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Roof Insulation

Vacant lofts not only allow heat to escape through roofs but exacerbate the loss of heat-a result no different for houses with uninsulated roofs. The same is true for additional heat garnered indoors during summers in the absence of insulated roofs. Roof Insulation is no replacement for air-conditioners or heating systems but it certainly reduces their usage and contributes in saving energy and money spent on excess power consumption. In principle: roof insulation is single-pointed in its approach addressing thermal conductivity, however, its scope widens and the insulation process makes it almost obligatory to consult the roof style in question, which invites another decision of choosing between hot or cold roof insulation followed by deliberation over the appropriate material.


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Warm or Cold Roof

Cold Roof Insulations are easy to embed in flat roofs during roof construction, otherwise they invite a lot of tedium and are generally considered cumbersome to install as an afterthought. Its efficacy leaves a lot to be desired when compared with Warm roof insulation which covers the entire roof deck along with the roof covering area as opposed to the limited approach of insulating empty spaces between the rafters in cold roof insulation. Warm roof insulation holds a clear advantage in the functional aspect of maintaining warmth and its installation is easier in comparison with cold roof insulation, which unlike warm roof insulation doesn’t add layers of insulation between the roof covering and roof deck, thereby adding to the height of the roof and altering the structure—an undesirable obstruction for flat roofs—rendering them incapable of hosting a garden or balcony making a case for cold roof insulation.

Blanket Insulation and Structural Insulation Panels

Blanket Insulation choices are largely available as batt or in a roll form both options arrive in fibreglass, natural and mineral wool, and cotton insulation material. Batt insulations are preferred in areas with restricted movement and are easier to deploy in spaces with structural obstruction and are particularly excellent at negotiating uneven dimensions. Roll insulation on the other hand need better handling than batts and are better suited to cover big areas in lesser time than batt insulation. Both options are economical, supplied with varying degrees of R-value (indicative of the resistance to heat flow with the higher the R-value, the better the insulation) and highly effective if properly applied using accurate measurements to fill the spaces between ceiling joists and wall studs. Structural Insulation Panels in polystyrene are available as expanded polystyrene panels serving basic insulation at low costs, and as extruded polystyrene panels which are sturdier, enhanced with additives for moisture resistance and better insulation than the expanded variety. Polyisocynaturate based structural insulation panels are the most expensive and superior to the extruded polystyrene variety in durability, moisture resistance and the insulation quotient.  

Loose-Fill and Spray Foam

Loose-Fill Insulation also known as Blown-in insulation, blows fibres with a blowing machine to fill the spaces left uncovered by batts and are out of reach as far as roll insulation is concerned.  Cellulose and fibreglass fibres are among the most preferred materials with cellulose being the more economical and environmentally sound option that enjoys better reach in the remotest location than fibreglass while being filled into the difficult to reach spaces. Spray foam insulation of the closed cell formulation is understood to be the most thorough of the insulation options available in the market and is by far the most expensive too, delivering air-tight insulation which is moisture-resistant and extremely compact, conversely the open-cell formulation is softer, economical, and lesser effective in insulation than the closed-cell variety, yet possessing the advantage of being more flexible and thereby serving larger areas with greater ease in application in difficult to access cavities and zones in odd spaces.

We hope this primer on roof insulation is helpful and will assist you in reaching a better decision. Please feel free to get in touch with Buildworld to procure high-quality roof and loft insulation products. 

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