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Moisture Resistant Insulation

Resistance to moisture combined with the ability of the total component to dry is an important consideration. The moisture resistant insulation come in the form of polystyrene boards, EPS and XPS, Calcium Silicate boards, Composite boards with moisture protective sheathing, Gypsum boards with glass fibre and additives and thermoplastic sheathing.

Everyday activities such as cooking, washing and bathing add moisture to the air in your home in the form of water vapour. This vapour can become trapped inside walls, resulting in mould and mildew growth, which can damage your home and present a potential health concern. Insulation provides a barrier between vapour and structure.

Types of Moisture-Resistant Insulation
  • Foam or closed-cell rigid insulation--extruded polystyrene or polyisocyanurate--is not damaged by water and resists surface mould growth. This kind of insulation generally allows the walls and floors to drain and dry.
  • Fibreglass insulation resists water damage and surface mould growth, however, this type of insulation may trap and hold water and slow drying time of walls and floors. Soaked fibreglass insulation usually has to be removed.
  • Fibre reinforced calcium silicate board with water repellent silicone applied on both faces. 
  • Reinforced with glass fibre gypsum board with the glass fibre tissue immediately below each surface of the board. Also Gypsum plasterboard with an aerated gypsum core with water repellent additives encased in and firmly bonded strong  paper liners.
  • Cement based boards with cellulose, sand and selected water repellent additives.
  • Laminated boards with an aerated gypsum core and PIR insulation lined with multi-layer vapour control barrier on both sides.
  • Laminated XPS foam with a polymer-concrete coating on both sides and reinforced with a fibreglass mesh encased by carbon nano-fibres.
Practically all moisture resistant boards available at Insulation Shop are also fire resistant, except the XPS boards.

Installation
You can install moisture resistant insulation boards just like you you install standard drywall boards.
  • Cut the pieces to size using a sharp utility knife and a metal straight-edge. Simply secure the straight-edge in place and score through the outer coating using a sharp blade. Once the paper is scored you can snap the board off changing its overall size to what you need. 
  • Drive the fixing screws into the board and the studs behind it or to the battens fixed on to the solid substrate. Take care to only go just below the surface of the board and try to avoid going through the paper facing entirely.
  • If you have to go with multiple rows of board on a wall, stagger the material to keep seams from lining up.
  • Avoid putting water resistant drywall on your bathroom ceiling, as bathroom ceilings tend to collect a great deal of moisture.
  • Tape the joints and plaster them.
  • You can then install tiles on the boards or just finish them with plaster and paint.

Filter by MANUFACTURER (show)

