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Lateral Restraint: The Solution to Bulging Walls

As a property ages, it becomes more and more susceptible to structural weaknesses. Lack of lateral restraint between floor beams and external masonry can lead to the visible symptom of bulging walls: as this bulging process happens gradually over an extended time period, it is often not noticed until the damage is severe

In new build structures, walls are secured to floors during the building process and internal partion brickwork is  connected to the external walls, preventing bulging. When it comes to retrofit applications for older buildings, the traditional remedy was to run a metal rod completely through the building, connecting to point-loaded iron pattresses on the outside: an impractical, unsightly and ineffective solution in restraining the wall as a whole.

Twistfix supply a wide range of load-sharing lateral restraint products which are much less invasive than the traditional solution. It is a simple task to determine the positions of joists, pipework and wiring inside a building affected by bulging, after which Twistfix Lateral Restraint Bars can be installed, tying bulging masonry back to the internal floor structure and thus helping to restore structural integrity.

The retrofit installation of lateral restraints is carried out from the outside of the affected property, ensuring that a minimum of disruption is experienced. After the tie-bars have been wound into the timbers, polyester or epoxy resin is used to firmly bond the bar to the masonry wall.  When completed, the entire process leaves almost no visible trace, delivering strength and security to the structure while maintaining its aesthetic.

Of course, tying walls to the timber diaphragm is only part of the solution; the additional insertion of bed-joint reinforcement to strengthen the facade and retrofit wall connectors to tie it back to partition walls all serve to secure the wall in place and to prevent further bulges and bowing.

The Twistfix Bulging Wall Restraint Kit contains everything required to achieve professional results and forms part of our lateral restraint family of products. Find out more on the product pages and don;t forget to subscribe to our newsletter for updates, how-to guides, special features and exclusive offers.

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Protecting the Past: Restoration of Heritage Structure

Twistfix products are often used as part of remedial plans to renovate and restore listed buildings. One such building is Hall Place, a Grade II listed building located in Portsmouth.

Hall-place

Portsmouth, in Hampshire, along with other exposed areas on the south coast such as Dorset and West Sussex, was one of the first regions in which cavity wall structures became widely adopted. Hall Place, which was built in 1796, is the perfect example of an early cavity wall structure in the UK: when a system of repairs and cavity wall tie replacement was proposed for the structure, Twistfix was the first port of call for the contractors, 1st Master Wall Ties.

Hall Place is built using yellow buff bricks, a prestigious material, sourced from nearby in Dorset. Comprising a 9" structural inner wall and a 4.5" outer façade of Flemish bond brickwork known as 'snapped header', the front elevation of Hall Place features a solid parapet wall. Careful inspection showed that the outer leaf of the cavity wall was out of plumb and exhibited a series of undulations between levels; the soldier course lintels had also failed, leading to cracked brickwork above windows.

The leaves of the cavity wall were reconnected, and the soldier course lintels pinned, using Twistfix helical cavity wall ties. As it was essential to maintain the appearance of the façade, our self-tapping cavity wall tie replacements were used: these ties are installed into the smallest possible pilot holes (just 6mm in diameter) which are subsequently filled to make them practically invisible.

Above the window openings, helical bars were installed. This bed joint reinforcement formed a series of deep masonry beams, enabling all vertical loads to be properly distributed on either side of the brickwork, repairing the cracks and preventing any further movement.

Find out more about the products used for structural repairs or cavity tie replacement on our website.

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Masonry Repair Solutions: The Brick Pin Fixing Kit

Cracks can occur in brick and stone structures for a number of reasons and repairing these cracks is crucial to avoid further damage. Twistfix offer a comprehensive suite of masonry crack repair solutions, many of which are supplied in kit form to ensure that all of the required components are immediately available at once. One of these is the bestselling Brick Pin Fixing Kit.

The brick pin fixing kit from Twistfix contains everything required to effect quick, accurate and long-lasting masonry stitching, repairing cracks at junctions in brick and stone structures. An ideal retrofit solution for the tying layers of variable quality masonry to perpendicular walls, the kit represents impressive cost-effec­tiveness when it comes to concealed masonry stitching.

The brick pin fixing kit contains:

  • 10 heavy-duty masonry stitching bars. Each bar is one metre in length, has a diameter of 8mm and is manufactured using high-quality stainless steel, noted for its remarkable resistance to corrosion
  • One 10kg tub of WHO 60, a specially-formulated masonry repair bonding grout
  • One mortar gun with masonry pinning nozzle set included
  • One mixer paddle

Firstly, pre-drilled pilot holes are made. The holes are filled with WHO-60 polymer modified masonry repair grout, into which the helical stitching bars are inserted, bonding the reinforcement securely to the masonry. The result is strengthened, stabilised areas of wall failure, where tensile forces are evenly redistributed along the length of the helical bars.

