Easiest and quickest way to fix timbers to a wall ?

M10 Masonry bolts/Thunderbolts, length around 120mm.

And don't be tempted to drill a larger hole, they need a 10mm & will cut their own thread.

http://www.screwfix.com/p/easyfix-concrete-bolts-10-x-120mm-10-pack/8215p

 

As above, Thunder Bolts, marvelous things!

 

Again, i have used thunder bolts and they are awesome.

 

The only caution is not to let the drill wobble, if the hole becomes too wide or oval the bolts won't grip, you may want to make a "starter" hole with a smaller bit - just enough for the drill to start biting.

You may want to treat yourself to a new drill bit, Screwfix sell Bosch bits that will drill through wood, metal and masony

 

I always use a smaller bit than recommended

 

You can get 9.5mm masonry sds bit, Alpen do them.

 

Got to be careful going smaller, I have cracked some masonry before using a smaller bit. 0.5mm shouldn't make a difference though but it would be interesting to see the tolerance of some bits

 

Never used thunderbolts myself...

Are they a better option than hammer or frame fixings?

 

Yes

 

Far superior fixing.

http://www.unifix.co.uk/sites/default/files/Thunderbolt Technical Information - 20142.pdf

 

Nice,

I'll give them a try...

Best to stick them in with an impact driver or standard wrench?

Can they be over tightened?

 

Do them up with a socket, and yes you can overtighten which will pull them out, although they will do up very tightly.