Help from the Experts...
At Twistfix, there isn’t much we don't know about damp. In fact, we are pretty sure we know all there is to know about this pesky problem and, if you're reading this, then chances are you have come into unwelcome contact with it and need some help. Or perhaps you are one of the ‘be prepared’ types and want to avoid the problem before it happens. In any case, you're going to need our how-to guide on damp proofing walls, the Twistfix way.
Rising damp, the inexorable and persistent movement of groundwater upwards through permeable masonry, that is to say, walls. Water is funny stuff with many odd properties (including expanding as it freezes, unlike all other liquids) and one of these is capillarity, an electrochemical process in which water molecules are so attracted to the mineral surface that they overcome gravity. The result: damp walls leading to all sorts of other issues with the structure and the growth of moulds that are extremely harmful to human health.
A Damp Proof Course, or DPC for short. There are two types: one is a barrier impervious to water which is usually laid directly along bed joints during building construction. This is complemented by the remedial chemical DPC, which can be used successfully in a retrofit application by trade specialists and other competent structural workers and DIYers.
Usually, damp proofing chemical product is applied along the base of affected walls, lining the pores though not forming an impervious physical barrier. The aforementioned tendency of water molecules to be attracted to masonry is prevented as the chemical neutralises the charge attraction of the masonry pores.
The chemical DPC system chosen should be specifically designed for introduction to mortar joints, as it is the mortar that offers a continuous passage through which water can rise; DPC introduced into single bri9ck or block units will not prevent this rising. A height of at least 150mm above external ground level and beneath ground floor joists internally is required by BS 6576:2005: as close as possible to the floor is acceptable if the joists are solid. Incompatibility issues require the services of a professional and our trained staff are always available to help out.
At 100-120mm intervals, holes are drilled into the mortar in preparation for DPC cream to be dispensed. Migrating fully and rapidly, the cream will penetrate deeply and create the damp proof course. Any additional injection holes require vertical drilling, following a zigzag pattern through the mortar-line up to a height of one metre. The holes should then be injected with DPC cream, forming the vertical DPC that will effectively prevent damp transmission from any abutting wall.
High pressure injection fluids have been superseded by more effective DPC technology, readily available from Twistfix. The thickening agents relied upon by older creams are no longer required to turn the product into a workable mixture with the right viscosity; our Damp-Cure DPC, with its silane.siloxane formula, is thickened purely by emulsification. This means that the remarkable cream is 100% active, compared to the previous generation of DPC’s which boasted a pitiful 60% active ingredient content at best and sometimes as low as 10%.
The Finishing Touch
Groundwater that has risen through masonry pores will have left nitrates and chlorides behind. These salts are hygroscopic, which means they can absorb moisture from the air around (a quality that increases with humidity). Even when the water source has been eliminated, the absorbed salts will continue to attract airborne water vapour, meaning that damp continues to be an issue even after the DPC installation. Replastering the wall after the job is complete is therefore not only an aesthetic issue but an integral part of the process; indeed, replacement of wall plaster after the installation of a DPC is a requirement of BS 6576:2005 (the Code of Practice for Installation of Chemical Damp Proof Courses).
Seeing is Believing
We have put together a video with lots of details and information about damp proofing walls and you can watch it. Defeat Damp the Twistfix Way!
Any repair, renovation or construction project first requires extensive analysis in order to ensure the correct tools and products are used. Twistfix supply a comprehensive selection of analytic tools and instruments that are guaranteed to provide accurate results on most environmental factors.
The Protimeter Mini is a digital moisture meter with such a superlative level of quality that it has become the best-selling product of its type in the UK. As the first selection of many surveyors and damp proofing professionals, the Protimeter Mini is expertly-designed to accurately measure the levels of moisture before displaying this essential information to the user via a clear, concise LED display which also features colour-coding. In addition to this display numerical scale effectively reads the moisture content of wood, showing this as a percentage figure that compares with a relative moisture equivalent for other materials such as masonry and brick walls.
With an innovative optical system that boasts superior levels of precision, the Twistfix Rigid Boroscope allows simple, rapid inspection of ties buried within cavity walls. The product also effective for viewing in other areas where access is restricted and this quality is further enhanced with the addition of a powerful halogen lamp. The unit is supplied with a rechargeable battery and charger, making it one of the most cost-effective and essential choices available within our extensive surveying selection.