Find out more about the brick pin fixing kit on the product page. If you need expert technical advice, simply get in touch with our team.

 

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Flood Restoration: The Twistfix Flood Pump Kit

Flooding causes serious damage to properties and, the longer the floodwater remains, the greater the damage. That's why it's essential to drain floodwater from a property as soon as possible. Twistfix offer a range of flood prevention and remediation products, one of which is the bestselling Flood Pump Kit.

The Flood Pump Kit from Twistfix centres on a fully-automatic and -submersible pump which has been designed for the simplest operation. When operational, this remarkable piece of equipment is capable of discharging up to 10,000 litres of water an hour, which equates to an astounding 155 litres a minute. It can be used on floodwater with a minimum depth of 40mm and a maximum depth of 110mm.

The kit includes a super-long (20m) discharge hose with quick-fix connector. Also included is a filtered tank with integral lid: the pump can operate within this tank for added protection or independently as necessary. All of the components included within the kit are guaranteed to be robust and reliable, manufactured to the highest professional quality.

Domestic properties that are at risk from rising water table levels can use the flood pump kit as a preventative device. The pumping kit is simply stored between suspended floors, where it will automatically switch on in the presence of water.

For more information on the flood prevention, restoration and remediation products available from Twistfix, check out our website.

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Brick Tinting: The Science of Colour

Completely transforming the look of a property is not as difficult and complex as it sounds; at least, not when you use brick staining dye from Twistfix. A comprehensive collection of brick staining formulas is available and here we present a quick guide on how to use them with the utmost effec­tiveness.

Brick Coloured Repair Mortar

Brick Stain Dye

Crack Injection Mortar

Brick staining dye allows you to quickly, easily and permanently change the colour of porous brickwork and is supplied ready-to-use. Within the formula are pigmented powders of superlative quality, dissolved completely in fixative fluid. Once applied, the dye is absorbed deeply into masonry pores, creating a strong integral bond that results in a natural, vapor-permeable finish.

Brick staining dye is a ready-to-use product that allows you to permanently change the colour of porous bricks. Formulated using high-quality pigmented powders, which have been dissolved in a fixative fluid, the dye is deeply absorbed into masonry pores. This creates an ultra-strong integral bond, resulting in a vapor-permeable, natural-looking finish.

Brick tints are a superb addition to our extensive range of colour-match brick repair mortars and crack-injection fillers.  The dyes are supplied in containers of 1L of formula, enough to dye around 20-25 square metres of masonry (dependent on required shade depth and masonry porosity). Throughout the staining process, the masonry texture is unaffected. A patch test is recommended before beginning, in order to ensure correct shade and coverage.

Though supplied ready-to-use, brick tint formulas may be diluted (to a maximum 2 parts water to 1 part formula) in order to achieve a lighter shade. The dye is simply applied with a brush directly to the face of each brick and left to dry, after which further coats can be added to deepen the shade.

There are several shades available, along with a brick staining soot wash and a limestone tinting dye. For further information on these products, check the website or get in touch with our team.

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Mould Removal Products: Our Professional Collection

Damp has many negative effects on a structure and one of the most noticeable of these is the growth of mould and mildew. Outbreaks of mould should be dealt with swiftly to avoid further problems and, here at Twistfix, we supply a selection of products designed to help.

Mould is a microscopic fungus that grows from spores carried in the air. The fungus, which is a dark green to black colour, grows best in damp and humid conditions, migrating deeply into the substrates of porous materials like plaster, plasterboard and masonry. As well as being unsightly, the mould will begin to rot wood and wallpaper and, if left untreated, can have serious negative effects on human health, particularly related to allergic reactions and respiratory illnesses.

For a complete solution, we recommend Twistfix Mould Remover Kit. This professional kit includes everything necessary to achieve lasting results, eradicating toxic mould and preventing it from recurring in the future.  The cost-effective kit contains:

  • 1 x 1,000ml Mould Remover Biocide Spray. The product is supplied in a ready-to-use spray bottle containing sufficient formula to treat ten square metres of wall surface
  • 2 x 100ml Fungicidal Additive. After treatment, mix 100ml of fungicidal additive with 5L of emulsion paint/10L of solvent or gloss paint and apply to the treated wall to prevent regrowth of mould
  • Gloves, Goggles and Sponge. These accessories will ensure you can work safely and efficiently.

Both Twistfix Mould Remover and Fungicidal Additive are available separately from the 'Mould Remover Products' section of our website, where you will also find information on our unique ThermalDry Anti-Condensation Coating. Don't let mould damage YOUR property: take action today!

