ROTAFIX LTD

ROTAFIX HOUSE
HENNOYADD ROAD
ABERCRAF
SWANSEA
GLAMORGAN SA9 1UR

Tel: 01639 730481
Fax: 01639 730858

Company Logo

Suppliers of: Structural Adhesive, Structural Grout, Structural Mortar, Concrete Repair, Crack Filler, Coatings, Sealers, Waterproofing,Timber Repair, Grouts, Floor Screeds, Mortars

Rotafix are manufacturers of Resiwood® construction and structural adhesives, grouts, cements and coating and specialists in the structural repair of timber and masonry.

We provide solutions to simple and complex structural repairs, as well as bonding and coating projects across the globe. We work closely with architects, structural engineers and contractors on heritage and historic buildings as well as on new construction projects.

CE MARKING: RSA, CB10T, EA, Timberset, TG6 and Zeroset T are now all carrying the CE Approvals Marking to ISO:15274

Case Studies: A wide range of informative Case Sudies Click here

Online shop: rotafixonline.co.uk

Main Products Include:

Timber Engineering Products:

Rotafix supply a wide range of Timber Engineering products ideal in order to upgrade timber strength. These include:

Masonry Repair Products:

Rotafix supply a comprehensive range of Masonry Repair Products including mortars, puttys, grouts, primers & floor screeds. These Include:

Coating & Sealers:

Rotafix stock a wide range of coating and sealers suitable for all applications. These include:

Waterproofing Products:

Rotafix supply a range of waterproofing products for floors, basements and underwater applications. These include:

Chemical Anchors:

Rotatfix Supply a wide range of Chemical Anchors to include Adhesives, Grouts and Crack Fillers. These Include:

PyroProtect Fire Retardant Wood Stains & Clear Coatings:

Rotafix are distributors of a unique series of waterborne fire retardant wood stain and clear coatings that can be easily applied by professionals and DIY enthusiasts. These unique formulations can be applied in situ without the requirement of specialist equipment.The Rotafix interior and exterior woodstains and clear coatings have been developed specifically with active ingredients that protect your Timber from pests, moisture, mould and most importantly fire. The fire protection properties are provided by Ferric(III)dihydrogenphosphate (FHP) developed specifically for this woodstain.

Further technical information, image galleries and product specifications are available through the Rotafix website or via the BPi Download Library.

These files are provided by the manufacturer. While Building Products Index takes every care to ensure the information is correct and up to date, we cannot be held liable for any out of date or incorrect information in them. Please check with the supplier before specifying or purchasing products.

1 - Rotafix Product Catalogue
Rotafix Damp Proofing and Sealers, adhesives, concrete repair structural adhesives

Published [16/08/19]File size [1224 KB]

2 - Rotafix PyroProtect Coatings Brochure
Rotafix Fire retardant wood stains and clear coatings

Published [16/08/19]File size [550 KB]

3. Rotafix Timber Resin Splice Brochure
Purpose Made Preformed Timber Repair Units

Published [16/08/19]File size [1249 KB]

4 - Rotafix CB10T Adhesive datasheet
Rotafix CB10T Adhesive is a fast setting 2-part thixotropic epoxy adhesive used for bonding in rods or plates where speed is of the essence.

Published [16/04/18]File size [134 KB]

9 - Rotafix Structural Adhesive (RSA) Slowset Datasheet
Rotafix Structural Adhesive (RSA) is a pumpable 2-part thixotropic system that forms a high strength epoxy adhesive. This slow setting epoxy is ideal for injecting and pumping into blind holes, side slots, cracks and fissures.

Published [16/04/18]File size [166 KB]

9a - Rotafix Aquachem Epoxy Coating Datasheet
Aquachem® is a 2-component water based epoxy coating system suitable for a variety of applications and substrates

Published [16/04/18]File size [134 KB]

9a - TG6 Structural Grout Datasheet
timber engineering grout, structural repairs timber, filler, epoxy filler, repair wood Structural Adhesive Structural Adhesives CE Marking ISO15274 ISO:15274

Published [07/07/16]File size [98 KB]

9c - Rendacrete Industrial Floor Screed
INDUSTRIAL FLOOR SCREED

Published [07/07/16]File size [134 KB]

9c - Rendacrete LW Datasheet
light weight, low slump, cementitious repair, concrete industrial floor screed

Published [07/07/16]File size [42 KB]

9c - Resiwood Timberset Structural Adhesive Datasheet
Rotafix Timberset Adhesive is a 2-part thixotropic epoxy adhesive used where the moisture content of the timber does not exceed 20% and where the timber is expected to remain in moist conditions as a result of exposure to the elements.

