A Thatch roof is a warm and dry place for pests to live and if it is a straw roof, there will almost certainly be some grain left in it, which will provide a food source for rodents. Thatched properties that are left empty or only used for several months of the year tend to suffer more from animal pests who enjoy the peace. In saying this, you can still find pests in your roof at any time of the year.
The Most Common Pests are: Birds, mice, rats, pine martins and wasps. Whether the house is occupied or not, a thatched roof is a warm and dry place during a wet windy winter for critters to shelter.
A wheat straw ridge is quite attractive to nest building birds, and they will pull straw from the roof to make their nests. With the most common of these being sparrows, which were often referred to in the past as “thatch birds”.
In the spring they have been known to plunder a thatch to build a nest, pecking out straw over a concentrated area making holes appear. Other offenders are crows, magpies, jackdaws and jays.