Particularly suited to the quality control of cavity wall tie installations and pre-contract product suitability tests, the Twistfix Wall Tie Testing Kit is one of our most popular products. The kit comprises a high quality tension tester engineered with a 3.5kN capacity guage and an adaptor key specifically designed for testing Twistfix helical ties. Utilising a load-cell in conjunction with a mechanical pulling mechanism, this tensile testing kit accurately measures tension forces and features an integral bridging unit.
Damp comes in many forms and, though probably the most well-known, rising damp is thankfully the least common. When rising damp occurs, it is essential that the problem is corrected as soon as possible.
Moisture, particularly groundwater, will naturally and gradually seep into porous masonry, rising into the wall via capillary action. Water becomes water vapour as moisture evaporates from the wall in a continuous wetting and drying cycle. As it evaporates, chloride and nitrates (hygroscopic salts) dissolved within it are left behind on the wall surface, building up and having potential to draw in further moisture from the atmosphere. It is generally thought that moisture will rise to a height of about 1metre before evaporating and leaving behind a salt band. The deposited salts and a clearly visible tidemark of moisture are the two most obvious signs that rising damp is present within a wall.
Rising damp is most commonly found in buildings to which a damp proof course has not been applied. It can also occur in buildings where a damp course is present but has failed. There are many possible causes of DPC failure but 'bridging' is the most common reason for a damp proof course to stop functioning. The simplest cure for damp caused by bridging is to remove the bridge and allow the DPC to function correctly. This may involve reducing external ground levels and/ or clearing blockages from cavities. Where this is not possible or practical a new DPC can be injected. Removing the salts is essential to break the cycle in which more and more moisture is drawn to the masonry, exacerbating the damage. To repair this insidious form of damp, it is important to select damp proofing products of the highest quality to be utilised by a competent person.
The Twistfix Rising Damp Kit contains everything required to effectively damp proof 30m of single-leaf wall or 15m of 9" walls. At the core of the kit is three litres of high-quality DPC injection cream and five litres of waterproof plaster additive. Formulated with the use of an innovative emulsification process and without the use of thickening agents, the 100% active silicone-based damp proofing cream is designed to rapidly migrate throughout the pores of damp masonry, quickly forming a complete chemical damp proof course. The plaster additive, when diluted and added to the render mix, acts as a salt-inhibitor to restrict the movement of salts as the moisture evaporates and the wall dries out.
Along with the damp proofing cream and plaster additive, the Twistfix Rising Damp kit also contains two professional SDS drill bits, an injection extension tube and a heavy-duty caulking gun. To ensure the product is used safely, a pair of protective gloves is also included within this comprehensive rising damp treatment kit.
For information on rising damp treatment available from Twistfix, please contact our expert technical team.
Cracked masonry is one of the most common structural defects. The problem is particularly common in older buildings and, to avoid further damage and the possible collapse of the structure, any cracks must be quickly repaired to restore the safety and structural integrity of the property. Helical crack stitching bars are the best way to repair cracked masonry, quickly providing the much-needed support required to give the building a continued service life.
The process of repairing cracked masonry using helical crack stitching bars is simple yet delicate and must be carried out by trained and trusted contractors to ensure the job is completed to a safe and professional level. Helical bars are retrofitted directly into the masonry, reconnecting any cracked areas which are then grouted over to form a tight, lasting seal. The innovative helix shape of each bar is designed to enhance flexural and tensile strength within the masonry, fully redistributing load forces along the full length of each bar. This increases the stability of the structure and guarantees that any further sagging, movement or cracking of the walls will not occur.
Twistfix Helical Crack Stitching Bars are manufactured in the UK to patented engineering tolerances. Rendered in high-tensile 304-grade stainless steel to provide the ultimate in strength and corrosion-resistance, the products have been rigorously tested in order to ensure they meet and exceed every official specification, including conditions for CE Marking. The bars are available in a choice of three sizes and in packs of ten; installation will require the use of masonry repair grout along with accessories, all of which are also available from Twistfix separately or as part of a comprehensive kit. Look out for a news article detailing our masonry repair and crack stitching kits soon.
