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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 PlywoodRecticel 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

Brand: PSCoat Model: PSC 4ECO 250T ECBB BASIC B - 5 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 ..
Brand: Ancon Model: 140mm
Delivery Time: 1-3 working days
140mm Super-7 Thor-Helical Nails are used to fix counter-battens to rafters, without compressing the layer of insulation in-between. Super-7 Thor-Helical Nails are manufactured from stainless steel and are engineered with the precise Thor-Helical patented helix, and provide maximum corrosion re..
£152.44
£182.93 inc VAT
Brand: Novia Model: 1m x 50m - 50m2
Delivery Time: 1 - 2 days
Novia Black+ Pro 150GSM Roof and Wall Breather is a premium quality, versatile, heavyweight, very strong breather membrane for all pitched cold and warm roofs, and insulated wall applications. It has excellent water resistance and also provides high breathability. Novia Black Pro is completely black..
75mm Actis Hybris Panel - Reflective Multifoil Insulation - 1145mm x 1200mm - pack of 4 75mm Actis Hybris Panel - Reflective Multifoil Insulation - 1145mm x 1200mm - pack of 4
Guide Price
Brand: Actis Model: 1145mm x 1200mm - 5.5m2
Delivery Time: 2 - 3 working days
75mm 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: £42.18
£50.62 inc VAT
Brand: Unilin (prev. Xtratherm) Model: 1200mm x 370mm - 0.44m2
Delivery Time: 7 - 10 days
100mm Unilin Rafterlock Thin-R XT/RLOC is a high‑performance pitched roof insulation board comprising a rigid Polyisocyanurate (PIR) core between low emissivity foil facings. Its unique variable‑width design ensures a snug fit between rafters, delivering excellent thermal efficiency with reduced ins..
Brand: Hush Acoustics Model: 1250mm x 6m - 7.5m2
Delivery Time: 3 - 5 days
Hush FR Roofing Membrane is a fire-retardant acoustic and resilient layer specifically engineered for integration within flat roofing constructions. Unlike conventional waterproofing membranes, this product is fundamentally an acoustic and vibration damping material, uniquely manufactured from recyc..
Brand: Steico Model: 1350mm x 500mm - 0.68m2
Delivery Time: 2 - 4 weeks
20mm STEICO Protect Reveal is a rigid, vapour-open wood-fibre insulation board designed for use in ETICS (External Thermal Insulation Composite System) applications. It is the designated substrate for render in the critical areas of window reveals, door returns, and soffits, where space is limited b..
Brand: Steico Model: 1350mm x 600mm - 0.81m2
Delivery Time: 2 - 4 days
20mm STEICOtherm Wet is an ecological, vapour-open insulation board designed for applications where moisture management and thermal mass are critical. The Square Edge (SE) profile makes it particularly suitable for internal wall insulation (IWI) and floor systems where a tight, flush fit is required..
Brand: Steico Model: 1880mm x 600mm - 1.13m2
Delivery Time: 2 - 4 days
22mm STEICO Universal Wet is a high-density, rigid wood-fibre insulation board designed for both roof and wall applications. Manufactured using the traditional Wet Process, it relies on the wood’s natural lignin to bond the fibres together, creating a robust, vapour-open board that is exceptionally ..
Brand: Iko Model: 1200mm x 2400mm - 46.08m2
Delivery Time: 2 - 3 working days
30mm IKO Enertherm ALU PIR Rigid Insulation Board is a versatile insulation board with a rigid polyisocyanurate (PIR) foam core, clad on both sides with reflective aluminium. The seven-layer gas-tight aluminium lamination enhances resistance to fire and water ingress. It’s made without CFC, HCFC, o..
Brand: Kingspan Model: 1200mm x 1200mm - 1.44m2
Delivery Time: 3 - 4 days
30mm Kingspan Thermataper TT46 Board is a high-performance tapered PIR insulation board designed for flat roofs with mechanically fixed single-ply waterproofing. Thermataper TT46 is commonly used for flat roofs with mechanically fixed single-ply waterproofing. It offers effective thermal insulation,..
Brand: Steico Model: 1880mm x 600mm - 63.28m2
Delivery Time: 2 - 4 weeks
40mm STEICO Safe is a multi-functional, rigid wood-fibre insulation board designed for roofs with increased rain protection requirements. It is the only board in the range that can be used on low-pitch roofs (as low as 5°) without the need for an additional full-surface roofing felt or membrane, tha..
Brand: Steico Model: 1880mm x 600mm - 1.13m2
Delivery Time: 2 - 4 days
40mm STEICO Universal Dry is a high-performance, rigid wood-fibre board designed for both roof and wall applications. It is engineered to provide a wind-tight, weather-protecting "skin" for the building envelope. Using the dry manufacturing process allows for a board that is easier to handle than it..
Brand: Steico Model: 1190mm x 575mm - 80.28m2
Delivery Time: 2 - 4 weeks
40mm STEICOflex 036 is a flexible, high‑performance wood‑fibre insulation slab designed for exceptional thermal comfort, acoustic absorption and healthy building performance. Made from sustainably sourced wood and certified to rigorous European standards, it offers one of the best thermal conductivi..