Published [16/04/18]File size [134 KB]

Borotreat 10P Datasheet
boron, timber preservation, timber protection, dry rot prevention, woodworm prevention

Published [07/07/16]File size [29 KB]

CFRP Plate Datasheet
carbon fibre reinforcement, structural repairs, timber engineering, joints in timber

Published [07/07/16]File size [68 KB]

Chemflor CR Grey Datasheet
floor coating, protective coating, floor primer, heavy duty floor sealer, timber floors, concrete

Published [07/07/16]File size [89 KB]

Consolidating liquid slow set Datasheet
slow setting, 2 component epoxy liquid, low viscosity slow setting epoxy grout, consolidation of frazz, damaged timber, consolidation of damaged concrete

Published [07/07/16]File size [38 KB]

GFRP Plate Datasheet
Glass fibre reinforcement, structural repairs, timber engineering, joints in timber

Published [07/07/16]File size [30 KB]

Resiwood TM3 Moulding Mortar Datasheet
Timber Repair mortar, cosmetic repair, window frame repair, window putty, machinable filler, wood filler

Published [07/07/16]File size [50 KB]

RM20 Light Weight Concrete Repair Mortar Datasheet
light weight, low slump, Epoxy Resin cementitious repair, concrete.

Published [07/07/16]File size [100 KB]

Rotafix ACS Boron Rods Data Sheet
boron, timber preservation, timber protection, wood preservatives

Published [16/08/19]File size [1909 KB]

Rotafix Cembond Grout Data Sheet
cement based grout, lateral restraints, crack repair, pointing bed joints, helifix repairs, spriotie repairs

Published [16/08/19]File size [41 KB]

Rotafix Chemflor Clear Coatings

Published [16/08/19]File size [37 KB]

Rotafix Engineering Adhesive New
Rotafix Engineering Adhesive (EA) is a pumpable 2-part thixotropic epoxy adhesive similar to RSA in consistency, but modified to further increase the modulus of the cured adhesive.

Published [15/08/19]File size [1016 KB]

Rotafix EP3 Grout Data Sheet
anchor grout, bedding compound, self levelling, grout, under bed, civil engineering structural grout

Published [16/08/19]File size [39 KB]

Rotafix HA Slurry Primer Data Sheet
acrylic powder modified cement based coating, protect steel reinforcing, water soluble fast setting primer, chemical resistant, corrosion resistant. Corrosion protection for steel reinforcement

Published [16/08/19]File size [22 KB]

Rotafix HM PU Sealant Datasheet
Sealant, PU, polyurethane, high modulus sealant, gap filler

Published [07/07/16]File size [57 KB]

Rotafix Lamset Liquid Datasheet
Solvent Free Epoxy Adhesive Timber Laminating

Published [07/07/16]File size [37 KB]

Rotafix PyroProtect Product Data
Fire Retardant Wood Stains

Published [16/08/19]File size [84 KB]

Rotafix Structural Adhesive
Structural Adhesive

Published [15/08/19]File size [194 KB]

Rotafix Structural Adhesive RSA400cc
Structural Adhesive, timber adhesive, epoxy adhesive, timber engineering, wood adhesive, slow setting

Published [07/07/16]File size [48 KB]

Rotafix Superfluid Grout
Structural grout

Published [15/08/19]File size [30 KB]

Rotafix TG6 Timber Grout Oct 2015
Timber Grout is a three component pourable epoxy grout

Published [15/08/19]File size [1012 KB]

Rotafix Vinachem Coatings
aqueous polymer solution of fine acrylic particle

Published [16/08/19]File size [87 KB]

Rotafix Vinachem is an Aqueous Polymer Solution
water proofer, thomson water sealer, micropore coating,water repellent

Published [07/07/16]File size [87 KB]

Rotafix Zeroset Anchor Grout Datasheet
Zeroset Anchor Grout is a 2-part high strength epoxy system which is used for fixing metallic objects into concrete. Zeroset Anchor Grout has been specifically designed for setting at low temperatures in smooth walled diamond drilled holes.

