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DORAN BROS CONSTRUCTION
It is no brainer that Loft is the most convenient and simplest place to convert to have more space. It is certainly very cost-efficient and hassle-free alternative to moving your house altogether. As per the findings of the Royal Institution of Chartered Surveyors (RICS), the cost of the average loft conversion compares to one-third of the cost of moving to a property with an additional room, and the addition of a loft room can boost the value of your home by up to 25%. In this blog, we will discuss the essential tips to plan the insulation of loft conversion in South London.

Your Building Control inspector will stipulate exactly what you are looking for. The roof structure can be insulated in one of two main ways:

Cold Roof Loft Insulation
The most popular method for loft insulation is to use a ‘cold roof’ method. This method involves filling the space between the rafters with 70mm-thick slab foam insulation like Celotex. This filling ensures that there is 50mm spacing between the roofing felt and the insulation (for ventilation via the roof and soffit vents).
               Also, 30mm slab insulation is attached to the inside of the rafters, providing a total of 100mm of insulation. The rafter thickness is usually less than 120mm, so a batten may be needed along each rafter to provide the 50mm spacing and the 70mm insulation. The roof section needs 300mm of mineral wool insulation or 150mm of Celotex insulation.

Warm Roof Loft Insulation
The other principal method is known as ‘warm roof’. This arrangement uses 100mm Celotex insulation or similar over the rafters. This is not a practical option unless the roof coverings of your loft have been completely stripped off. It could be used with a dormer, particularly if it has a flat roof.
                 Continuity of insulation between the walls and roof of a loft is required to avoid any cold bridging. 100mm Celotex between the stud work can be used to insulate the dormer walls. The internal partition walls use a 100mm quilt that will offer perfect sound insulation. Plasterboard is properly attached to one side of the wall then the quilt is inserted. This whole setting is followed by fixing plasterboard on the other side.

Insulating the Floor
Insulating the floor can be successfully achieved by a mineral fibre quilt laid between the joists. Use the heavier and denser sound insulation quilt.

Insulating the Party Walls

If you are living in a semi-detached or terraced house, it is often needed to insulate the party walls both against heat loss as well as noise. Introducing timber stud work with mineral fibre insulation will allow you to achieve both and it can be covered with sound-rated plasterboard.
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Location: 143 Franciscan Rd, London SW17 8DS, UK

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