Brand: Steico Model: 1190mm x 575mm - 6.84m2
Delivery Time: 2 - 4 days
40mm STEICOflex 036 is a flexible, high‑performance wood‑fibre insulation slab designed for exceptional thermal comfort, acoustic absorption and healthy building performance. Made from sustainably sourced wood and certified to rigorous European standards, it offers one of the best thermal conductivi..
Brand: Steico Model: 1350mm x 600mm - 45.36m2
Delivery Time: 2 - 4 weeks
40mm STEICOtherm Dry is a multi-purpose, rigid wood-fibre insulation slab. Because of its manufacturing process, it is significantly lighter than the "Wet" version, making it the preferred choice for large-scale roof and wall applications where reducing the structural load is key. the STEICOtherm Dr..
Brand: Steico Model: 1200mm x 380mm - 0.46m2
Delivery Time: 2 - 4 days
40mm STEICOtherm Internal Wet is an ecological, vapour-open insulation board designed for applications where moisture management and thermal mass are critical. The Square Edge (SE) profile makes it particularly suitable for internal wall insulation (IWI) and floor systems where a tight, flush fit is..
Brand: Owens Corning Foamglas Model: 1200mm x 600mm - 3.6m2
Delivery Time: 1-3 working days
50mm Owens Corning Foamglas T3+ Boards are high-performance thermal insulation products made from specially graded recycled glass and natural raw materials, such as sand, dolomite, and lime, which are abundantly available. Composed of millions of completely sealed glass cells, these lightweight, rig..
Brand: Owens Corning Foamglas Model: 600mm x 450mm - 2.7m2
Delivery Time: 1-3 working days
50mm Owens Corning Foamglas T3+ Boards are high-performance thermal insulation products made from specially graded recycled glass and natural raw materials, such as sand, dolomite, and lime, which are abundantly available. Composed of millions of completely sealed glass cells, these lightweight, rig..
Brand: Steico Model: 1325mm x 600mm - 30.40m2
Delivery Time: 2 - 4 weeks
60mm STEICO Special Dry is a multi-purpose, rigid wood-fibre insulation board manufactured using the modern Dry Process. It is designed to be installed on top of rafters (sarking) or on the outside of timber frame studs (sheathing). Because it is produced in a dry process, it can be manufacture..
Brand: Unilin (prev. Xtratherm) Model: 2400mm x 1200mm - 11.52m2
Delivery Time: 7 - 10 days
75mm Unilin Safe-R 019/MA (Roofs) is a high‑performance phenolic insulation board designed specifically for warm roof applications where exceptional thermal efficiency is required with minimal added build‑up. Its advanced phenolic core delivers one of the lowest thermal conductivities available in r..
Brand: Knauf Model: 1200mm x 1000mm - 36m2
Delivery Time: 8 - 12 weeks
80mm Knauf Rocksilk Krimpact Flat Roof Slab is a high-performance insulation solution designed specifically for flat roofing applications. Manufactured from non-combustible stone wool, this product offers excellent thermal insulation properties, helping to maintain comfortable indoor temperatures wh..
Brand: Unilin (prev. Xtratherm) Model: 1200mm x 600mm - 0.72m2
Delivery Time: 7 - 10 days
86mm Unilin Thin‑R XT/Walk‑R is a high‑performance insulated loft decking board, comprising a rigid 75 mm Polyisocyanurate (PIR) core faced with low emissivity foil and topped with an 11 mm OSB layer. Walk‑R is the solution that provides safe entry to the loft as well as improved insulation of the a..
Brand: Superglass Model: 1.14m x 3.9m - 4.45m2
Delivery Time: 2 - 3 working days
90mm Superglass Timber & Rafter Roll 32 is a lightweight, non-combustible glass wool roll that is designed to provide thermal insulation for external timber frame walls, warm pitched roofs, and suspended timber floors. This flexible roll is cut at 2x570mm widths to allow friction fitting between..
Brand: Steico Model: 1.5m x 50m roll - 1500m2
Delivery Time: 2 - 4 weeks
STEICOmulti Cover 5 is a 3-layer, translucent vapour control layer (VCL) with a fixed vapour resistance. It is engineered to provide airtightness in roof constructions, particularly when the work is being carried out from the exterior, such as laying the membrane over the rafters before installing i..
Brand: Steico Model: 60mm x 25m roll
Delivery Time: 2 - 4 days
STEICOmulti Tape F is a premium, single-sided adhesive tape designed for the permanent, airtight, and weather-tight sealing of junctions. Unlike standard paper tapes, it features a specialised UV-stabilised film reinforced with a polyester lattice, making it the heavy-duty choice for both inter..
Brand: Unilin (prev. Xtratherm) Model: Unilin Xtrafall
Delivery Time: 7 - 10 days
Unilin Xtrafall is a tapered roofing insulation system designed to deliver both thermal performance and bespoke drainage on flat roofs. By combining rigid Polyisocyanurate (PIR) insulation boards with precision‑engineered falls, the system eliminates standing water and the consequent damage often as..
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