0.5mm Plysolene PIB Thermoplastic Sheeting 1m x 25m
Guide Price
Brand: Plysolene Model and Size: 1x25m - 25m2
Delivery Time: 2 - 4 days
0.5mm Plysolene PIB Thermoplastic Sheeting  is one of the top selling products in the UK with over 40 years long tradition in power stations, oil refineries, airports and chemical works. It is specially designed to provide waterproof wrapping for pipe work and ventilation duct work, manufacture..
Guide Price: £228.24
£273.89 inc VAT
10mm Siniat BluClad Board
Guide Price
Brand: Siniat Model and Size: 2400x1200mm - 2.88.m2
Delivery Time: 2 - 4 days
Siniat BluClad is a medium density fibre reinforced calcium silicate board which has been formulated without inorganic fibre. Available in a standard 10mm thickness, it is off-white in colour and has a smooth surface on the front face and textured on the reverse. The smooth face is for painting and ..
Guide Price: £75.46
£90.55 inc VAT
12.5mm British Gypsum Glasroc H Tilebacker Square Edge
Guide Price
Brand: British Gypsum Model and Size: 1200x2400 - 2.88m2
Delivery Time: 1 - 2 days
12.5mm Glasroc H TILEBACKER is a high performance board specifically designed for use in wet areas such as bathrooms and kitchens. High levels of moisture and mould resistance, combined with superior dimensional stability make it the high performance alternative to plywood and cement boards reducing..
Guide Price: £48.63
£58.36 inc VAT
12.5mm British Gypsum Glasroc X Sheathing Board - 1200mm x 2400mm
Guide Price
Brand: British Gypsum Model and Size: 1200x2400 - 2.88m2
Delivery Time: 1 - 2 days
12.5mm Glasroc X Sheathing Board is a high performance sheathing board that gives BBA certified 6 months weather protection. These boards are used to provide temporary weather protection for structural frame steel constructions, where the facade cladding system is fixed through it into the stee..
Guide Price: £35.56
£42.67 inc VAT
12.5mm Gyproc FireLine MR Plasterboard 1200mm x 3000 mm
Guide Price
Brand: British Gypsum Model and Size: 1200x3000mm - 3.60m2
Delivery Time: 2 - 3 days
12.5mm Gyproc FireLine MR with water repellent additives in its core is used in British Gypsum wall lining and partition systems where both fire protection and moisture resistance are required. Also used for protection to structural steel. Plasterboard linings provide good fire p..
Guide Price: £22.70
£27.24 inc VAT
12.5mm Knauf Aquapanel Interior Cement Board 900x1200mm
Guide Price
Brand: Knauf Model and Size: 900x1200mm - 1.08m2
Delivery Time: 2 - 4 days
12.5mm Knauf Aquapanel Interior Cement Board is an extremely durable tile backer providing peace of mind in wet indoor areas such as bathrooms, shower rooms and wet rooms. Resistant to mould and mildew, Knauf Aquapanel Interior will not deteriorate in water. It retains its strength even if..
Guide Price: £20.87
£25.04 inc VAT
12.5mm Knauf Performance Plus - High Performance Plasterboard 1200x2400mm
Guide Price
Brand: Knauf Model and Size: 1200x2400mm - 2.88m2
Delivery Time: 1 - 2 days
12.5mm Knauf Performance Plus is a plasterboard with extremely high levels of sound, moisture, fire and impact resistance, ideally suited to schools, hospitals and commercial projects.  It has a high-density core with added performance-enhancing ingredients. It is available in tapered edge..
Guide Price: £25.80
£30.96 inc VAT
Brand: Knauf Model and Size: 1200x2400mm - 2.88m2
Delivery Time: 1 - 2 days
12.5mm Knauf Vapour Panel is a plasterboard specifically developed to offer superior vapour resistance performance. Knauf Vapour Panel has a metallised polyester foil creating an effective vapour barrier to limit moisture diffusion, ideal for lining the internal side of the external walls and u..
£18.76
£22.51 inc VAT
12.5mm Siniat GTEC Weather Defence External Sheathing Board
Guide Price
Brand: Siniat Model and Size: 2400x1200 - 2.88m2
Delivery Time: 2 - 4 days
12.5mm Siniat GTEC Weather Defence External Sheathing Board is a strong, highly moisture resistant and non combustible external sheathing board, faced with water repellent material for superior weather protection.  Thermal insulation can be installed within the frame, mechanically and/or a..
Guide Price: £46.02
£55.22 inc VAT
25mm Xtratherm Thin-R FR/ALU Flat Roof PIR Insulation Board (pack of 12)
Guide Price
Brand: Xtratherm Model and Size: 2400x1200mm - 34.56m2
Delivery Time: 2 - 3 days
25mm Xtratherm Thin-R FR/ALU Flat Roof PIR Insulation Board is a flat roof insulation with enhanced vapour resistant performance. Thin-R FR/ALU board is faced with low emissivity aluminium facings both sides. Rot proof and will remain effective for the life span of the building. Suitable for us..
25mm Xtratherm XtroLiner XO/PR Pitched Roof PIR Insulation Board Fire Rated - Pack of 12 25mm Xtratherm XtroLiner XO/PR Pitched Roof PIR Insulation Board Fire Rated - Pack of 12
Guide Price
Brand: Xtratherm Model and Size: 1200x2400mm - 34.56m2
Delivery Time: 1 - 5 working days
25mm XtroLiner XO/PR board has a core of modified polyisocyanurate (PIR) bonded to low emissivity textured aluminium foil facings. It offers excellent insulation performance with thermal conductivity of 0.021 W/mK and a Class ‘O’ fire rating. XtroLiner XO/PR is CFC & HCFC free and is manufacture..
38mm British Gypsum Gyproc Thermaline PIR MR Insulated Plasterboard - (25.5mm PIR + 12.5mm Gyproc MR WallBoard)
Guide Price
Brand: British Gypsum Model and Size: PIR MR - 38mm
Delivery Time: 1 - 5 working days
38mm Gyproc Thermaline PIR MR Insulated Plasterboard consists of a 12.5mm Gyproc Moisture Resistant Board factory bonded to a 25.5mm rigid polyisocyanurate foam (PIR) with a multi-layer Kraft/aluminium facer on both sides of the insulation board and conforms to BS EN 13950. ..
Guide Price: £84.69
£101.63 inc VAT
Brand: Marmox Model and Size: 1250x600mm - 7.50m2 -Free Delivery
