What are these?

[600rob]

Not directly a carpentry/joining question but i came across a couple of these when repairing a sill

DSC_1736

• 600rob
• 16 Sep 2018

Anyone know what they are??

My first thought was some sort of woodworm but the timber doesnt have any of the small exit holes normally associated with it.

Have applied a good dose of wood treatment for good measure anyway

 

[KenGMac]

600rob, good evening.

Is the sill a hardwood?

Sorry but it is not easy to tell from the posted image.

Ken

 

[Burnerman]

Moth pupae shells?
John

 

[600rob]

600rob, good evening.

Is the sill a hardwood?

Sorry but it is not easy to tell from the posted image.

I beleive it is hardwood.

Ken

 

[KenGMac]

?

Were the shells embedded or under the sill?

Ken.

 

[600rob]

Moth pupae shells?
John

Not so bad then if that's what they are

 

[600rob]

?

Were the shells embedded or under the sill?

Ken.

yes they were under the sill when i removed it

 

[KenGMac]

OK

Under the sill would then agree with Burnerman.

Old shells.

If they were embedded in the timber? could be that in hardwood that can indicate that the old shells were some sort of a wood borer prevalent in the tropics, some sea borne borers can leave holes up to 20.mm. Dia? [Hence the royal navy a couple of hundred years ago cladding the underside of fighting ships with copper] -- a copper bottomed bet ---

I have come across several cases and at times pupa in odd areas, several under door standards embedded in concrete in bin stores never ever found out what they would have emerged as

Ken