When it comes to architectural design, a roof it is not simply engineering it is an art form.
Here are a few of the most commonly used forms within construction and building today;
A roof with the sole purpose to create extra living space. Having two slopes on all the four sides where the lower slope becomes steeper than the upper one. The lower slope is commonly fitted with dormer windows.
The trussed rafter is capable of spans up to 12 m and can be designed to accommodate many different pitch angles. Perhaps the most significant advantage is the factory assembly of the trussed rafter which saves valuable time, speeding up the whole construction process which is important in today’s industry.
A mono pitch roof is one which slopes from one side of a building to another. The mono pitch roof is commonly used to form extensions in domestic construction. Tt typically comprises a series of rafters fixed to wall plates at either end of the roof span which support battens to which the roof covering is fixed.
Closed Couple Roof
This type of roof design most commonly known as ‘Cut & Pitch’ incorporates the addition of ceiling joists running horizontally in-between the rafter feet. Typically the structure becomes much more secure, the joist acting as a tie preventing the outward deflection of the wall and increases the potential roof-span to approximately 5 m.
Purlin roofs constructed on site include many sections of timber, which needed to be assembled to form the final structure. This is a very labour intensive and requires skilled craftsmen in order to install. The benefit of this form of roof using struts to support purlin spans of up to 8 m, the roof space can be utilised for storage and ultimately allow the space to be used for accommodation if needed via a loft conversion.
A flat roof is a roof that is completely, or almost level. However, whilst they are described as flat, almost all flat roofs are actually laid with firring pieces, cuts of timber laid over the joists, creating a fall to ensure that rainwater can run off to the lower formed outlets. Typically they are designed to have a minimum fall between of 1:40 – 1:80 in the finished construction.