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Roof Insulation

Thermal roof insulation is usually installed to improve thermal performance of the house (reduce heating and cooling of space). This in turn reduces energy use to make the house warm. It also reduces carbon dioxide emission to make the house more environmentally friendly and also reduces energy cost. The advantages of installing roof insulation are the increase in living space (converted lofts) and the elimination of condensation on roof surfaces during cold temperatures.

The roof insulation must be installed dry and be kept in this state. When installing board and batt type roof insulation, gaps should not be left as they minimize roof insulation effectiveness. Other factors influencing roof insulation effectiveness include temperature cycling, vibrations, and other similar mechanical forces. The functionality of your roof membrane is also crucial. If you cannot install roof insulation correctly, you will seriously impair its efficiency.

Two types of roof are most commonly found in commercial and residential settings: Flat Roof and Pitched Roof.

Flat Roof

Flat roof can be constructed to create what is called a ‘warm roof’ or a ‘cold roof’ depending on the position of the insulation installed. Inverted roof construction is also used in flat roofs exposed to high temperatures.

Pitched Roof

Depending on the design two types of pitched roof can be found: with a ceiling and without a ceiling. Pitched roofs also use cold and warm specification. These can be further classified into cold breathing, cold ventilated, warm breathing and warm ventilated roofs.

Insulationhsop.co offers a wide range of flat and pitched roof insulation from the manufacturers: Celotex, Xtratherm, Knauf, Kay Metzeler, Cellecta and others. For more information about the particular products please see product description.

R-value Comparison Chart for Roof Insulation for products available at Insulation Shop


Legend

1* Rockwool RW3 Slab (Prorox SL930)

2* Earthwool RS45 Universal Slab, Earthwool RS60 Universal Slab, Earthwool RS100 Universal Slab, Rockwool RWA45 (Prorox SL920)

3* Earthwool Flexible Slab, Rockwool Flexi Insulation Slab

4* Rockwool Hardrock Multi-Fix Dual Density Board

5* Rockwool RW5 Slab (Prorox SL960)

6* Celotex FR5000 Fire Resistant Insulation Board, Xtratherm XtroLiner Insulation Board

7* Celotex TB4000 Insulation Board, Celotex GA4000 Insulation Board, Celotex XR4000 Insulation Board, Celotex Crown-Bond Flat Roof Insulation Board, Celotex Crown-Fix Flat Roof Insulation Board, Celotex Crown-Up Flat Roof Insulation Board, Kingspan Thermapitch TP10 Pitched Roof Insulation Board, Kingspan Thermaroof TR26 Insulation Board, Xtratherm Thin-R Insulation Board, Recticel Eurothane GP Insulation Board, EcoTherm EcoVersal Insulation Board, Kingspan Thermaroof TR31 bonded to Plywood, Xtratherm Plydeck bonded to OSB, Recticel Plylok Flat Roof Insulation bonded to Plywood, EcoTherm Eco-Deck - Insulated Flat Roof Decking

8* Kingspan Thermaroof TR24 Insulation Board, Kingspan Thermaroof TR27 Insulation Board, Xtratherm Flat Roof Board FR-MG, Xtratherm Flat Roof Board FR-BGM

9* Kingspan Kooltherm K7 Pitched Roof Board, Xtratherm Safe-R insulation Board

10* Cellecta Yelofoam X2i, Cellecta Hexatherm XPLY Plywood Thermal Laminate Roof Board, Kingspan Styrozone H350R Flat Roof XPS Board

11* Grey Polystyrene (Graphite) EPS

12* Cellecta Hexatherm XROOF 300L XPS, Cellecta Hexatherm XDRAiN

13* Cellecta Hexatherm XROOF 300L XPS, Cellecta Hexatherm XMD Vertical Up-Stand Roof Board, Cellecta Hexatherm XDRAiN Drainage Channel Inverted Roof Board, Sundolitt XPS300 Extruded Polystyrene Board

14* Kingspan Styrozone N300R XPS Board 

15* EPS100 Polystyrene Insulation Board Jablite, Kingspan Styrozone N500R XPS Board