Published [15/08/19]File size [380 KB]

Stone Repair Putty Datasheet
epoxy repair mortar, cementitious repairs, stone carving repair, mouldable mortar, moulding mortar

Published [07/07/16]File size [31 KB]

ADHESIVES . .
ADHESIVES BY COMPOSITION Crack Filling .
ADHESIVES BY COMPOSITION Epoxy Cartridge .
ADHESIVES BY COMPOSITION Epoxy Flexible .
ADHESIVES BY COMPOSITION Epoxy Low Viscousity .
ADHESIVES BY COMPOSITION Epoxy Non-Tainting .
ADHESIVES BY COMPOSITION Epoxy Paste .
ADHESIVES BY COMPOSITION Epoxy Resin .
ADHESIVES BY COMPOSITION Epoxy Solvent Free .
ADHESIVES BY COMPOSITION Epoxy Thixotropic .
ADHESIVES BY COMPOSITION Epoxy Toughened .
ADHESIVES BY COMPOSITION Epoxy Two Part .
ADHESIVES BY COMPOSITION Epoxy Two Part Rapid Curing .
ADHESIVES BY COMPOSITION Fast Setting/Quick Setting/Rapid Setting .
ADHESIVES BY COMPOSITION Fire Rated .
ADHESIVES BY COMPOSITION Flexible .
ADHESIVES BY COMPOSITION Formable .
ADHESIVES BY COMPOSITION Gap Filling .
ADHESIVES BY COMPOSITION Paintable .
ADHESIVES BY COMPOSITION Stainable .
ADHESIVES BY COMPOSITION Structural Adhesives .
ADHESIVES BY COMPOSITION Structural Adhesives CE Marked ISO15274
ADHESIVES BY COMPOSITION Structural Adhesives Epoxy
ADHESIVES FOR DIFFERENT PRODUCTS Aluminium .
ADHESIVES FOR DIFFERENT PRODUCTS Anchoring Anchor Bonding
ADHESIVES FOR DIFFERENT PRODUCTS Brick .
ADHESIVES FOR DIFFERENT PRODUCTS Concrete .
ADHESIVES FOR DIFFERENT PRODUCTS Concrete Engineering .
ADHESIVES FOR DIFFERENT PRODUCTS Concrete Engineering CE Marked ISO15274
ADHESIVES FOR DIFFERENT PRODUCTS Concrete Plate Bonding .
ADHESIVES FOR DIFFERENT PRODUCTS Epoxy Coated High Yield Rebars to Timber .
ADHESIVES FOR DIFFERENT PRODUCTS Epoxy Glass Rods to Timber .
ADHESIVES FOR DIFFERENT PRODUCTS GFRP / CFRP Fibre Rods and Plates to Timber .
ADHESIVES FOR DIFFERENT PRODUCTS Glass .
ADHESIVES FOR DIFFERENT PRODUCTS Glulam Structure Upgrading .
ADHESIVES FOR DIFFERENT PRODUCTS Iron .
ADHESIVES FOR DIFFERENT PRODUCTS Laminating Applications .
ADHESIVES FOR DIFFERENT PRODUCTS Masonry Engineering CE Marked ISO15274
ADHESIVES FOR DIFFERENT PRODUCTS Masonry Stitching .
ADHESIVES FOR DIFFERENT PRODUCTS Metals .
ADHESIVES FOR DIFFERENT PRODUCTS Natural Stone .
ADHESIVES FOR DIFFERENT PRODUCTS Rubber .
ADHESIVES FOR DIFFERENT PRODUCTS Steel .
ADHESIVES FOR DIFFERENT PRODUCTS Structural Injectable .
ADHESIVES FOR DIFFERENT PRODUCTS Structural Timber .
ADHESIVES FOR DIFFERENT PRODUCTS Timber Construction .
ADHESIVES FOR DIFFERENT PRODUCTS Timber Crack Injection .
ADHESIVES FOR DIFFERENT PRODUCTS Timber Engineering .
ADHESIVES FOR DIFFERENT PRODUCTS Timber Engineering CE Marked ISO15274
ADHESIVES FOR DIFFERENT PRODUCTS Timber Greenheart Timber .
ADHESIVES FOR DIFFERENT PRODUCTS Timber Laminating .
