Gable Roof Rear Extension

This is known as a mansard roof extension.

Gable roof rear extension.

How to get planning for a mansard roof extension. To make a loft extension workable in this instance it will be necessary to remove the existing roof build up the existing party walls and build a new structure set back from the front wall with the front and rear walls sloping inwards. Add a box dormer to create more full height space. Use 8 penny nails to attach the first 2 in 4 in 5 1 cm 10 2 cm board to the wall studs.

Please have a look at the other construction videos on our channel. A pitched roof falling away from the rear of the property may simply not be possible for an extension measuring 4 5m depth. The minimum recommended pitched roof is 15 degrees. There are several important things to know about matching existing roofs and how to do it depending on what style of roof you have the roof truss design and how you want to add on.

Building an extension to the rear of the house which does not increase the original floor area of the house by more than 40 square metres and is not higher than the house. National planning guidance concentrates on general loft extensions and conversions. The extension should not reduce the open space at the back of the house to less than 25 square metres which must be reserved exclusively for the use of the occupants of your house. Adding on to a house or structure is a great way to get more room without building an entire new house.

From your photos i would approximate the distance between the head of the existing doors and the first floor windows is 1 2 1 5m. Then load bearing roof beams fixed to the trusses are extended in the same way. For the arrangement of the gable end overhang for the standard roof you lengthen the ridge beam beyond the facade for previously verified length using cut rafters. It can be especially useful in providing the headroom needed to add stairs into a loft 1 9m minimum at centre or for a loft bathroom.

The pitch of the extension s roof complements the original building creating a sense of harmony between the two elements. While the extension features a modern steel structure and a large amount of glazing the roof features stone slates to provide a sympathetic nod to the original cottage. Framing the gable ends 1 nail 2 boards onto your walls as top plates. The shape of the new edifice designed by jlarchitecture looks attractive at the back of the house and gives the owners extra ceiling height without overwhelming the external space.

After that you should fix the cornice board to the end sides of the ridge and the load bearing beams.