it helps to level the ground with a solid foundation (once the footings have been established) and prepares each new home for flooring.

Oversites are made watertight and secure using a combination of compacted hardcore and sand, topped off with damp-proofing measures, before applying the concrete pour.

At Mackoy, not only do our groundwork operatives have the skill and knowledge to execute the oversites process with the precision and attention to detail it demands, we also undertake all the previous processes of foundation setting out, trench excavations and sewer works. We provide all the necessary plant and machinery to complete work to the highest specifications and according to the site plans. We always ensure clients sign off our foundation work before advancing to the oversites stage.


Other Services

Beam and Block Floors well stacked Beams for Mackoy Groundworks

Beam and Block Floors

This method is an increasingly popular alternative to traditional suspended flooring as it can be constructed quickly and inexpensive using ready-made materials. It requires no drying out time and so provides a stable flooring that can be instantly insulated and walked on.

CCTV Surveys and Drain Cleaning taken out for Mackoy Groundworks

CCTV Surveys & Drain Cleaning

Our CCTV surveys will help to quickly determine the health of a site's drains, identifying the root cause of any problems in a timely, cost-effective and non-invasive manner. Our drain-cleaning capabilities ensure we can quickly dislodge any pipe blockages or build-ups, preventing foul water drainage.

Retaining Structures on Mackoy Groundworks site

Retaining Structures

Whether a client needs a basement or is developing a sloping site, the retaining walls created by our groundworkers help to contain soil in its place. This maintains the integrity of a structure and ensures that no amount of pressure or environmental impact compromises its stability.

Sewers and Drainage storage space at Mackoy Groundworks Site

Sewers and Drainage

No new home would be complete without plumbing and waste water disposal. As part of our groundwork infrastructure, we create the trenches for these essential services, connecting homes to mainland sewers and ensuring there are provisions for fresh running water.

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