ADHESIVES FOR DIFFERENT PRODUCTS Timber Plate Bonding .
ADHESIVES FOR DIFFERENT PRODUCTS Void Filling .
ADHESIVES FOR DIFFERENT PRODUCTS Wood .
ADHESIVES FOR DIFFERENT PRODUCTS Wood Exterior
ADHESIVES FOR SPECIAL ENVIRONMENTS High Humidity .
ADHESIVES FOR SPECIAL ENVIRONMENTS Variable Temperature .
ANCHORS Chemical Anchoring .
ANCHORS Chemical Anchoring Epoxy Resin Highways Standards SA1 Approved
ANCHORS Chemical Anchoring Epoxy Resin Two Part
ANTI-SKID COATINGS Skid Resistant Coatings .
ANTI-SKID SURFACING Skid Resistant Surfacing .
BONDING AGENTS Concrete .
BONDING AGENTS Epoxy Resin Based .
BONDING AGENTS Fast Setting/Quick Setting/Rapid Setting .
BONDING AGENTS Gap Filling .
BONDING AGENTS Glass .
BONDING AGENTS Masonry .
BONDING AGENTS Metal .
BONDING AGENTS Timber .
BONDING AGENTS Timber to GFRP and CFRP Plates and Rods .
BONDING AGENTS Wood .
BRICK Sealers .
BRICK Sealers Polymer Barrier
COATINGS Abrasion Resistant .
COATINGS Anti-Skid Skid Resistant .
COATINGS Epoxy .
COATINGS Epoxy Chemical Resistant
COATINGS Epoxy Coloured
COATINGS Epoxy Non-Tainting
COATINGS Epoxy Potable Water
COATINGS Epoxy Slip Resistant/Anti-Slip/Low Slip
COATINGS Epoxy Solvent Free
COATINGS Epoxy Water Dispersed
COATINGS Fire Retardant Decorative
COATINGS Fire Retardant Euroclass B
COATINGS Hygienic .
COATINGS Hygienic Food Processing Areas
COATINGS Integral Biocide .
COATINGS Internal .
COATINGS Potable Water Applications .
COATINGS Swimming Pool .
COATINGS Water Repellent .
COATINGS Water Retaining Structures BS 6920
COATINGS Water Retaining Structures Non-Toxic
COATINGS Wood .
COATINGS Wood Fire Retardant Euroclass B
CONCRETE Sealers .
CONCRETE: APPL. AFTER CONCRETE HAS CURED Floor Sealers .
CONCRETE: APPL. AFTER CONCRETE HAS CURED Repairing Cement / Repairing Mortar .
CONCRETE: APPL. AFTER CONCRETE HAS CURED Repairing Compounds .
CONCRETE: APPL. AFTER CONCRETE HAS CURED Repairing Compounds Overhead Surface
CONCRETE: APPL. AFTER CONCRETE HAS CURED Repairing Compounds Potable Water
CONCRETE: APPL. AFTER CONCRETE HAS CURED Repairing Compounds Potable Water BS 6920
CONCRETE: APPL. AFTER CONCRETE HAS CURED Repairing Compounds Vertical Surface
CONCRETE: APPL. AFTER CONCRETE HAS CURED Sealers .
CONCRETE: APPL. AFTER CONCRETE HAS CURED Sealers Epoxy Resin
CONCRETE: APPL. AFTER CONCRETE HAS CURED Sealers Polymer Barrier
DAMP PROOFING Solutions Surface
DAMPCOURSES Liquid Applied .
FILLERS Masonry Repair .
FILLERS Timber Repair .
FILLERS Wood .
FILLERS Wood Epoxy Paste Moldable Mortar
FLOOR COATINGS Anti-Skid Skid Resistant .
FLOOR COATINGS Epoxy Resin .
FLOOR COATINGS Epoxy Resin Coloured
FLOOR COATINGS Epoxy Resin Non-Tainting
FLOOR COATINGS Epoxy Resin Slip Resistant
FLOOR COATINGS Epoxy Resin Solvent Free
FLOOR COATINGS Hygienic .
FLOOR COATINGS Industrial .
