Types of insulation
| Type | What is in the range |
|---|---|
| Insulation board | Rigid PIR boards from Celotex, Kingspan and Recticel and phenolic Kingspan Kooltherm boards, 25mm to 200mm thick, most in 2400 x 1200mm sheets. Polystyrene (EPS) sheets from 25mm to 100mm |
| Insulation slab | Cavity wall slabs and batts from 50mm to 150mm: Knauf DriTherm, Isover CWS and Superglass Superwall. Rockwool RWA45, RW3, RW5 and Flexi slabs from 25mm to 140mm |
| Loft insulation rolls | Knauf Loft Roll 44, Isover Spacesaver and Superglass Multi-Roll 44 in 100, 150, 170 and 200mm, by the pack or the 24-roll pallet |
| Insulation rolls | Knauf FrameTherm Roll 32, 35 and 40 in 90 and 140mm and Knauf Rafter Roll 32 in 75 and 100mm, on 24-pack pallets |
| Insulated plasterboard | Celotex PL4000, Kingspan Kooltherm K118 and Gyproc ThermaLine thermal plasterboard, 22mm to 93mm thick, in 2400 x 1200mm boards |
| Acoustic insulation | Knauf Acoustic Roll and Isover APR 1200 partition rolls in 25, 50, 75 and 100mm, Isover RD Party Wall Roll in 75 and 100mm, and Rockwool acoustic slabs |
| Fire protection | Fire resistant plasterboard, Promat Supalux and Masterboard, Magply boards, Rockwool Ablative Coated Batts and Tenmat cavity fire barriers |
| Multi foil insulation | SuperFOIL SF19+, SF40 and SF60 multi-layer foil rolls, SFUF underfloor foil and SFTV thermal vapour barrier |
Most insulation is delivered in 3–5 working days. Kingspan boards and the Knauf FrameTherm and Rafter Roll pallets take 5–10 working days, and some Rockwool pallets take from three to ten weeks.
Wall insulation: boards, slabs and rolls
For a masonry cavity wall there are mineral wool cavity wall slabs and batts (Knauf DriTherm, Isover CWS, Superglass Superwall) and rigid cavity wall insulation boards (Celotex CW4000 and Thermaclass, Recticel Eurowall Plus, Kingspan Thermawall TW50 and Kooltherm K108). For timber frame walls there are Knauf FrameTherm rolls and Kingspan Thermawall TW55 and Kooltherm K112 boards. To insulate the inside of an external wall, insulated plasterboard is the internal wall insulation board. Wall insulation on a roll for internal stud walls is the Knauf Acoustic Roll or Isover APR 1200.
Loft, roof and floor insulation
Loft insulation rolls are glass mineral wool for insulating a loft at ceiling level: Knauf Loft Roll 44, Isover Spacesaver and Superglass Multi-Roll 44, in 100, 150, 170 and 200mm. For a pitched roof insulated at the rafters there are Knauf Rafter Roll 32 and the Kingspan Thermapitch TP10 and Kooltherm K107 boards, and for a flat roof the Kingspan Thermaroof boards.
For floors, Kingspan Thermafloor TF70 and Kooltherm K103 Floorboard are made for solid and suspended floors, Celotex GA4000 and Recticel GP boards are also listed by their makers for floors, and SuperFOIL SFUF is a foil underfloor insulation on a roll.
Insulation boards, sheets, panels and batts
Insulation sheets and insulation panels are other names for rigid insulation boards, and all of them are in the insulation board range. Batts are slabs: semi-rigid pieces of mineral wool cut to fit between studs, joists or the leaves of a cavity wall, sold in the insulation slab range.
What thermal insulation does
Thermal insulation is a barrier to heat flow: it slows the heat escaping from a home in winter and helps keep it cool in summer. A properly insulated house is more comfortable and more energy efficient, and its heating costs less. Mineral wool insulation also cuts noise transfer between rooms and from outside.
Buying insulation online: delivery and discounts
Online Insulation Ltd is an online insulation supplier: every insulation material for sale here is ordered on the site, without a trade account. Delivery is free on orders of £500 or more ex VAT, £45 below that and £60 below £200, and code TAKE2 takes 2% off orders over £2,000 + VAT. For pallet quantities see the bulk deals, and for breather and vapour control membranes see building membranes.
For help choosing, read our guides to the types of insulation for UK homes and insulation board types, or ring 01509 649065 (9am–5pm, Monday to Friday) for a price or a lead time.
