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It will depend on ease of access and acessibility, the condition of the roof, the repairs needed, the size of the roof and the depth of foam needed to achive the U value or insulation value required. A typical 1930's semi detached house is usually completed in 1 to 2 days. A a typical large detached house roof with typical problems will usually be completed within 2 to 3 days. An industrial contract can normally be done at the rate of 150 metres per day per sprayer. ... more
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