FLOOR COATINGS Sealers .
FLOOR COATINGS Slip Resistant/Anti-Slip/Low Slip .
FLOOR COATINGS Slip Resistant/Anti-Slip/Low Slip Industrial
FLOOR SCREED Repairing Compounds .
FLOOR SCREEDS Cementitious .
FLOOR SCREEDS Fibre Reinforced .
FLOOR SCREEDS Industrial Cementitious Base .
FLOOR SCREEDS Industrial Premixed .
FLOOR SCREEDS Polymer Modified .
FLOOR SCREEDS Readymixed .
FLOOR SCREEDS Self-Levelling Self-Smoothing .
GROUTS Anchoring .
GROUTS Anchoring DoT Standards for Highways SA 1 Approved
GROUTS Anchoring Epoxy Resin Two Part
GROUTS Bearing Baseplates .
GROUTS Bridge Bearing .
GROUTS Cementitious .
GROUTS Civil Engineering Applications .
GROUTS Concrete Repair .
GROUTS Epoxy Resin .
GROUTS Epoxy Resin Fire Resistant Certificate 1987
GROUTS Injection .
GROUTS Machinery Bedding .
GROUTS Non-Shrink .
GROUTS Resin Anchor .
GROUTS Structural .
GROUTS Structural Epoxy Resin Repair of Structural Timber
GROUTS Structural Timber Beam Reinstatement
GROUTS Structural Timber Repair CE Marked ISO15274
GROUTS Structural Void Filling
GROUTS Thixotropic Shrink-Compensated .
GROUTS Timber Strengthening Consolidation of Friable or Damaged Timber
MASONRY Biocides Biocidal Solutions .
MASONRY Repair Systems .
MASONRY Sealers Polymer Barrier
MASONRY Sealers / Stabilisers .
MEMBRANES LIQUID APPLIED Epoxy Resin DPM .
MEMBRANES LIQUID APPLIED Epoxy Solvent Free .
MEMBRANES LIQUID APPLIED Tanking .
MEMBRANES LIQUID APPLIED Tanking Potable Water
MORTARS Chloride Free .
MORTARS Concrete Repair .
MORTARS Concrete Repair Colour Matched / Colour Matching
MORTARS Concrete Repair High Build
MORTARS Concrete Repair Potable Water WRC Approved
MORTARS Epoxy .
PRIMERS For Concrete Reinforcement Corrosion Protection .
PRIMERS For Steel Reinforcement .
PRIMERS For Steel Reinforcement Corrosion Inhibiting
PRIMERS: TYPES Epoxy Resin Potable Water BS 6920
PRIMERS: TYPES Epoxy Resin Potable Water WRc Approved
PRIMERS: TYPES Epoxy Resin Two Part
PRIMERS: TYPES Slurry .
PRIMERS: TYPES Tack Coat .
PUTTY HARDENING Stone Repair Moldable Moulding Mortar
PUTTY HARDENING Wood Repair Moldable Moulding Mortar
SEALANTS Mastic: by Composition: Polyurethane
SEALANTS Mastic: by Composition: Polyurethane High Modulus
SEALANTS Mastic: by Composition: Polyurethane ISO 11600 F-25M
SEALANTS Mastic: by Special Function: Brick
SEALANTS Mastic: by Special Function: Construction Joint
SEALANTS Mastic: by Special Function: Expansion Movement Joint
SEALANTS Mastic: by Special Function: External
SEALANTS Mastic: by Special Function: Flooring Joints
SEALANTS Mastic: by Special Function: Industrial Floors
SEALANTS Mastic: by Special Function: Internal
SEALANTS Mastic: by Special Function: Metal Constructions
SEALANTS Mastic: by Special Function: Non-Staining
