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Where To Purchase Long Thin Bolts.

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Old_Geezer | 13:35 Thu 26th Oct 2017 | DIY
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Related to https://www.theanswerbank.co.uk/Home-and-Garden/DIY/Question1564296.html I'm part way through trying the idea of fixing wood into the wall and bolting through to the garage.

There has been issues, oh the fun of doing it yourself eh ? I managed to chop out the thermal block easily enough, but the mortar was difficult. Very hard. And an angle grinder I tried wouldn't get in and cut it properly (or at all) so I was forced to go bashing away with hammer & cold chisel. Then I used my thicknesser to ensure the wood I used was flat & clean, didn't notice a nail, which only became evident after skimming the side it was on, off a couple of times. I think I may have messed up the thicknesser, I'm dreading checking. No idea if they can be repaired if I have. Then the drill holder to ensure I was perpendicular to the wall, in order to get the holes garage side in sensible positions, didn't fit into the corners so I had to do it 'freehand'. And the holes that I initially marked up and drilled in the wood turned up to want to be half in the block, half in the mortar, so that wasn't going to happen. Managed to drill 2 holes and they don't look too bad.

Issue is that the wall was cavity despite the wall effectively being internal (porch to garage). I measured 255mm from one side to another, and that'll need bolts longer to allow for the washer/nut garage side. Perhaps 275mm ? The holes are presently about 9mm diameter. Ideally they won't need enlarging.

But where can one get such long bolts ? They need to be countersunk really. I don't want to be trying to cut squares out of the wood for coach bolts. Not spotting them on the Internet, and was really hoping to just pop down the road for them, but that looks out of the question.


(A supplementary question, I was planning on glueing the wood in as well. What glues wood to garbage-block well ?)

Thanks.
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You don't need to drill a hexagonal hole to use a bolt or threaded bar. Drill the 8mm hole through the wood and then drill a larger hole halfway through the wood, big enough and deep enough to take the nut and washer. Nut and washer on bar, push it through into the garage, nut and washer and tighten.
14:41 Thu 26th Oct 2017
These are m10 Geezer. It seems that the longest m8 is only 200mm in length.
https://www.tradefixdirect.com/coach-bolts/zinc-plated-coach-bolts-and-nuts-m10-x-280mm
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Job was basically finished yesterday, save the surrounding wallpaper which didn't survive well enough to be pasted back into place. Area needs redecorating now, but it'll wait. Time will tell if it's worked. Cheers all.

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