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Wood Treatment: Protect & Preserve

Wood is such a versatile construction material that it has been used for thousands of years. As an organic material, it is strong and beautiful but vulnerable to damage in a wide variety of ways: Twistfix is proud to supply a comprehensive collection of remedial and protective timber treatment solutions to these problems, supplied as both concentrates and ready-to-use products.

Here we look at four of our most popular professional wood treatment options, two of which are supplied ready to use and two of which are supplied in a concentrate form; the concentrates require diluting with water prior to use.

No More Rot Insecticide

Specifically formulated to eradicate infestations of wood-boring insects, such as woodworm, No More Rot Insecticide is supplied in liquid form and is ready to use straight from the container.  Whether used on doors, windows, floorboards, roof timbers or any other interior woodwork, the highly effective formula penetrates wooden surfaces quickly and deeply, destroying wood-boring insects and preventing the occurance of further infestations.

No More Rot Dual Purpose

With all of the qualities of No More Rot Insecticide, this liquid timber treatment also contains fungicides that attack both wet and dry rot along with blue stain. The product can be used on internal or external timber though requires sealing with a weatherproof finish when used outdoors. Simply applied with brush or spray, No More Rot Dual Purpose is a highly effective insecticide/ fungicide that is virtually odourless for comfortable, safe application.

Microtech Insecticide Concentrate

For larger-scale projects, it makes financial sense to use concentrates. Microtech Insecticide is sold in 150g containers, the contents of which produce 25 litres of solution when diluted. The product rids timber of wood-boring insect infestations and prevents re-infestation.

Microtech Dual Purpose F/1 Concentrate

In addition to being an efficient woodworm killer, this dual purpose timber treatment is effective against fungi, wet/dry rot and blue stain. Microtech Dual Purpose F/1 Concentrate is sold in 150g containers that can be diluted to create 25 litres of effective wood preservative treatment.

Discover the full collection of wood preservative treatments on our website. Need advice on choosing the right product? Just give our skilled technical team a call.

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Ultra Crete: For Permanent, Professional Pothole Repair

The beautiful weather over the Easter holidays had thousands of us jumping into the car to enjoy a well-deserved day out. That meant that many of us discovered just how far-reaching the extent of potholes really is! Now that spring is here and summer is just around the corner, it's time to take back our roads, paths and driveways: the ideal solution is available right here at Twistfix...

We are proud suppliers of the Ultra Crete Asphalt Repair Kit to both the domestic and industrial sectors. Whether you're a private contractor, local council or competent DIYer, this versatile cold-lay asphalt is designed to deliver professional results when it comes to the delicate job of pothole repair.

Potholes begin as tiny hairline fractures, caused by vibration and surface fatigue. Gradually, the edges of these cracks work loose, becoming worse and worse over time. During the winter, the freeze-thaw cycle widens the crack even further, dragging the surface material apart and creating potholes.

On driving surfaces, potholes are a serious impediment to safe driving. Loose material from potholes can damage cars and, as the material is dislodged, the pothole becomes even wider. When it comes to walking surfaces such as paths, pavements and patios, potholes are are danger to pedestrians, particularly the elderly and people with impaired mobility.

The Ultra Crete Asphalt Repair Kit centres on 3 x 25kg resealable, recyclable tube of quality cold lay asphalt. Also included in the kit is a 750ml spray can of Bitumen Cold Joint Sealer, which helps to prevent further water ingress. The formula can be used effectively whatever the weather and on a wide variety of surfaces, from roads and paths to driveways, car parks, patios and sports courts.

Find out more on the product page. Need further advice? Get in touch with our experienced technical team.

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Remedial Wall Ties: A Brief Guide

Remedial wall ties come in a variety of forms, each suited to a particular repair application. Whilst each system works by different means, they all deliver the required result of securing the outer brick façade to the inner layer of a cavity wall structure.­  Twistfix supply a comprehensive range of these vital structural components.

Cavity wall tie failure is typically caused by the aging process of a building, whereby steel wall ties begin to rust.  As the wall ties corrode, the load-sharing capacity and stability of a cavity wall structure may be impaired.  On newly built structures, tie failure may be a result of at least some of the original 'built-in' brick ties having been omitted.  Whatever the cause, you will find the right retrofit product here at Twistfix in the dedicated 'Wall Ties' section of our website.