SEALANTS Mastic: by Special Function: Swimming Pool Surround
SEALANTS Mastic: by Special Function: UV Resistant
SEALANTS Mastic: by Special Function: Waterproof
SEALERS For Concrete Floors .
SEALERS For Epoxy Floor Screeds Epoxy Resin
SEALERS For Stone .
SEALERS For Timber Floors .
SEALERS For Timber Floors Epoxy Resin
STONE Repairing Materials .
STONE Sealers .
TANKING Systems .
TANKING Systems Remedial Treatments
TANKING Systems Waterproofing Membranes
TIMBER CONNECTORS . .
TIMBER CONNECTORS Carbon Fibre Reinforced Polymer (CFRP) Plates .
TIMBER CONNECTORS Carbon Fibre Reinforced Polymer (CFRP) Plates Shear Connectors/Reinforcement for Timber Joints
TIMBER CONNECTORS Composite Glassfibre Reinforced Polymer (GFRP) Rods .
TIMBER CONNECTORS Composite Glassfibre Reinforced Polymer (GFRP) Rods Shear Connectors/Reinforcement for Timber Joints
TIMBER CONNECTORS Timber Engineering Connectors .
TIMBER REPAIR Glulam Beams .
TIMBER REPAIR Moldable Moulding Mortar Epoxy Resin Paste
TIMBER REPAIR Plates Carbon Fibre Reinforced Polymer (CFRP)
TIMBER REPAIR Plates Composite Glassfibre Reinforced Polymer (GFRP)
TIMBER REPAIR Plates Timber Strengthening and Upgrading
TIMBER REPAIR Rods Composite Glassfibre Reinforced Polymer (GFRP)
TIMBER REPAIR Strips Composite Glassfibre Reinforced Polymer (GFRP)
TIMBER REPAIR Structural Repair Systems .
TIMBER REPAIR Structural Repair Systems Preformed Timber Resin Splice Units
TIMBER REPAIR Structural Repair Systems Timber Reinforcement
TIMBER REPAIR Structural Repair Systems Timber Restoration
TIMBER TREATMENT Death Watch Beetle .Wood Boring Insects
TIMBER TREATMENT Dry Rot Treatments .
TIMBER TREATMENT Dry Rot/Insect Attack/Fungicidal Combined .
TIMBER TREATMENT Fire Retardant Euroclass B Rating
TIMBER TREATMENT For Constructional Timber .
TIMBER TREATMENT For Staircases .
TIMBER TREATMENT Fungicidal Treatments .
TIMBER TREATMENT Woodworm Treatments .
WATER REPELLENT LIQUIDS Aqueous Polymer/Acrylic .
WATER REPELLENT LIQUIDS Brickwork .
WATER REPELLENT LIQUIDS Clear .
WATER REPELLENT LIQUIDS Concrete .
WATER REPELLENT LIQUIDS Masonry .
WATER REPELLENT LIQUIDS Timber .
WATERPROOFING LIQUIDS Clear .
WATERPROOFING LIQUIDS Polymer Modified .
WOOD PRESERVATIVES Rods Boron Rods Boric Acid
WOOD PRESERVATIVES Surface Treatments Boric Acid Insect and Fungal Attack Prevention
WOODSTAINS . .
WOODSTAINS Biocidal .
WOODSTAINS Exterior .
WOODSTAINS Fire Retardant Euroclass B
WOODSTAINS Solvent Free .
WOODSTAINS VOC Volatile 2010 Limit Compliant .
WOODSTAINS Waterborne .
WOODWORM Solutions .
WOODWORM Treatments .
AQUACHEM Epoxy Coatings
PYROPROTECT Fire Retardant Wood Stains
RENDACRETE Concrete Repair Mortar
RESIWOOD Timber Repair
TIMBERSET Structural Adhesives
TM3 MOULDING MORTAR Timber Repair
VINACHEM Polymer Sealers
ZEROSET Anchor Grouts

