Wooden Fireplace surround filler 'popping'

[virgilns]

Hello all.

Have a frustrating tissue with a wooden fireplace surround i've built:

Untitled

• virgilns
• 20 Feb 2015
• 1

Untitled

• virgilns
• 20 Feb 2015
• 1

it's made of 28mm thick pine glued (white wood glue) biscuit jointed and screwed together with the trim pieces glued and pinned. Where i've filled the screw and nail holes with a 2 part epoxy filler the filler has expanded and 'popped' (blistered) with the heat from the wood stove.

Untitled

• virgilns
• 20 Feb 2015
• 1

It initially happened nearest the heat of the fire, but over the last few weeks pretty much every 'filling' has 'popped'.

Untitled

• virgilns
• 20 Feb 2015
• 1

looks like now i'm going to have to sand them back and repaint, but i'm worried it will just happen again.

Is there a better way of filling screw holes (plugs?) and harder, small nail holes??

thanks,

Virgil

 

[foxhole]

All the metal expands with the heat so pushing out the filler, you could try just sanding back and painting as expansion should have finished .

 

[DIYedboy]

That's a lovely bit of work, if it was me I'd get a nail punch n drive the pins in deeper then fill with glue/ fine sawdust mixture, (overfill cos it can shrink)