Nest Curling: Must Be Due To The Heat From The Roof !!!

A very rare occurrence but you might want to know why those nests start to curled upward.

While inspecting a BH in Setiu Trengganu I saw a large number of nests curly upwards.

This happened on the top most floor  of it while the lower floors shows very little of the same problem.

The nest seems to have shrunk and dislodged itself from its base.

There must me some reasons why this is happening inside this BH and mainly the top most floor.

I later inquired from the BH owner about his roof construction.

He admitted that he did not put any heat insulation above the ceiling made of cement board (1/2 cm thick).

When all the walls were completed there was no cement ceiling on the top most floor.

What he did was to just insert a layer of cement board without proper heat insulation layer.

Above the ceiling is a zinc roof which was also without any heat insulation.

His BH roof trusts were made of wood.

Without proper heat insulation on both the zinc roof and the ceiling floor the temperature on the top floor ceiling must be at least 35*C.

I advised him to quickly arrange to insulate the roof by using heat shield layer like bubble sheet mat.

The bubble sheet mat (QTE) might be able to insulate not only those heat but also Ultra Violet rays.

However during my inspection there were something unusual which makes those nests curled more pronounced or at a dangerous level.

He covered his nesting planks with a plastic mesh mat.

Nearly all those nests that were erected on these mats experienced the most number of curled nests.

His reason for inserting those mats was to cover the planks whose surface according to him was very dirty.

He also claimed that the plastic mesh will allow those birds to properly gripped onto the plank surface.

I have a very strong feeling that the smooth nature of the mesh surface makes the curled process mush easier.

The base of the nests will easily curled up due to very little attachment to the plank surface.

I advised him to remove all those plastic mash and perhaps clean the nesting planks with mild salt water.

He need to be careful with those salt water.  The towel must be squeezed dry before touching the plank surfaces.

Let me show you more of those curled nests.