Lack of Ventilation leads to Mildew

Recently we undertook an RICS Homebuyer’s Survey in Reading and found mildew staining to the underside of felt and roof timbers. It indicated that the roof ventilation was not adequate, causing moist air to condense on the cold surface on the underside of the roof covering.
This defect is more and more common as building owners are taking advantage of government incentives to improve energy performance in properties, adding additional insulation in their roof spaces. However, if insulation installers are not careful they can block up gaps between rafters at the eaves and prevent the cross flow of ventilation through the roof void.
Ventilation in the roof space is important as it is required to ensure roof timbers are protected from such moisture and the resulting consequences.
A defect like this is not costly to remedy but needs immediate attention to prevent damage to the timber roof structure. Potentially we saved our clients thousands of pounds in future repairs were this defect left unnoticed.
If you’re in need of some advice on a property defect, a Homebuyer survey or building survey, contact us on 01635 579 208.