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ISOVER Spacesaver Wool Insulation Roll 150 x 1160 x 8050mm (9.34m2)
Manufactured from up to 75% recycled glass, these ISOVER Spacesaver glass mineral wool rolls are supplied in a range of thicknesses from 100-200mm. The economical and easy-to-install insulation rolls are suitable for loft insulation, where they are... -
Unilin Thin-R Pitched Roof Insulation PIR Board 2400 x 1200 x 150mm
Unilin / Xtratherm XT Thermal Liner MF Insulation PIR Board is a composite insulated panel of Unilin / Xtratherm PIR insulation core with a composite foil facing bonded to 12.5mm tapered edge plasterboard for internal walls, sloped roofs and ceilings... -
ISOVER Slab 32 Cavity Wall Insulation 150 x 455 x 1200mm (2.18m2)
ISOVER Cavity Wall Slab (CWS) 32 is a glass mineral wool slab that is made from 75% recycled glass. Cavity Slab 32 offers exceptional thermal performance in external masonry cavity walls, with a thermal conductivity of 0.032 W/m.K. hence the name Slab 32... -
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ISOVER Cavity Wall Slab 34 Insulation 1200 x 455 x 150mm (3.28m2)
Quick and easy to install the ISOVER Cavity Wall Slab (CWS) 34 features strong, resilient, and flexible mineral wool slabs that are 455mm wide, to fit between standard wall tie spacing, saving you time and hassle on your project. Cavity Wall Slabs can be... -
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ISOVER RD Party Wall Insulation Roll 150 x (2 x 455) x 4000mm (3.64m2)
You can save time and money when using the ISOVER RD Party Wall roll as part of a proprietary Robust Detail construction. Choosing this method removes the need for parge coats or wet plastering, as well as the need for costly pre-completion sound testing... -
Unilin CavityTherm Full Fill Cavity Tray Insulation PIR Board 1200 x 350 x 150mm
The Cavitytherm Full Fill Channel is an insulated channel to allow for insulation continuity around stepped cavity trays at gable junctions. -
Unilin CavityTherm Full Fill Ext Corner Insulation PIR Board 1200 x 450 x 150mm
CavityTherm Corner Fill is a preformed panel of CavityTherm that folds to provide a 90° corner either external or internal. Corner boards ensure excellent detailing and provide a template for setting out of outer brickwork. -
Unilin CavityTherm Full Fill Insulation PIR Board 1200 x 450 x 150mm
CavityTherm is an innovative built-in insulation for traditional walls that achieves passive level U-Values as low as 0.12 W/m2K with excellent thermal bridging detailing in cavities less than 150mm wide. The board includes specifically designed rebated... -
Unilin CavityTherm Full Fill Int Corner Insulation PIR Board 1200 x 450 x 150mm
CavityTherm Corner Fill is a preformed panel of CavityTherm that folds to provide a 90° corner either external or internal. Corner boards ensure excellent detailing and provide a template for setting out of outer brickwork. -
Unilin CavityTherm Full Fill Riser Insulation PIR Panel 1200 x 225 x 150mm
The CavityTherm half board allows you to position your insulation at floor levels and positions it directly under the Decks Post-Insulation-Riser (DIP). The CavityTherm can be used on individual floors as well as shared walls, thereby increasing thermal... -
Unilin CavityTherm Full Fill Top Insulation PIR Panel 1200 x 225 x 150mm
A CavityTherm half-board that is used to finish wall insulation heights when a full board is not required. Uses less materials and generates less waste than traditional methods. -
Unilin CavityTherm150 Hockey Service V Insulation PIR Board 1200 x 75 x 150mm
Hockey Service voids allows for easy access to the cable that supplies the meter box and is preformed to fit the insulation. It has a frost line of 28mm, with an R value of 6.9m2k/w -
Unilin CavityTherm150 Meter Box Insulation PIR Panel 1200 x 600 x 150mm
The preformed meter box accessory allows a recess space for placement of meter box, leaving the insulation to run in a continuous plane. The CavityTherm150 Meter Box Preform is based on the CavityTherm140 but with a tighter specification for more precise... -
Unilin ECO CavityTherm External Corner Insulation PIR Board 1200 x 450 x 150mm
An engineered system providing added resilience against increases in wind-driven rain resulting from climate change. CavityTherm 360 is a bio-enhanced high performance composite board of enhanced PIR with a Lambda value as low as 0.020 W/mK for full fill... -
Unilin ECO CavityTherm Full Fill Insulation PIR Board 1200 x 450 x 150mm