Delivery Time: 2 - 3 days
4mm Marmox Multiboard Waterproof Insulation Board is a multifunctional board made from closed cellular structure rigid XPS foam, with a polymer-concrete coating on both sides, reinforced with a fibreglass mesh encased by carbon nano-fibres.CHARACTERISTICSCompletely waterproof,Very versatile and mult..
£159.30
£191.16 inc VAT
6mm Cembloc CemBacker - Tile Backer Building Board - 1200mm x 600mm 6mm Cembloc CemBacker - Tile Backer Building Board - 1200mm x 600mm
Guide Price
Brand: Cembloc Model and Size: 1200mm x 600mm - 0.72m2
Delivery Time: 2 - 3 days
6mm Cembloc CemBacker is a high performance high performance fibre cement tile backer building board used to provide provide fireproof and waterproof protection for floors in tiled rooms. This rigid fibre cement board offers great strength and stability with the workability of wood. It can be c..
Brand: British Gypsum Model and Size: 2400x1200mm - 2.88.m2
Delivery Time: up to 14 days
Glasroc F MultiBoard is a highly versatile, Class 0, non-combustible glass reinforced gypsum board manufactured by a unique continuous process, developed and patented by British Gypsum. The non-combustibility of gypsum and the reinforcement of glass fibre combine to produce a strong and resilient pr..
£31.27
£37.52 inc VAT
2 (0e 0s)
6mm Hardiebacker 250 Cement Floor Board
Guide Price
Brand: James Hardie Model and Size: 1200mm x 800mm - 0.96m2
Delivery Time: 2 - 4 days
6mm Hardiebacker 250 is backboard used as an ideal substrate for vinyl, natural stone and ceramic tiles, especially designed for floors and countertops. It can be used even for masonry walls, able to withstand loads of up to 100kg/m2. It consists of cement, cellulose, sand and selected additives, bu..
Guide Price: £12.97
£15.56 inc VAT
8mm Knauf Aquapanel Cement Board SkyLite 900mm x 1200mm
Guide Price
Brand: Knauf Model and Size: 900mm x 1200mm - 1.08m2
Delivery Time: 2 - 3 weeks
8mm Knauf Aquapanel Cement Board SkyLite is an extremely durable ceiling board that can be used in wet indoor areas such as bathrooms, shower rooms and wet rooms as well as some exterior soffits, dependent on specification. Knauf Aquapanel Skylite is resistant to mould and mildew and ..
Guide Price: £23.40
£28.08 inc VAT
87 (0e 0s)
Brand: Powerlon Model and Size: 50mm x 47.5m
Delivery Time: 2 - 3 days
Powerbond Aluminium FR VCL Tape - 50mm x 47.5m Roll is a high-performance aluminium flame-retardant tape designed for use with Powerlon Ultrablock vapour control layers. The thermo-reflective tape will seal any gaps and laps and would contribute to the performance of the VCL.CHARACTER..
£7.13
£8.56 inc VAT
Brand: Powerlon Model and Size: 2mm x 15mm x 24m
Delivery Time: 2 - 3 days
Powerbond Double-Sided Butyl Tape - 2mm x 15mm x 24m Roll is a high-performance sealing tape used to provide effective air, vapour and watertight joins for Powerlon Membranes.CHARACTERISTICSTechnically advanced,Double-sided tape,Seals Powerlon VCLs, Self-adhesive.APPLICATIONUsed for j..
£7.45
£8.94 inc VAT
Brand: Powerlon Model and Size: 1.5m x 50m - 75m2
Delivery Time: 2 - 3 days
Powerlon Air Barrier Membrane - 1.5m x 50m roll is a high-performance non-woven 112gsm membrane that will increase energy efficiency as it improves the air tightness in the building. This membrane is CE marked and certified for use in roofs, walls and floors. Powerlon Air Barrier is made f..
£79.22
£95.06 inc VAT
Brand: Powerlon Model and Size: 1.5m x 50m - 75m2
Delivery Time: 4 - 5 weeks
Powerlon UV 120 Membrane is a high-performance breathable water repellant UV resistant membrane for installations behind open or closed ventilated rainscreens and facade on walls. Made of polyacrylic and co-polymer materials, Powerlon UV 120 gives superior durability. T..
£134.49
£161.39 inc VAT
Brand: Powerlon Model and Size: 15m x 60mm
Delivery Time: 2 - 3 days
Powerlon UV Facade Tape - 60mm x 15m Roll is a high-performance facade tape that is technically advanced engineered with high UV resistance. It is highly UV resistant adhesive tape effectively joins Powerlon UV 120 and UV 160 membranes air and watertight.Note: Tapes should be kep..
£11.00
£13.20 inc VAT
Brand: Powerlon Model and Size: 10m x 50mm
Delivery Time: 2 - 3 days
Powerlon UV Nail Sealing Tape - 50mm x 10m Roll is a high-performance UV resistant double-sided tape to secure adhesive seal over nails and screws. Used with Powerlon UV 160 SA and UV 120 roof membranes. CHARACTERISTICSTechnically advanced,Double-sided,Seals any punctures made by..
£6.57
£7.88 inc VAT
Brand: Powerlon Model and Size: 1.6m x 50m - 80m2
Delivery Time: 2 - 3 days
Powerlon UltraBlock 200 - 1.6m x 50m roll is a high-performance reinforced polyethylene vapour control layer with a thermo-reflective layer which helps with the insulation of the building. These 104gsm thermo-reflective reinforced vapour control layers maximise energy efficiency of th..
£70.18
£84.22 inc VAT
Brand: Powerlon Model and Size: 2m x 50m - 100m2
Delivery Time: 2 - 3 weeks
Powerlon VCL 170 - 2m x 50m roll is a high-performance polyethylene-based vapour control layer with a mono-filament reinforcement scrim for tensile strength to protect the building envelop.  This 210gsm membrane will ensure that the building envelope is properly sealed to control vent..
£93.27
£111.92 inc VAT
Brand: Low-E Model and Size: 1.25m x 12m - 15m2 - Free Delivery
Delivery Time: 2 - 3 days
11mm SlabShield insulation was designed specifically for use under concrete slabs and gives you a vapour barrier and significant thermal performance in one user friendly product. The product has a layer of closed cell polyethylene foam applied to both sides of its reflective core. The closed cell fo..
£115.06
£138.07 inc VAT
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