The Foundations are in and the footings built, The oversite you see here is made up from 150mm hardcore with a 40mm sand blinding followed by the 1200 gauge Damp Proof Membrane then the 100mm cellotex insulation seen here.  The joints are taped and inspected by the Council then a 150mm concrete cap poured over the top.

Once the oversite is concreted the extension can then take form.  There is a 100mm cavity with 100mm thermolight blocks with cellotex 50mm cavity insulation held in on the wall ties with buttons. Then the 100mm outside brick course.  As you see we are building on the back of the premises and we are leaving the existing kitchen extension in situ and we will build over the top of the whole house to form the loft conversion with out exposing the existing house to the weather.

Here we are bolting on to one wall of the existing kitchen extension using firfix wall ties. The hole has been excavated for the drainage to be installed.

The new French doors are being positioned and held into place so as to be built in.  The central supporting wall is also being built and firfixed to the existing house.

Cellotex cavity insulation held on with the wall ties and buttons.

The upvc windows are built in and the brickwork goes on up to the joist level. The joists are placed at 400mm centres and supported on the middle wall, and the joists that are to go over the existing kitchen are notched into the existing flat roof again so as not to break into the house until the last minute, keeping the customer happy.

Joists supported on the central wall and a concrete lintel over the door opening.

Joists at 400 centres.

The gable with ladder to the new roof being built in, and scaffold up to enable a cropped roof to be built above the bedroom's French doors. 

The steelwork is now in place by building the two gable walls one up from the extension and one built up from the main house's internal wall by cutting back and supporting the existing roofs rafters.  Here we have already put the floor down so as to give us a working platform.  The perlin wall has now been built and the first of the rafters are now going in place. They are to be bolted in two places, 1 where they meet the floor joists, 1 where the meet the ceiling brace.

A tower is used here to enable work to be carried out on the ridge and rafters.  Here you see the new gable built up from the existing main house and the doorway in what will be the new loft conversion.

The new roof is now insulated, felt and battoned and tiled in, and is now fully water tight.  The new loft conversion is now built over the existing house and sheeted in every night to keep dry.  Once the entire roof has been built and tiled to be water tight, the inside work can commence.  The existing roof is now removed and the breakthroughs into the main house are started.