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Effect of mortar type on wall tie corrosion

08 Jul 10 by

Most surveyors are well aware that black-ash mortar causes wall tie corrosion.  However, there are not many opportunities to see this as clearly demonstrated as it is in my video.  I was fortunate to be asked to survey a property in Gargrave, North Yorkshire today.  The pre-war semi, is constructed in a combination of sand […]

Filed Under: Cavity Wall Ties, Surveying Tagged With: ,

Wall tie survey without a boroscope.

10 Apr 10 by

When I first started out in wall tie replacement in 1985, I didn’t own a boroscope, so all inspections were done without one. This is still one of the best ways of inspecting cavity wall ties, though it is time consuming and messy. The boroscope is king these days and if used carefully it does […]

Filed Under: Cavity Wall Ties, Surveying Tagged With: ,

It’s True, cavity wall tie work this bad exists and is being done again as you read….

02 Apr 10 by

I thought I would post an example of just what the wall tie replacement industry can spew out as ‘specialist’ guaranteed work.  I’ve been involved in this work, in and around Yorkshire for 24 years and I can say that quality has improved over that time in my business. However, the 90’s and up to […]

Filed Under: Cavity Wall Ties, Surveying Tagged With: ,

Cintec ties are the thing for rubble walls – see why….

03 Mar 10 by

I visited site this morning where my chaps were inflating Cintec ties using Prestec grout. These ties are great for weak substrates and hollow walls.  They are particularly good for rubble filled stone, where getting a descent fix with a mechanical or resin bonded tie can be difficult or impossible. Katrina, my office manager, has […]

Filed Under: Cavity Wall Ties, Materials, Surveying Tagged With: ,

Testing time for wall ties

03 Mar 10 by

The interesting collapse job in Leeds is now complete.  Well, our involvement is anyway.  My lads have installed the helifix ‘starter ties’ and lateral restraints and this morning, they inflated Cintec grouted anchors installed in the rubble filled areas. The Helifix items are installed in naked brick, so swinging on them is a good test, […]

Filed Under: Cavity Wall Ties, Materials, Surveying Tagged With: ,
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Copyright © 2010 Preservation Expert. Legal Stuff: All the advice and information in the posts on my blog is made in good faith and is based on my experience and knowledge at the time of writing. However, nobody is infallible and whilst I’m confident that most of what I write about preservation issues is accurate, there’s a good chance there’ll be an error or two somewhere. I do change my mind about stuff, as I gain more experience. In view of this you must make your own decisions on whether to follow any advice I write and think about this; I could be wrong. No responsibility will be accepted by the author for any losses anyone may suffer as a result of any mistake or for the consequence of any action you take as a result of reading this blog. If you do suffer a loss, resulting from anything I’ve written, a verbal heartfelt apology will be your only compensation.