Galvanised steel wall ties
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One method of repair identified by BRE Digest 329 is the use of polyurethane foam injected into the cavity. A suitable polyurethane foam system may be injected into a masonry cavity wall by injecting liquid polyurethane through properly spaced holes in the outer leaf. The foam expands in the cavity...Explore the subscription options here to get full access to isurv, including downloads.
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