Converting a Loft by Adding a Flat Roof Dormer

London property before a loft conversion

Choosing the right type of loft conversion

Loft conversions are an inexpensive way of adding an extra room to your house. If you live in London or Hertfordshire, a loft conversion will increase the value of your home by 20% on average. Before you start converting your loft, find out what type of loft conversion is best for your property.

Our client in North West London wanted to add an extra bedroom with en-suite to their home. Because there already was an existing house extension at the back of the property, they decided to convert their loft space.

The original roof was quite low, so a simple roof light conversion was not an option. To create maximum space, the client decided to add a large flat roof dormer to the top of their house.

Building trusses to support a flat roof dormer

Starting the building process

To start with the construction, we first erected scaffolding with covering at the top to keep the house dry and safe during the construction.

The original roof tiles were carefully removed and put aside to reuse later. Our experienced carpenters replaced the old trusses and built the timber and steel frame, which forms the base of the flat roof dormer. We then constructed a flat roof with a waterproof layer to prevent damp.

We also reinforced the first-floor ceiling and built the loft floor, leaving space for the staircase to be fitted later.

Insulation and window fitting

Next, our team of expert loft conversion builders fitted the frame with EcoTherm insulation and a breathable membrane before installing the gutter and fascia. Then, they carefully placed the original tiles back onto the remaining sloped roof.

Our glazers fitted a row of quality double glazed Schuco windows, which bring natural light into the new double bedroom while matching the rest of the property exterior.

Our plumber and electrician prepared the first fix plumbing and electrics, making the conversion ready for the next building stage.

London house with a dormer loft conversion

Completing the construction

We finished the exterior of the conversion by dressing it with external plywood, concrete board and white silicone render.

One advantage of a dormer over a roof light conversion is that you can choose where the stairs will go. We have fitted an internal staircase along one side of the dormer so it would have minimal effect on the layout of the en-suite bedroom.

After fitting the stairs, we plastered the interior walls.

Fitting the interiors

Our joiner and carpenter built and installed a timber partition and a custom made-to-measure wardrobe so that our client could get the most of their new space. We painted the timber wall and the wardrobe doors brown.

We tiled the bathroom and fitted the washbasin, toilet, bathtub and mirror cabinet. Our electrician installed underfloor heating, wall-mounted airconditioning, ceiling spotlights and bespoke wall lights, which can all be operated by a smart home system.

To complete the interiors, we painted the walls and laid the carpet.

About Author

Michaela Mrockova
Creating quality content for local construction businesses, including building companies and interior designers

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Building a loft conversion in London