Our CavityTherm 360 system is a bio-enhanced high performance composite board of enhanced PIR with a Lambda value as low as 0.020 W/mK for full fill cavity wall applications. When built into a traditional 110-150mm cavity using standard foundation... -
Unilin ECO Multi Application Insulation PIR Board 2400 x 1200 x 150mm
Unilin / Xtratherm ECO360 multi application insulation PIR board is a bio-enhanced, superior performance PIR insulation suitable for solid and suspended floors. ECO360 MA for floors offers excellent insulation performance with thermal conductivity of 0... -
Unilin Thin-R Flat Roof ALU Single Ply Insulation PIR Board 2400 x 1200 x 150mm
Unilin / Xtratherm FR/ALU is a high performance Polyisocyanurate flat roof insulation with vapour-tight aluminium foil facings suitable for use with single ply membranes. Designed to fit and seal the full range of single ply roofing systems. The unique... -
Unilin Thin-R Flat Roof BGM Insulation PIR Board 1200 x 600 x 150mm
Unilin / Xtratherm ThinR Flat Roof BGM Insulation PIR Board is ideal for use with partially bonded, torched-on and built-up bituminous felt systems. Built-up Bituminous Felt (BGF) is faced with a polypropylene fleece finished bitumen/glass fibre working... -
Unilin Thin-R Flat Roof MG Single Ply Insulation PIR Board 1200 x 600 x 150mm
Unilin / Xtratherm TR/MG is a high performance Polyisocyanurate with mineral coated glass facers suitable for use below single ply fully adhered roof membranes, single ply waterproofing systems and partially bonded built-up felt. Especially suited in... -
Unilin Thin-R Plus Hyfloor Insulation PIR Board T&G 2400 x 1200 x 150mm
An unbeatable choice in all thermal insulation, Hyfloor (T&G) has a superior thickness to performance ratio allowing the lower targets required under Building Regulations. XT/HYF (T&G) tongue and groove jointing offers a practical on-site solution that...
Insulation
Insulation is an effective way to save energy in your home or property, as it helps to prevent draughts as well as energy from depleting out of the building, ultimately wasting money. Insulating your loft or attic is a simple and effective way to reduce heat loss and reduce your overall heating bill. Loft insulation is effective for at least 40 years.
Whilst saving energy is the most common incentive for home and property owners, there are many other reasons as to why you might want to install insulation. Insulation can prevent sound from travelling either around your home or between you and neighbouring houses. Good insulation also helps to prevent mould and condensation from appearing in your home, which is often caused by the differing temperatures of your internal and external walls. Insulation can also form part of your home’s resistance against the quick spread of fire.
There are a variety of different insulation products that we offer at Howarth and knowing which one to purchase will be determined by where you wish to use it and what you want to achieve from it, such as:
Glass wool, which is suitable for lofts and a variety of walls. Glass wool is manufactured from recycled glass, and it is not combustible, so it is ideal for offering both acoustic and thermal performance, as well as being water-resistant. It can also act as a cavity wall insulation, which means that it will trap the air in the insulation material that has been injected into the cavity. The clever use of materials helps trap warm air and prevent air circulating. As a result, heat loss is prevented using conduction and convection.
PIR boards are a rigid insulation board that can be used in walls, flooring, and lofts.
Polystyrene is ideal for walls, flooring and under concrete. It offers an excellent thermal insulator property as an insulation board, and it is also very easy to work with.
Rockwool is a stone-based insulation, which is suitable for cavities, partitions, and external walls, as well as floors and lofts.Pipe insulation is used to insulate all hot and cold-water pipes, including radiators and boiler systems. These are designed to prevent pipes from freezing during the cooler months.
For further information and expert advice about insulation, please contact your friendly local Howarth branch.
Frequently Asked Questions
How to guides
Insulation for every application
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Celotex Insulation
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Isover Insulation
Isover Insulation - Learn more about Isover and their types of insulation boards.



