There’s a lot of people getting their lofts converted right now, so If you are getting a Loft Conversion in London we personally recommend talking to this company, who will provide you with a free quote if you live in the London area.
Before hiring a loft architect
Before you start your Loft conversion here are a few factors to take into account to make sure your loft space is suitable:
Measure Head Height in the Loft:
Take a measurement from all-time low of the ridge wood to the top of the ceiling joist; the useable part of the roof ought to be greater than 2.2 m.
Measure the Pitch Angle in the Loft Space:
The higher the pitch angle, the higher the central head height is most likely to be, and if dormers are used or the roof is redesigned, then the floor area can be increased.
Different types of Roofs
In Roof building two primary structures are used – the standard framed type and truss area type.
The conventional framed type is normally found in pre-1960s residences where the rafters and ceiling joists, together with supporting timbers, are cut to size on site and put together. This type of structure has more structural input, so is often the most appropriate type for conversion – that’s why cities such a London which have a lot of old housing stock with attics are seeing a lot of old houses having loft conversions.
Post 1960s, the most popular form of building made use of factory-made truss roofing system sections. These utilise thinner, and for that reason cheaper woods– however have structural stability by the addition of braced diagonal timbers. They permit a home roofing to be set up and felted in a day, which is a huge benefit to a contractor. Nevertheless, this type of truss requires that there are no loadbearing structures beneath, and so opening the area needs a greater added structural input. This will generally include the insertion of steel beams between loadbearing walls for the brand-new floor joists to hang on and the rafter section to be supported on– together with a steel beam at the ridge. This added structural input needs skill, understanding and equipment that would limit scope as for a DIY enthusiast and a far higher money outlay.
It is a definitely a good idea to seek recommendations from a loft conversion specialist company in this instance.
If your roof has low head height
Raise the Roofing system: This would involve eliminating part or whole of the existing roofing, and reconstructing it to offer the required height and structure. This is structurally possible, but the major troubles are the high expense and getting planning approval. If the entire roofing location requires removing, a covered scaffold structure, to secure your house from the weather condition throughout the works, would also be needed.
Lower the Ceiling in the Room Below: The ceiling height in some spaces in older properties might be 3m or even more, so if the roofing area height is limited there is the choice of reducing the ceilings below, supplying it still enables a minimum of 2.4 m. This will need all the existing ceilings in concern to be gotten rid of, causing much mess. With this approach a plate will certainly need to be bolted to the wall utilizing guard anchors or rawlbolts, for the brand-new floor joists to hang from. There is also a requirement for an appropriate tie between the roofing system structure and the dwarf wall formed, to avoid the roofing spreading. Any DIY involvement will certainly be restricted to supervised demolition and clearing.
The existing ceiling joists are unlikely to be adequate to take a conversion floor, so added brand-new joists will certainly be needed to adhere to the Building Laws. The size and grade would have been defined by the structural engineer, who will certainly have taken into account the period and the separation range for a given installing. The brand-new joists span in between load-bearing walls, and are normally raised a little above the existing ceiling plasterwork using spacers below the joist ends.
Your Building Control inspector will certainly define exactly what you need. The roofing structure can be insulated in one of two primary means. The most straightforward is to use a ‘cold roofing system’ method. This involves filling the space in between the rafters with 70mm-thick piece foam insulation such as Celotex, ensuring that there is 50mm spacing in between the roofing felt and the insulation (for ventilation by means of the roofing and soffit vents). This approach can be undertaken by the DIYer.
The other main method is ‘warm roofing system’. This technique utilizes 100mm Celotex insulation or comparable over the rafters, and a covering capping, followed by the tile battens and tiles. This is not really a practical alternative unless the roofing coverings have actually been stripped off. It might be utilized with a dormer, especially if it has a flat roofing.
The perfect location for a staircase to land is in line with the roofing ridge: this will certainly make finest use of the readily available height above the staircase. The minimum height requirement above the pitch line is 2m, although this might be reduced to 1.9 m in the center, and 1.8 m to the side of a stair. In practice, the actual position will depend upon the layout of the floor below, and where called for the offered height can be attained utilizing a dormer or adding a rooflight above the staircase or, if suitable, transforming a hip roof end to a gable.
Maximum Variety of Steps: The Laws define that the maximum variety of steps in a straight line is 16. This is not usually an issue, as a typical setup normally just needs 13 steps.
Windows & Dormers.
The loft conversion will need a way of getting natural light and ventilation, and the most uncomplicated technique is to use rooflights that follow the pitch line of the roofing system. This type is fitted by removing the tiles and battens in the position that the rooflight will be fitted. The rafters are cut to give way for the rooflight after suitably reinforcing the remaining rafters. The rooflight frame is then fitted within the brand-new opening, and flashings included before making excellent the surrounding tiling. This type of window is the most economic, and more probable to be allowed without preparing consent, under your PD (Permitted Formulation) rights. Preservation rooflights, which are a little more flush to the roofline and are made from metal, can also be specified.
Dormers not just offer natural light however can include space to a loft conversion; they can be at the ends or sides. They are specifically effective where the pitch angle is high, as the helpful floor area can be increased. The mansard type will provide maximum conversion roofing system space due to the fact that it projects the maximum readily available head height, hence providing a higher usable floor area. A hip to gable conversion has a similar result.
Dormers and other comparable conversions are generally installed by opening the roof, and cutting the needed defined lumbers to size on site. They normally include substance angle cuts so could not be a task that a DIYer would usually undertake. Care also has to be taken with the roofing and side coverings, to get a great weatherproof structure.
Some loft conversion business will make the dormers off site in their workshop and lift into location. This process allows quick setup, and quick weatherproofing.
Dormers can have gabled or hip roofs, and with mindful design can enhance a roof line. In practice, a mixture of the readily available types can result in the optimum light and area, and supply a fire exit.
Fire Security in your Loft Conversion
At least one mains-operated smoke alarm system with battery backup must be set up in the flow space of each storey. All alarms are to be adjoined.
How much will my loft conversion cost?
An approximate free quote to the likely costs can be obtained through this website. Expenses for raising roofing systems or lowering ceilings can not realistically be given due to the fact that of all the variables that need to be considered.
Prices usually start from £20,000 and can go up to £40,000 if major structural work is needed.