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Single Storey Home Extension

March 3rd, 2013 | Posted by admin in Projects

Whilst carrying out a simple single storey home extension we decided to document our progress as we moved through the various stages of the construction project.

We hope that this helps to demonstrate the high quality of workmanship that is synonymous with A.S Building Services.


The home extension begins – pre demolition photograph:

Before we embark on the new home extension the original structure needs to be demolished, the image below shows the structure before the demolition work began.

Single Storey Home Extension

Strip Foundations:

Following on from the demolition of the old building the strip foundations are now prepared.

Strip foundations are one of the simplest and most common form of foundations used and are commonly found in a small home extension of this type. This is because in a single storey home extension such as this, the only walls that will actually bear any loads and therefore require supporting foundations are the exterior walls.

For more information regarding foundations and building regulations please visit: http://www.planningportal.gov.uk

single storey home extension foundations

Foundation and Damp Proof Course:

The initial courses of bricks are now laid on top of the strip foundation to form what is commonly known as the DPC or Damp Proof Course.

The DPC layer consists of several courses of bricks laid using mortar with additional damp proofing compounds topped off with a specialised damp proof membrane. This forms an effective horizontal barrier to prevent moisture rising up through the building by capillary action; this is commonly known as rising damp.

Also note that in this building the structure that will form the internal floor has also been protected using a similar damp/water resistant membrane.

The image also shows the cavity for insulation and external drainage for the WC already in place.

Single storey home extension Damp Proofing Course

Extension outer shell and roofing:

Additional courses are now laid on top of the DPC to form the outer shell of the extension.

Following completion of the outer shell the supporting joists and tiled roof are fitted as soon as possible.

Single storey home extension - outer shell

Joists and studding:

The image below shows a more detailed view of the Joists and internal studding.

The purpose of the joists is to not only allow for fixing of the ceiling surface but to also provide support for the roof by evenly spreading the load between all exterior load bearing walls.

The studding is secured to the joists and will form the structure for the extensions interior, non load bearing wall.

Single storey home extension - interior showing studing

Internal work:

With the exterior of the building now complete, the windows and exterior door are now fitted.

Now that the structure is essentially weatherproofed, the internal work can now begin. This includes the fitting of plasterboards and respective skimming followed by installation of any required fixtures and fittings, which, in this case was simply a WC and sink unit with drainer.

Single storey home extension - interior showing fittings

One single storey home extension ready to go.

Following the completion of the internal work and some addition pointing to ensure that the outer brickwork is aesthetically pleasing the home extension is now complete.

Single storey home extension - completed building

The difference even the smallest home extension can make:

A nice before and after shot that shows how a simple single storey home extension can not only increase living space but also dramatically increase the overall look of the property.

Single storey home extension - before and after

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