CE marking for Structural Adhesives compliant to ISO15274.

April 2017

Rotafix are pleased to announce that following a thorough review by SGS, that Rotafix Structural Adhesive(RSA), Engineering Adhesive (EA), Timberset Structural Adhesive, CB10T Structural Adhesive and TG6 Timber Grout now carry the CE marking for Structural Adhesives compliant to ISO15274.

Achieving this standard requires thorough independent UKAS approved laboratory testing, for each of the products and a well-documented factory control system that gives consistent assurance that product manufactured by Rotafix will have definitive performance characteristics.

Rotafix products are developed and manufactured in the UK, but are distributed to North America, Asia and Europe primarily for the construction and restoration of timber buildings and structures where Architects, Structural Engineers and Construction professionals are looking for the reassurance of using a controlled product that will give a defined set of performance characteristics.

Having the CE mark will allow Rotafix to trade with European Companies but also give assurances to Asia and North America that ISO standards underpin the testing of the products.

Chethams Library Beam Strength Upgrade using Carbon Fibre and TG6

April 2017

Chethams Library Beam Strength Upgrade using Carbon Fibre and TG6

This case study shows a challenging repair to an oak beam using angled slots, carbon fibre and TG6 timber grout.

Chetham’s Library, which was founded in 1653, is the oldest surviving public library in Britain. The building that houses Chetham’s is even older than the foundation of the School and Library. It was built in 1421 to accommodate a college of priests and remains one of the most complete medieval complexes to survive in the north west of England. The beautiful old sandstone buildings house a magnificent Library.

The Audit Room was one of the rooms allocated to the warden of the medieval college, this is one of the most richly appointed in the building. The most notable decorative feature is the timber ceiling, divided into nine panels by moulded ribs decorated with bosses including some with grotesque designs and an impressive Mouth of Hell mask with a sinner ensnared in its jaws. Each panel is divided by diagonal ribs. The design is consistent with a date from the first half of the fifteenth century, and there are some similarities with the panels in the roof of the Cathedral.

Rotafix were approached by Alan Jackson of David Walker Design for assistance in designing a reinforcing solution for the carved oak beams that support and adorn the ceilings in the Audit Room.

One of the oak beams had failed under loading as the integrity of the beam was compromised by infestation and decay. A number of attempts have been made to repair, strengthen and reinforce the beam. The first of these was an iron pin that had been inserted into the beam from the underside in approximately 1650 that would have pulled the beam back together. Between the Wars, steel reinforcing plates were screwed to either side of the beam to add reinforcement.

Rotafix determined that the integrity of the beam should be restored using Rotafix TG6 Structural Grout and that it should be strengthened by inserting Rotaflex carbon fibre plates as close to the tension zone as possible. English Heritage insisted that the repair should be invisible and not disturb the repairs that had been attempted previously.

Rotafix approached Simon Chen of TRAC Structural, a company with extensive experience in using Rotafix methods in historic buildings. Rotafix worked with TRAC Structural to develop a practical approach to make the recommended repair.

Rotafix and TRAC Structural developed a method statement and created sketches that were approved by the Trustees of Chatham Library and English Heritage where slots would be cut into the top side of the beams. The slots would be angled to avoid the coach screws of the plate repair and stop short of touching the iron pin inserted in the centre line of the beam.

TRAC Structural cut slots using a chainsaw controlled by a jig that was attached to the beam at the exact angle required.

Rotaflex Carbon fibre plates were inserted into the slots and then filled with Rotafix TG6 Structural Grout. The grout cured overnight strengthening and reinforcing the beam. Thirteen tubs of grout, each containing 7.5 litres, were used to complete the job.

The TG6 Structural Grout filled the voids consolidating the timber and acts as the adherent between the timber and the Rotaflex carbon fibre plate. Rotafix TG6 Structural Grout is a two part epoxy heavily filled with fine silica fillers. The fillers add excellent compressive strength of the grout so any areas of the beam working under compressive loads are given additional reinforcing.

The Rotaflex carbon fibre is excellent in tension and is ideal in this application as it is only 2mm thick and would require a glue line of 2-4mm on either side of the plate, this minimises the timber removal from the beam. A 2mm thick carbon fibre plate has a tensile strength of 160,000 N/ mm2. So this would be a significant increase in strength for the beam.

Hiding the carbon fibre internally ensured that the beam did not lose its aesthetic appearance and would be invisible when compared to the other beams in the library from the underside.

Rotafix are able to provide comprehensive technical support for architects, structural engineers and contractors carrying out repairs to historic buildings and features.

For further information about products used in this project or any queries with respect to structural adhesives and on-site bonding please contact us on +44 (0)1639 730481 where one of our technical team will be happy to assist.

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