Our helical crack stitching bars form an integral part of our masonry repair systems and solutions. For more information on our comprehensive range of products, including remedial wall ties, please contact our dedicated technical and customer service team.
Everybody knows just how dangerous fire can be and how easily it can get out of hand; some of us have been unfortunate to experience the effects personally. Fire’s capability to get out of control is legendary and a simple stray spark can quickly grow from nothing to an uncontrollable inferno. It makes sense to take as many precautions as you can against disaster and fire retardant paints and coatings are an excellent first step.
It’s a quick, easy and inexpensive job, that might just save your home or even your life, to apply our quality fireproof varnish to wood and any other timber derivatives while you’re at it. In just three simple, clearly-defined steps, you can provide Class 0 Fire Rated Protection to your property. Here come the tech specs…
- ThermoGuard Fire Retardant Varnish comes as a kit comprising activator, top coat and the all important intumescent varnish base
- Each kit contains sufficient product to coat around twenty square metres
- If there is a fire, the base expands dramatically in response, forming a tough, fire-resistant carbon char to insulate the wood from the worst of the flames and heat - smoke is held back too and this is all confirmed with stringent EU testing
- Final topcoat gives a durable and decorative finish so it’s great to use for internal woodwork or external cladding; a totally clear formulation lets the substrate shine through with its natural glory but with infinitely enhanced peace of mind, it's a combination that’s difficult to duplicate
- Choose from satin or matt finish; both offer UV protection on top of the fire protection so nothing is going to stand in your way, whatever the British weather decides to chuck at us next!
Choosing a professional product like this from a reliable supplier like ourselves is the winning combination that will put you, your family and your property in a safer place. Our product range will always reflect quality, diversity of choice and competitive pricing; our fire retardant varnish is no exception so why not check out our attractive price discount...?
The terms 'resin anchor' and 'chemical anchor' relate to the selection of steel bolts, studs and anchorages used in conjunction with a resin-based adhesive into a concrete or masonry substrate. When carrying out this complex and delicate process, it is essential that the correct type of resin is selected in order to ensure the strength and durability of these fixings. Understanding the varying qualities of different resins makes choosing the right one much easier.
Chemical anchors are perfectly suited for use in high-load applications as the resultant bond achieved exceeds the strength of the base material itself. Based on a system of chemical adhesion, the base material receives virtually no point-load stress, unlike when using expansion-type anchors. This makes chemical anchors perfect for close-to-edge fixing, group anchoring, reduced-centre and for use in masonry with low or unknown quality and compressive strength.
Unsaturated polyester is a reactive resin used to produce dual-component injection mortar. This process involves combining unsaturated polyester resins, some of which have been dissolved in styrene, to quickly create injection mortars that are simple to use. In alkaline media, unsaturated polyester resins may offer limited chemical resistance.
Epoxy acrylate resins combine the efficient mechanical and thermal qualities of epoxy resins with the ease-of-use and speed offered by those made from unsaturated polyester. Also known as vinylester resins, these new-generation products are styrene-free, relying instead on less harsh dimethacrylates as a reactive solvent. These resins and the mortars produced from them show a much higher chemical resistance than unsaturated polyester resins, particularly when used in alkaline media.
Epoxy resins offer the highest performance and highest strength chemical injection anchoring solution for heavy duty structural applications. Premium grade epoxy resins deliver great mechanical and thermal properties, show incredibly high chemical resistance and are almost 100% shrink resistent. A strong compound-properties profile means epoxy resins easily achieve outstanding load values when used in large annular gaps and diamond-drilled holes.
Twistfix supply a comprehensive range of anchor resins and our expert team are always available to offer clear advice and information on selecting exactly the right product for the job. There are lots of ways to contact us so do it today and drop your anchor in the right place every time with our chemical anchors!
Once the quality of Twistfix products has been discovered, our loyal customers come back to us again and again, confident that we can provide the best quality construction materials at the most competitive price available in the UK. This results in certain products reaching the top of our ‘Best Sellers’ list, which you can instantly access from the home page of our website to find the products you use most at-a-glance.
