Loft conversion guide



From start to finish

  • When you contact us, an initial visit to your property is arranged.
  • During this visit, we listen to your requirements, advise on the best solutions, discuss alternatives, work out approximate sizes of the rooms that would fit and the placement of stairs. We also give a rough estimate of costs.
  • We then prepare a full, written estimate for you based on the choices you have made.
  • Once you have accepted the estimate, we arrange for an architect to visit your premises in order to prepare full plans and drawings for your approval.
  • Once you are happy, these drawings are sent to the Local Authority for approval.
  • Once approval is received, a date is arranged for the commencement of work.
  • Shortly before the start date, we introduce you to our approved scaffolders who then erect a working and storage platform.

Week 1 and 3




  • At the beginning of the first week, the bulk of materials needed to build your loft conversion are deliver
  • A small hole is cut into the roof to which will enable us to gain access. We will use this until the stairwell for the new stairs is created. This enables us to keep you and your household relatively undisturbed until we are ready for the new stairs.
  • The loft is cleared of all insulation and swept clean and the local building inspector will arrive on site for a commencement meeting this is to check everything’s being done in accordance with build regulation and structural engineer’s calculations. We would also discuss materials being used.
  • Our plumber then moves any pipe work in the way of new joists or structural beams
  • Our electrician moves any wiring in the way of new joists or structural beams
  • The structural beams to be put in place these can either be RSJ or Timbers bolted together depending on the structural engineers drawing
  • The first floor joists are then installed these are packed up to allow for any deflection
  • We carry on forming the first floor structure fixings noggin in-between joists.
  • We then staple chicken wire to the joist ready to take the insulation which acts as a fire barrier and sound proofing
  • The ash walls (small walls normally around 1m) are formed and struts and purlins removed
  • The Local Authority building control officer will inspect the work at this stage to ensure that everything is being done in accordance with the approved plans and calculations.
  • Usually at the beginning of the second week, the new flooring is fixed down.
  • The stair case is then measured and put into production

Week 3 and 5




  • Alterations are now made to the roof itself — for example, Veluxes are installed, dormers and gables are built.
  • The base plates for new walls are fixed
  • The dormer walls and new ceiling joists are fixed and the dormer is formed. The walls and roof have ply which is nailed to them
  • The walls and roof are then weathered in to make water tight
  • Any new internal walls are now built, whilst our approved roof tilers finish outside weather protection.
  • The electricians and plumbers will now visit if necessary to fit wires and pipes for radiators, switches, sockets and so on.
  • It’s normally week 4 or 5 we would cut through where new stairs are going, the local authority building inspector is contacted to visit and inspect the works for approval. Once approved then we move on to the next stage.
  • We carry out any alterations necessary to the new flooring and your original floor downstairs
  • Our plumber and electrician then finish first fixing

Week 6 and 7

  • Veluxes are fitted
  • The new staircase is fitted
  • The insulation is cut and fitted to approved standards and the building inspector will return to check the sizes and positions of the insulation and other ongoing works
  • The walls and ceiling have plasterboard screwed to them
  • All the new rooms and stairwell are now plastered
  • The new windows are cleaned
  • The scaffolding is dropped

Week 7 to 10

  • After allowing sufficient drying time, final fittings are carried out.
  • The plumber will attach radiators, sanitary ware
  • The electrician will fit switches, light fittings and smoke detectors.
  • The carpenters will fit doors, latches, architraves. Skirting, handrails and spindles
  • Any final snags are carried out the new loft and existing staircase is hoovered and glass cleaned
  • The local authority building control officer will make his final inspection and on receipt of our electrician’s certificate your loft will be signed off.
  • Congratulations you no longer have a loft but a new wonderful additional space to your home!!!

This was is only a brief guide and covers most of the processes involved but hopefully answers any questions you may have had. By choosing French and Thorley to carry out the work you are guaranteed:

  • Our office will never be closed to you
  • You will always will be dealing with Grant or Rob the owner of the company
  • We will never pass the buck!!