Often we are asked about the process involved in converting a back door and window into an opening suitable for bifold doors. Previously we have documented this in a single story home, but this time we will show you the steps taken in a double story adaptation.

And we’re off…


The house is protected with sheets and boarding, you cant see but behind this is an open plan kitchen and dining room, the installers used dust sheets to make a barrier between the areas.


When all of the measurements have been checked and they know where the new steel will go the area which needs to be chopped out is marked up. The first step is to grind along the line to avoid excess plaster coming off when work is taking place.


The plaster is then removed to expose the brickwork, lintels and current steels beneath.



The first floor will be held up using acro props during the installation and until the brick work has dried. These acros will need to sit on the decking outside as well as on the inside of the opening, here the decking was made from a soft wood an did not have enough support to take the weight without risk of the wood splitting. To avoid anything untoward the installers braced the decking and added additional support all along the edges.


When the first floor is supported the internal brickwork is removed by the brick layer, he quickly makes light work of removing the brickwork below where the window was.


Next the brick work and lintels are removed to make the opening, ready for the steel to be put into place.



One of the hardest parts of this project was getting the steel into place, this started with the grueling task of getting it round to the back of the house. I must say these 5 guys really did put their backs into it!


The steel was then carefully and painstakingly maneuvered onto the genie lifts to lift the steels into place. Although our images make it look easy there was a lot to maneuver; taking away part of the fencing to get the steel up to the decking, placing boards under the genies and making sure everything is in position.


Our installers worked well into the darkness slowly inching this 400kg steel to the right height.


Once the steel was at the right height, it had to be moved forwards to sit between the brickwork. This job was planned to spread over two days, as such the installers cut out boards and screwed them into the opening to make sure the house was secure over night.


The boarding was taken down and brick work laid under either side of the steel being careful to make sure it was level, we used quick drying cement here, once it was dry the genie lifts were moved and above the steel was completed with breeze blocks.


You can see the new solider course being laid outside, breeze blocks will be laid above and then rendered on  top of. Everything will soon set in time for the doors to be fitted!


Lewis and Tristan fitted the door into the opening taking out and replacing each acro as they moved along hanging the doors. There will be a full version of this installation in more detail put up soon.


You can see the doors fitted here, one acro was left while all of the brick work dried, later on in the week we returned to complete the rendering and remove all of the supports.


This was a great installation to be part of! The installation team worked extremely hard over the two days, there is a lot more that goes into this work than I could imagine!

Thank you for your great work Lewis, Tristan, Dylan, Kev & Dorian!!