16* EPS70 Polystyrene Insulation Board Kay-Metzeler 

17* Jablite EPS70 Polystyrene Insulation Board

18* White Polystyrene Board

CHOOSE MANUFACTURERS

Powerlon Ultraperm Premium 135gsm Breather Membrane 1.0m x 50m Roll
Guide Price
Brand: Powerlon Model and Size: 1.0m x 50m - 50m2
Delivery Time: 2 - 3 working days
Powerlon Ultraperm Premium 135gsm Breather Membrane is a high performance non-woven composite breathable underlays for all pitched roofs and timber frame wall applications. Powerlon Ultraperm Premium is tough, durable and tear resistant with exceptional water vapour permeability and water repellent ..
Guide Price: £49.40
£59.28 inc VAT
Powerlon Ultraperm Max 155gsm Breather Membrane 1.0m x 50m Roll
Guide Price
Brand: Powerlon Model and Size: 1.0m x 50m - 50m2
Delivery Time: 2 - 3 working days
Powerlon Ultraperm Max 155gsm Breather Membrane is a high performance non-woven composite breathable underlays for all pitched roofs and timber frame wall applications. Powerlon Ultraperm Max is tough, durable and tear resistant with exceptional water vapour permeability and water repellent characte..
Guide Price: £59.81
£71.77 inc VAT
Powerlon Metalix Breathable Membrane - Metal Roof Separation Layer - 1.5m x 25m Roll
Guide Price
Brand: Powerlon Model and Size: 1.5m x 25m - 37.5m2
Delivery Time: 2 - 3 working days
1.5m x 25m Powerlon Metalix Breathable Membrane is a high performance multilayer, breathable membrane with a 3-D top layer, specifically suitable for metal, zinc and copper roofs. The three-dimensional top layer ensures that the roof cladding can move in the event of temperature fluctuations. The Po..
Guide Price: £197.60
£237.12 inc VAT
Powerlon SupaPerm SP100 Housewrap Breather Membrane - 1.6m x 100m Roll
Guide Price
Brand: Powerlon Model and Size: 1.6m x 100m - 160m2
Delivery Time: 2 - 3 working days
Powerlon SupaPerm SP100 Housewrap Breather Membrane is a high performance single-layer woven breathable fabric used for the protection of walls in timber frame structures and for profiled metal industrial roofs. The high density polyethylene fibres are bonded together with high pressure and heat to ..
Guide Price: £81.91
£98.29 inc VAT
Powerlon ThermaPerm Housewrap Termo-Reflective Breather Membrane - 1.5m x 100m Roll
Guide Price
Brand: Powerlon Model and Size: 1.5m x 100m - 150m2
Delivery Time: 2 - 3 working days
Powerlon ThermaPerm Housewrap Thermo-Reflective Breather Membrane is a high performance single-layer woven breathable fabric used for the protection of walls in timber frame structures and for profiled metal industrial roofs. The high density polyethylene fibres are bonded together with high pressur..
Guide Price: £231.09
£277.31 inc VAT
Brand: Powerlon Model and Size: 1.5m x 50m - 75m2
Delivery Time: 2 - 3 working days
Powerlon FlameOut Breathe Fire-Retardant Membrane is a high performance breathable fire-retardant membrane made from non-woven fabrics with superior self-extinguishing and flame-retarding properties. Flame retardant membranes are resistant to catching fire, reduce flammability, and inhibit, suppress..
£103.07
£123.68 inc VAT
Brand: Powerlon Model and Size: 2m x 50m - 100m2
Delivery Time: 2 - 3 working days
Powerlon FlameOut Block Fire-Retardant Membrane is a high-performance breathable polyethylene-based fire-retardant vapour control layer with a mono-filament reinforcement scrim surface to provide excellent tensile strength. The fire-retardant has superior self-extinguishing and flame-retarding prope..
£95.98
£115.18 inc VAT
Powerlon UV 120 - UV Resistant Facade Membrane - 1.5m x 50m Roll - 120gsm
Guide Price
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. The sun emits ultraviolet (UV) ..
Guide Price: £134.49
£161.39 inc VAT
Powerlon UV Facade Tape - 60mm x 25m Roll
Guide Price
Brand: Powerlon Model and Size: 15m x 60mm
Delivery Time: 2 - 3 working days
Powerlon UV Facade Tape - 60mm x 25m 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 kept free of moisture a..
