Loft Conversion Specialist, London


Loft conversion specialist Modern Attics provide a range of loft and roof conversions including dormer extensions, mansard roof extensions and hip to gable conversions. The speed of construction of your loft conversion will depend on the type of property and style of roof extension being built. However, the stages of construction are basically very similar no matter what size the project is. The loft will be constructed using our standard specification.

The following stages illustrate a standard box dormer conversion for a mid-terraced house and should be regarded as only a guide. We will advise you of the anticipated length of your project at our initial survey.

Once all the necessary permissions are obtained and we are ready to start we will introduce you to the loft builder and we will discuss the plan of action for your build period.

The first step is to erect the scaffolding and internal floor finishes to be protected with coverings ready for commencement of work.


An opening is made in the front roof slope for access for both materials and operatives to avoid having to come through the house. Steel beams arrive and are then inserted at low level above the existing ceiling joist to support the front roof and to take the new independent floor.

The new floor is constructed with timber joists between the steel beams. The new floor is then crossed braced (noggins) and insulated to provide fire and sound proofed between floors. The water tanks, if any, are re-located under the eaves.


The dormer extension is framed out over the existing roof slope where possible to ensure weather protection throughout the construction of the dormer. Large tarpaulins are used to protect the property from rain during any periods where the old roof is removed and areas are open.

The first layer of roofing felt is applied to weatherproof the loft area. The dormer and loft area are at a shell stage but you will be able to see the space taking shape. At this stage you can decide on positions of partition walls and introduce/position roof windows or other features as required.


The window openings to the dormer and velux to the front slope are trimmed out of the rafters.

The running of electrical cables and water supply/waste pipes (first fix) are installed.

The partition walls are erected to form the configuration of the loft space to form separate bedroom/study and shower/bathroom as applicable.


The windows will be fitted and the loft shell is insulated prior to plasterboarding.

The tile cladding to the exterior of the rear elevation will be finished with roofing felt, battens and vertically hung slates or tiles.

Guttering and fascias are fitted.


The stairs are fitted.

The flat roof surface is completed with three layers of roofing felt.

Walls and ceilings are lined with plasterboard.

Internal doors are fitted

The plasterers will arrive to skim the whole loft.


All the joinery will be fitted (architraves, skirtings etc ). The made-to-measure staircase will be finished by fitting the spindles and handrail which closely match the existing to create the impression that your new loft conversion is part of the original house.

The electricians and plumbers will return to fit all the electrical fittings (lights, power sockets, smoke detectors, extractor fan ) and the bathroom suite and radiators.

Your loft will be completed and ready for final finishing with decoration, tiling, carpeting etc.

Loft conversion specialist Modern Attics provide high quality roof conversions at competitive prices in all areas of London including Tottenham, Haringey, Archway, Whetstone, Grange Park, Winchmore Hill, Bowes Park, North London, as well as South, East and West and Central London.