Strucsol LocTie 9mm Diameter
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Remedial cavity wall tie for replacement of corroded and failed cavity wall ties.
Works in any combination of Brick, Timber, AAC, concrete.
Small pilot holes mean less visible damage to the host materials
can be secret fixed ( see separate details)
Limited opportunities for installer error.
can be installed by non-skilled operators
High grade stainless steel, appropriate for Coastal regions
No resin required for fixing
No mechanical expansion
cavity wall tie for all materials and cavity widths of up to 150mm
For fixing timber to lightweight concrete block
The hardened fins of the LocTie mechanically fix into the host material in a similar way you would expect a wood screw to work in timber.
The installation process is very much "fire and forget".
The tie is hammered into a predrilled pilot hole and countersunk beneath the surface of the wall with 1 simple tool attachment fitted to a light SDS type drill.
Each tie takes no longer than 10 seconds to fix,
Selecting The Right Wall Tie
Strucsol Locties work in all bricks, concrete and AAC blocks, timber and concrete.
It is essential to establish the thickness of the wall prior to purchasing your remedial wall tie.
if you have access to a window reveal you can measure the wall from outer face to inner surface , Your wall tie should be between 30/50mm shorter than the full thickness of the wall.
If you have a brick outer face it is reasonable to assume the outer leaf is 102mm or 4 inches thick.
Find a mortar joint at a convenient height on the outside of the wall.
With a 7mm drill bit at least 200mm long, drill through the first brick, you will feel less resistance, once you have drilled through the outer leaf of the wall., stop the drill and push the drill into the wall till it meets resistance from making contact with the inner face of the inner leaf of the wall.
Placing a piece of tape of the drill bit where it touches the outer face of the wall, extract the drill bit from the wall.
Measure from the leading end of the drill bit to the tape you placed on the drill bit.
The measurement will usually be somewhere between 110mm and 200mm( measurement A)
Add an additional 70mm( measurement B)
A+B + your ideal replacement wall tie length.
If you have access to an opening window you can simply measure the thickness of the wall with a tape measure and deduct 30mm from the overall thickness.
In rare instances the inner or outer wall surface can be thicker or thinner than 100mm, this can be confirmed by checking the through wall measurement taken at a window or door reveal.
It is not uncommon for cavity thicknesses to vary from wall to wall.
The measurement method detailed above will allow for approx 20mm of wall thickness variation.
Are far more complicated to tie together whilst most stone walls have been built without mechanical wall ties , it was common to use timber or Stone ties to hold the face stone on the outside of the building to the random stone on the inner leaf.
We would strongly recommend that you call our technical support team for further advice ,if you intend fit remedial wall ties to a stone wall.
Diameter of pilot drill hole
This will vary depending on the density of the wall materials.
In its simplest form very hard bricks require a larger diameter hole up to 8mm diameter.
Medium density bricks and concrete blocks require pilot holes of around 5mm
Timber and Lightweight concrete blocks require no pilot hole.
Wall tie Density.
Current standards require a minimum of 2.5 wall ties per m2 with additional ties around window and door openings. 225mm spacings 225mm away from the opening.
The typical pattern for remedial wall tie installation to achieve minimum density is 900mm horizontal spacings with 450mm vertical spacings with each row of ties being installed off set from the course below to form a diamond pattern, of staggered spacings.
Secret fixing of wall ties
This is easily done with the locties , where visual evidence of wall ties is not desirable. the ties are installed at an angle of 35/45 degrees facing upwards into the wall. For wall tie length calculation measure the length as described earlier and multiply the figure by 1.4 , this will give the length of the required wall tie.
Existing wall ties.
it is important to establish the condition and nature of any existing wall ties. Some of the heavy gauge iron wall ties can cause significant damage to the wall when the corrode and expand.
Smaller gauge wire ties corrode and have so little iron content that no damage occurs.
Where heavy iron ties are identified it is essential to isolate or remove the wall tie from the outer leaf of the wall.
Once the wall ties are identified by use of a metal detector and chalk, you can use the Strucsol raking chisel to remove the bed joint either side of the tie and drive the tie sideways into the cavity , ensuring the tie is not in contact with the outer leaf of the wall.
Alternatively you can clear the mortar from around the tie and fit a tie isolation sleeve over the corroding tie then make good to the pointing.
Proof testing the ties.
If the work is being carried out as part of a remedial solution to satisfy Local Authority Building control or homebuyers it may be necessary to carry out a "Pull test". The Pull test establishes the tensile performance of the ties , specific to the property in order to demonstrate the tie is performing to required standards.
Strucsol Loc-ties, exceed Current minimum standards in all UK areas.
Strucsol offer a Full design and testing service.
There may also be a requirement for a warranty on the completed project.
Please call out support team if you require further advice on these matters.