Hi - I had fitted an external canopy to the outside wall of my house, but have now removed it. The brackets were fitted to the wall using expansion bolts. I want to remove those as well. Are there any techniques for that to minimise damage to the wall.
Cheers
JIP
Re insert the bolt leaving it 1/4" loose. hit the head into the wall with moderate blows. If the head moves in unscrew it a little and then tap from side to side and up and down. I may well wiggle free but not guaranteed. If it won't come out, leave it alone and just fill the hole.
Bob
Chuckle, when a friend did this half a brick fell out. I'd also not suggest an angle grinder either!
Brian
Hence the suggestion of "moderate blows"
Bob
See the recent thread started by Janet Tweedy
there are several factors that can affect the likelhood of removal with minimal damage
If the bolts are the 'old fashioned' Rawl Bolt then putting the bolt back in loosely and gently tapping the head can release the nut from the jaws and the outer can then be levered out without damage or hooked out when the bolt is removed again. Indeed if you have not hit the nut too far it will come out as well
If however they are the sleeve anchor type where the thread is sticking out of the wall and the sleeve only a mm thick an angle grinder would be a good bet as there is no way to get at the sleeve
Some of mine will never come out without damage as the hole went into the frog in the brick and the sleeve expanded there
tapping below the surface and filling is often the only easy option
Regards
Aah - yes, they are the latter - will have to get hold of an angle grinder.
Many thanks
Angle grinders are pretty "de rigeur" for readers of this newsgroup.
As is car body filler. And WD-40 (however useless it may be). Fein Multimasters (or equivalent) seemed to fizzle out a couple of years ago. Aldi (or was it the other one?) drain cameras were in vogue for nearly three weeks until people found they weren't quite flexible enough for colonic self-inspections...
I suspect a therrmic lance might be "the" tool for 2012. But probably not for colonic work.
If they are the expansion tube type, you can cut the ends off, but they can corrode eventually and split a line of mortar if under a window or such like.
If they are only in about 70mm you can drill them out by using a sintered diamond core drill of 16mm or 20mm from Hong Kong (Ebay). The hole in the core goes around the residual bolt. This technique is also great for removing broken off bits of cast iron guttering spikes that have corroded off flush or recessed into brick work, swollen and cracking mortar lines, then just fill in after.
If they are deeper you can still use this technique, but then may need to use a small SDS or drill around the base until the bolt gives up its bond.
Then just a matter of matching the mortar colour (small bags on Ebay, mix & let dry to gauge amount), and pointing back up.
If they are not corroding and you have a sticking-out-stud likely to snag on someone you can screw acorn nuts over them (domed nuts).
Interesting idea
So you slide the core drill over the protruding thread
Learn something every day
I have never bothered with a core dril for such a small hole anything up to25mm I use conventional drills
What is the general benefit of using such small size core drill and how do you get them to centre correctly to start with in normal use?
HomeOwnersHub website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.