255mm-Ties-150kit 2Neoprene-Replacement-Ties 2Teplo-Ties 2Twistfix-301 2

Helical Wall Ties 

The Thor Helical® CD Tie is a patented one-piece stainless steel tie of superlative quality.­  Formed by a process that delivers work-hardened threads, these helical brick ties are designed to deliver fast, consistent results in all types of masonry.­  Installation is exceptionally easy; a tiny 6mm diameter pilot hole is drilled into the walls and the tie is hammered into it using the SDS driving tool.  The oversized threads cut into the masonry as the tie corkscrews into the wall, gripping the masonry on either side of the cavity and locking it in place.  Our helical wall ties have been independently tested and accredited for use in solid bricks, perforated bricks, concrete blocks, aircrete blocks and concrete.

Mechanical Wall Ties 

Our Platinum® range of mechanical ties are available with a choice of expanding neoprene or expanding brass sleeves.  The expanding mechanisms are located at each end of an integral austenitic stainless steel tie bar and a partially-threaded 'tall-nut' is attached at one end.  The ties are inserted into a 10.5mm diameter hole and a drill-powered drive-socket is used to rotate the bar to force open the first sleeve, which grips strongly to the remote masonry layer.  Once a factory-set torque level is reached the 'tall-nut' travels down the tie bar, forcing the second mechanism to expand and grip the wall to form the near leaf connection.

Resin-fix Teplo-Ties

Designed with thermal efficiency firmly in mind, Teplo® Ties are manufactured from a composite of basalt fibres.  Basalt fibre is a thermally efficient alternative to stainless steel replacement wall ties and are suitable for use in remedial resin-fix applications. This tie has an extremely low thermal conductivity of only 0.7W/mk, making it an ideal option for those looking to insulate the cavity after the walls have been re-tied.­   The tie is resin fixed into 10mm diameter holes to provide an adhesive grip in both wall layers.  By removing thermal bridges, Teplo ties dramatically improve the insulation abilities of masonry while simul­ta­ne­ously reducing carbon emissions. Teplo ties are regarded as the most thermally-efficient replacement cavity tie available.­ 

Screw-in Cavity Ties

Tiger Screw-In Wall Ties are used when the only repair option is to re-build the outer layer of a cavity wall.  The tie has a neoprene expanding mechanism at one end with a traditional triangular shaped tie-wire at the other.  To fit the stainless steel tie you simply require a drill and 8mm drill bit.  The neoprene end is inserted into the hole and the tie is turned by hand to tighten the expanding mechanism.  The triangle end is simply laid into the mortar beds as construction of the outer layer proceeds.  These are the quickest and easiest ties to use in partial rebuild applications and require no special tools for installation.

Find out more about our comprehensive collection of remedial wall ties on the website. Need help choosing the correct tie? Get in touch with the Twistfix Wall-Tie-Guys for clear, expert advice.

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Comprehensive Weed Control: Our Professional Collection

The combination of longer hours of daylight with those dreaded heavy April showers means that all forms of plant life are currently enjoying a growth spurt in the warmer, wetter conditions.  While this has the definite upside of beautifying our gardens and outdoor spaces, it also hails the beginning of every gardener's worst nightmare: the invasion of the weeds!

Weed control is serious business and requires the use of professional-grade solutions that have been specifically designed for use by profes­si­onals. That's what you'll find here at Twistfix in the dedicated 'Weed Control' section of our website.

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Roundup ProActive

The gardener's go-to solution for many years, Roundup ProActive is designed for general use on hardy weeds. One such weed is ivy which, with its quick growth and tangled root and stem system, can damage buildings and trees. Roundup ProActive makes short work of ivy and other hardy weeds growing on hard ground.

Roundup Provantage 480

A more-advanced weedkiller containing glyphosate, Roundup ProVantage 480 can be used to control perennial and annual weeds. Though a powerful formula, it is safe and non-toxic to humans and animals as it disables enzymes only found in green-leaved weeds.

Knotweed Control Treatment

Ground-invasive plants such as hogweed and Japanese knotweed stand no chance against this formidable opponent, supplied in a cost-effective kit containing three packs of weed killing formula. It is essential that such weeds are quickly treated: hogweed causes severe burns and Japanese knotweed is so pervasively damaging that it is illegal to leave it untreated if it is on your property. Use with our specially-designed knotweed injection gun.

Tree Stump and Root Killer Plugs

Tree stumps are at best unsightly and can even pose a danger from tripping if concealed by fresh growth. These highly-effective components comprise a nylon Eco-Plug capsule which, filled with granular glyphosate, are pushed into pre-drilled holes (calibrated drill bit supplied) in the tree stump. The chemical migrates to the root system and destroys it, with no adverse effect on surrounding vegetation.

Find out all the details you need in the 'Weed Control' section of our website and do not hesitate to contact our skilled technical team for further information and usage advice.

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