Anyone know what this is?

[MissyD]

Having some building work done and found this brush like thing between the walls, anyone know what it is?

 

[Chrishazle]

Builder hiding something he did not want found for whatever reason??? Looks like something Cora uses for removing spiders webs around the house (would not be her house without spiders webs!!).

 

[Tonye]

Not sure but be careful, it might have teeth

 

[Darrell]

I’ve done dozens of extensions etc and not seen this before.

 

[whitenemesis]

To stop granular cavity insulation escaping should window be removed or replaced.

 

[Scooby_Doo]

To stop granular cavity insulation escaping should window be removed or replaced.

Ditto.

 

[ChrisEdu]

I think the previous builder might have been a furry.