Guide Price: £19.64
£23.57 inc VAT
Powerlon UV Nail Sealing Tape - 50mm x 10m Roll - Double-sided
Guide Price
Brand: Powerlon Model and Size: 10m x 50mm
Delivery Time: 2 - 3 working 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 nails/screws, Self-..
Guide Price: £6.83
£8.20 inc VAT
Powerlon Air Barrier Membrane - 1.5m x 50m roll
Guide Price
Brand: Powerlon Model and Size: 1.5m x 50m - 75m2
Delivery Time: 2 - 3 working 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 from reinfo..
Guide Price: £79.22
£95.06 inc VAT
Powerlon VCL 170 - Vapour Control Layer - 2m x 50m roll - 210gsm
Guide Price
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..
Guide Price: £93.27
£111.92 inc VAT
Powerlon UltraBlock 200 - Thermo-reflective VCL - 1.6m x 50m roll - 104gsm
Guide Price
Brand: Powerlon Model and Size: 1.6m x 50m - 80m2
Delivery Time: 2 - 3 working 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..
Guide Price: £70.18
£84.22 inc VAT
Brand: Powerlon Model and Size: 2mm x 15mm x 24m
Delivery Time: 2 - 3 working 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 jointing and ove..
£7.45
£8.94 inc VAT
Powerbond Aluminium FR VCL Tape - 50mm x 47.5m Roll
Guide Price
Brand: Powerlon Model and Size: 50mm x 47.5m
Delivery Time: 2 - 3 working 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.CHARACTERISTICSTechnical..
Guide Price: £7.13
£8.56 inc VAT
50mm Actis Hybris Panel - Reflective Multifoil Insulation - 1145mm x 1200mm - pack of 4 50mm Actis Hybris Panel - Reflective Multifoil Insulation - 1145mm x 1200mm - pack of 4
Guide Price
Brand: Actis Model and Size: 1145mm x 1200mm - 5.5m2
Delivery Time: 2 - 3 working days
50mm Actis Hybris Panel is a multi-foil insulation featuring a unique and flexible honeycomb structure that combines insulation, air tightness, moisture resistance and reflective properties. The low-emmissivity honeycomb structure is protected from excessive dust and air movements. Actis Hybris..
Guide Price: £28.64
£34.37 inc VAT
90mm Actis Hybris Panel - Reflective Multifoil Insulation - 1145mm x 1200mm - pack of 4 90mm Actis Hybris Panel - Reflective Multifoil Insulation - 1145mm x 1200mm - pack of 4
Guide Price
Brand: Actis Model and Size: 1145mm x 1200mm - 5.5m2
Delivery Time: 2 - 3 working days
90mm Actis Hybris Panel is a multi-foil insulation featuring a unique and flexible honeycomb structure that combines insulation, air tightness, moisture resistance and reflective properties. The low-emmissivity honeycomb structure is protected from excessive dust and air movements. Actis Hybris..
Guide Price: £42.50
£51.00 inc VAT
25mm Unilin FR-BGM Flat Roof Insulation Board (pack of 18)
Guide Price
Brand: Unilin (prev. Xtratherm) Model and Size: 1200x600mm - 12.96m2
Delivery Time: 3 - 5 days
25mm Unilin FR-BGM is a BBA certified high performance PIR insulation board that is faced with a fleece finished bitumen/glass facers and is suitable for use below partially bonded bitumen based built up roofing systems. Unilin FR-BGM is suitable to apply torch on felt directly on the insulation. FR..
Guide Price: £129.93
£155.92 inc VAT
Brand: Unilin (prev. Xtratherm) Model and Size: 2400x1200mm - 34.56m2
Delivery Time: 1-3 working days
25mm Unilin Thin-R FR/ALU Flat Roof PIR Insulation Board is a flat roof insulation with enhanced vapour resistant performance. Unilin 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. Unilin Thin..
Brand: YBS Insulation Model and Size: 1.05m x 25m - 26.25m2 - Free delivery
Delivery Time: In Stock 1-2 working days
4mm YBS YBS Airtec Double is a flexible, easy to install, multi-layer reflective aluminium foil air bubble insulation membrane in between hat acts like airtight vapour control layer. The core bubble profile offers thermal benefits by trapping air within its bubble structure while creating low e..
£73.00
£87.60 inc VAT
Brand: YBS Insulation Model and Size: 1.2m x 10m - 12m2 - Free delivery
Delivery Time: 1-3 working days