The Twistfix ‘Best Sellers’ list of products alters all the time as we introduce new products and as customers’ needs change with the seasons. All items in the collection are available with a price discount to make them even more appealing; you can currently save up to 42% on items including:
Cavity Wall Ties Remedial Kit
CE Marked, this comprehensive kit is a firm Twistfix favourite and contains ties sufficient to treat around 60 square metres of wall. The dynamic AirTwist design delivers a powerful, lasting undercut fixing when simply driven into small pilot holes in any kind of masonry wall. Included in the kit along with 150 stainless steel wall ties are two SDS tungsten carbide drill bits and a remedial wall tie setting tool that, rotating around the end of each tie, delivers precise and penetrating hammer blows to drive the tie into the wall, gripping the brickwork on either side of the cavity. Advanced, newly-developed and recently-patented, this superb cavity wall tie system is now available with a massive 42% price discount from Twistfix.
Lateral Restraint Wall Tie Kit
Bowing and/or bulging masonry walls can be immediately and safely repaired and stabilized using the Twistfix lateral restraint wall tie kit, which is now available with a 23% price discount. By firmly retying the bulging masonry to the internal structure of the building’s floor or roof timbers, load-spreading lateral restraint bars solve the issue by locking the walls firmly in place. The tie bars are available in a selection of lengths and are installed from outside to ensure that minimal disruption is caused. The kit includes five lateral restraint tie bars along with the necessary long-series SDS masonry drill bit and tie-setting tool to form the timber connection. Styrene-free resin is also supplied with applicator and mixer nozzle to form a secure connection to the brickwork.
Masonry Crack Repair Kit
Suited to a variety of professional reinforcement and brick stitching applications, this kit centres on helical crack stitching bars and now features a 37% price discount from Twistfix. The helical bars are designed to redistribute tensile forces along their full length, effecting a comprehensive masonry crack repair that will both strengthen and stabilise cracked walls. The kit includes 10 grade-304 stainless steel helical crack stitching bars in a choice of sizes, innovative WHO-60 masonry repair grout in a 7kg tub (yielding 3l of product), Grout-Master Applicator with convenient integral Hi-Flo nozzle, mixer paddle and brick jointer.
These brick wall strengthening products are just some of the eight products currently topping the Twistfix charts. Want to see more?
Wall ties, starter ties, wall starters, starter staples. It seems there is a bit of confusion when it comes to these… whatever you call them – and with all these names, it isn’t too difficult to see why.
They all do the same sort of job, which is providing a place to begin erecting an extension to an existing structure safely and strongly, but there are differences as to which you use on what type of structure. Our helpful Q & A should sort everything out for you and have you tying masonry skins like a pro in no time. What, you didn’t know your house had a skin?
What exactly IS a wall starter staple tie?!
A wall starter is a component which connects a new extension wall to its parent masonry building. The wall starter is known as a tie because it ‘ties’ or joins wingle skins of masonry together - this ‘tying’ can also be achieved with the use of the innovative Twistfix staple which allows you to simultaneously join both leaves of new cavity walls to existing masonry structures. All clear?
What types are available?
I want the whole package!
Then go for the Universal Wall Starter Kit, an impressive selection of products at an equally impressive price from Twistfix. Perfect for all your needs from a conservatory to a greenhouse or full-n extension, the kit is comprehensive - to find out what’s inside, just visit the product page where there are HD photos and all the tech specs.
What’s the Catch?
The catch is that if you don’t order soon you may simply have to pay a low price for your wall starters, instead of the RIDICULOUSLY low price they are now available at! We are talking big discounts and if you’re a trade customer then those discounts will look even more attractive for bulk purchases…
If you still aren’t sure which wall starters would be right for your project then why not pick the brains of our technical team? They love being able to show off their (admittedly impressive) knowledge and you’ll love the clear, concise and competent advice you get – sounds like everyone’s a winner to us! Call today or chat LIVE online...
If you want to provide safety and save money at the same time, then today is your lucky day. Our September offer on intumescent paints got all of you so fired up (pun intended!) that we have extended it throughout October in case you missed out or want to stock up more while it remains at our super-low price. Hurry though, because soon the price will return to its former level of plain low!
