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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: ,

Resin repair product? Cement repair product? Which to use?

15 May 10 by

Grout, mortar, filler, render, plaster – all these can be based on resins or cement.  In order to know when and what to use, you need an appreciation of the different properties of the materials.  Their weaknesses, strengths and limitations. The following is by no means a detailed guide, it’s a basic comparison of the […]

Filed Under: Materials, 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: ,

Wall ties – they’re not needed are they?

15 Feb 10 by

Wall ties are critical to any building with a cavity wall. It doesn’t matter if the wall is a traditional cavity or a rubble filled, pseudo solid wall. This is an example of what happens when wall ties are lacking.  The gable end of this house suffered catastrophic collapse of the gable in high winds […]

Filed Under: Cavity Wall Ties, 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.