15mm EcoQuilt Expert is a flexible, easy to install, 1.2m wide multi-layer insulation blanket for roofs, walls & floors that effectively deals with all forms of energy transfer, offering tremendous thermal benefits. It consists of 6 layers of material including reflective foil on both sides and ..
£95.68
£114.82 inc VAT
Model and Size: 1.5m x 10m - 15m2 - Free delivery
Delivery Time: 1-3 working days
45mm EcoQuilt 45 is a flexible, easy to install, 1.5m wide multi-layer insulation blanket for roofs, walls & floors that effectively deals with all forms of energy transfer, offering tremendous thermal benefits. It consists of 11 layers of material including reflective foil on both sides and wil..
£123.58
£148.30 inc VAT
Brand: Knauf Model and Size: 1200mm x 400mm - 5.76m2
Delivery Time: 2 - 5 working days
50mm Knauf Omnifit 35 Glass Wool Slabs are rigid multipurpose, flexible, non-combustible glass mineral wool slab that is designed for friction fitting installation at 400mm spacings. It has excellent thermal, acoustic, and fire resistance. The sound absorption qualities of Knauf Omnifit slabs are re..
Brand: Knauf Model and Size: 1200mm x 600mm - 8.64m2
Delivery Time: 2 - 5 working days
50mm Knauf Omnifit 35 Glass Wool Slabs are rigid multipurpose, flexible, non-combustible glass mineral wool slab that is designed for friction fitting installation at 600mm spacings. It has excellent thermal, acoustic, and fire resistance. The sound absorption qualities of Knauf Omnifit slabs are re..
6mm Knauf Rooftop Aquapanel Cement Board - 900mm x 1200mm
sale!
Brand: Knauf Model and Size: 900mm x 1200mm - 1.08m2
Delivery Time: 5 - 7 days
6mm x 900mm x 1200mm Knauf Rooftop Aquapanel Cement Board is an extremely durable construction board highly resistant to moisture, mould and mildew growth. It can be used as a cover board above the insulation and as a substrate to take on the waterproofing layer. Knauf Aquapanel Cement Board Ro..
£59.50 (£71.40 inc VAT)
£39.50
£47.40 inc VAT
Brand: PSCoat Model and Size: PSC 4ECO 250T HP - 18 litres
Delivery Time: 5 - 7 days
PSC 4ECO 250T HP is a highly efficient non-toxic, environmentally friendly, energy-saving and flexible insulation paint for insulating and sealing metal surfaces. All types of steel, aluminum, non-ferrous metals, metal roofs, metal tanks, pipes, valves, various industrial equipment can be paint..
Brand: PSCoat Model and Size: PSC 4ECO 250T ECE ELASTIC - 18 litres
Delivery Time: 5 - 7 days
PSC 4ECO 250T ECE ELASTIC is a highly efficient non-toxic, environmentally friendly, energy-saving and flexible insulation paint for insulating and sealing plastic and metal surfaces. It has thermo-reflective properties and increased adhesion to the substrate and covers micro cracks with just one co..
Brand: PSCoat Model and Size: PSC 4ECO 250T ECR ROOF - 18 litres
Delivery Time: 5 - 7 days
PSC 4ECO 250T ECR ROOF  is a highly efficient non-toxic, environmentally friendly, energy-saving and flexible insulation paint for insulating and sealing new and old metal roofs and roof structures. It is also suitable for clay and concrete tiles on roofs with a slope of more than 3%. It can al..
Brand: PSCoat Model and Size: PSC 4ECO 250T BASIC - 18 litres
Delivery Time: 5 - 7 days
PSC 4ECO 250T BASIC is a highly efficient non-toxic, environmentally friendly, energy-saving and flexible insulation primer for insulating and sealing metal surfaces. PSC 4ECO 250T BASIC primer can be used on all types of steel, aluminum, non-ferrous metals, metal roofs, metal tanks, pipes, valves, ..
Brand: PSCoat Model and Size: PSC 4ECO 250T ECBB BASIC B - 18 litres
Delivery Time: 5 - 7 days
PSC 4ECO 250T ECBB BASIC B is a highly efficient non-toxic, environmentally friendly, energy-saving and flexible insulation primer for insulating and sealing plastered surfaces. PSC 4ECO 250T BASIC primer can be used on gypsum boards, plasterboards, gypsum, cement and cement-lime plasters, concrete ..
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