Making a building as safe as it can be in the event of a fire is a standard part of any construction or renovation project. It is particularly important for landlords and employers as the Fire Safety Order 2005 demands that all current fire standards for the entire building, including stairways, basements, corridors and lobbies, are fully complied with. Twistfix supply a comprehensive selection of intumescent paints and flame-retardant coatings for steel and timber, clear fire varnish and other coatings suitable for use on walls and ceilings.
Thermocoat W, a water-based, environmentally-friendly intumescent paint system, provides steel and cast iron with extensive fire-resistant properties for up to two hours with the minimum number of coats applied. In the event of a fire, heat causes a catalytic reaction within the paint which then causes an insulating char to expand to up to fifty times the thickness of the paint. This thick layer keeps the metal below its critical temperature and maintains the building's structural integrity.
The paint is user-friendly with a low odour and can be easily and quickly applied by roller or brush through an airless spray is recommended for the quickest, most professional finish. Timbercoat and Wallcoat intumescent paints, fire-retardant varnishes and other coatings designed for use on timber, walls and ceilings are also available and feature these same fire resistant properties. When applied according to all instructions, Thermoguard products comply with all relevant health and safety laws and when applied to the correct specification control surface spread of flame and fire propagation to Class 0 and EN Class B
A final overcoat, also with extensively-tested flame-retardant properties and available in Hard Matt or Eggshell, completes this comprehensive fire protection system. These decorative finishes protect a building from flames should a fire occur whilst also being aesthetically pleasing. Helping to keep surfaces below a critical temperature, the coatings also assist with the control of fire hazards by releasing an innovative extinguishing gas when exposed to flames, actively suppressing smoke particles and flaming droplets
All Twistfix intumescent paints and coatings carry the same guarantee of quality as our entire range of products and are available at our usual competitive rates. Our service extends to providing a full paint specification for any individual project and, on request, issuing a certificate of supply for insurance, building control and client records. Thermoguard products are available in an assortment of kits or can be bought individually. Full instructions are supplied though we are always available to offer advice, assistance and support; we recommend allowing our experienced and dedicated team to provide a full specification for your project.
For more information on the Twistfix range of masonry specialist paints, construction fasteners, damp proofing and masonry repair products, please call us directly, chat live with a member of our team online or drop us an email. Hot stuff!
Rising Damp is a 1970s British TV sitcom, starring the inimitable Leonard Rossiter as long-suffering landlord Rigsby and… oh right – you mean THAT rising damp! Sorry. Though the program, which centred around a rather old and shabby house, was not named that for no reason! Although well-known, rising damp is the least common form of damp problem in UK houses. When it does occur however, it poses a serious threat of damaging structural elements such as bricks, mortar, plaster and timber. It should therefore be remedied immediately.
Quite often rising damp can be reversed by simply removing items that are bridging a perfectly operative damp proof course. For example raised patios, raised flower-beds and blocked cavity wall have all been responsible for bridging a DPC and allowing groundwater to be absorbed into the wall at a level above the buried damp course.
Masonry is porous and naturally attracts water, both vapour and liquid, through a process of capillary motion. Ground water drawn into the masonry subsequently evaporates, leaving behind salts and chlorides on the surface which build up over time. Salt also attracts water and so the cycle is established, drawing water higher up each time to around a metre in height, leaving a clear line of demarcation. This line, along with visible salt deposits, is the classic symptom of rising damp, a problem that occurs most often in buildings with an insufficient or non-existent damp proof course
Of course there are many instances where DPC-bridging soil levels cannot be reduced and many more instances where rising damp is caused by a missing or defective damp proof course. The two most common treatments for rising damp are chemical damp proof injection and electro-osmosis damp proofing. Twistfix are expert suppliers of a comprehensive range of both electroosmotic and damp proof injection solutions and are able to advise on which is the best method for the particular property.
Our incredibly popular rising damp injection treatment consistently lives up to its enviable reputation. The injection cream has been specially formulated using an emulsification process to offer professional results every time. Once applied, the BBA Accredited damp injection cream will rapidly migrate through all of the pores in the masonry, forming a strong and effective damp proof course. Wall plaster can then be renewed using either a Twistfix mesh membrane barrier or a plaster additive; inhibiting salt deposits and breaking the damaging rising damp cycle.