Celotex GA 4000 insulation wall boards are PIR boards, consisted of a rigid core and aluminium foil facings on both sides, made in standard 1200mm x 2400mm size and thicknesses from 50mm to 100mm. Kingspan Kooltherm K7 Pitched Roof Board is a premium performance rafter-level insulation for ventilated or unventilated pitched roofs. As shown to the right, a warm roof is a roof where the insulation is between roof rafters. to use kingspan or celotex inbetween roof rafters. as for direction of plaster board i always try to leave the minimum 'free' edges. I'd like to replace this with Celotex or Kingspan type insulation. Talking about metal roof insulation, this thing is one of the most challenging things people work in this field is facing.It demands and requires excellent skill and expertise which you may only get from a reputable roofing contractor. How to insulate 2x4 rafters? Insulation fixings should be used to hold the insulation materials in place. With the roof you have you would need to gain access to the pitched part of the roof from the inside and then install 50-70mm celotex insulation cut to the size of the roof rafters and threaded down the pitched part of the roof but be sure to leave 50mm gap for air flow then insulate the larger area with min 270mm loft roll and repair. With ridge-vents now fitted, all 4 sides should have a decent up-draught. Roll BreatherQuilt horizontally across each rafter, stapling continuously. If you want to create a warm loft, perhaps you plan to store precious items or want to use it as a games room, insulating the rafters (the timber or metal beams that support the roof) is the way to go. I'll cut the Celotex to fit snugly into the shapes made by the rafters. starting at one edge accross the roof to the other edge. Cut the boards using the Celotex Insulation Saw to rake and splay at ridge and verges to ensure close butted joints. Cut the insulation boards to size using a sharp knife or fin-toothed saw. Use construction adhesive between 1x4 and insulation board. You may also insulate your roof to help regulate the temperature in an attic that is a part of your living space. so im guessing parallel to rafters … A void should also be left behind the fascia, to ensure the free flow of air throughout. I understand we will have a “warm roof”. Starting at the bottom of the rafters, staple BreatherQuilt to the first rafter using 14mm staples (Max 300mm spacing). Install Celotex insulation boards with both edges supported by rafters. Fill the area with 1.5 inches thick Polyiso. Disclaimer – Multifoil-Insulation cannot be held responsible for any losses financially or physically from advice provided in this How-To-Guide. Roof - need ventilation and both products have a particular product for it Floor - doesn't need ventilation and you could just use normal insulation In both cases the celotex should fit snugly between the rafter … Getting to Know… Kingspan Kooltherm K7 Pitched Roof Board. You will also need a hacksaw to cut the insulation to size. Alternatively, some companies will put insulation between the conservatory roof rafters and conceal it behind a new ceiling, or install multilayer foil insulation to the underside of the roof. This works just as well in a new build as it does foran existing property, allowing insulation to be installed in a watertight roof without creating anydisturbance to a current restoration project. • Install Celotex insulation boards with both edges supported by rafters. Go with insulation between and over or between and under the rafters. The 4 boarded sides would then be topped with a 'ceiling' leaving a void above which is open to the rafter spaces an all 4 roof sides. Insulating the Roof. I'm wanting to insulate between the rafters of my loft. Ensure that the insulation boards fit tightly between the rafters Materials commonly used for the insulation of the roof deck include: for insulation 1st just nail it on, as many fixings as you need to keep it stable. Use large headed nails to temporarily fix board in place, until permanently secured by counter battens. Insulating the roof is a priority if the ceilings of your home happen to be part of the roof deck, as is the case with cathedral ceilings. Installing loft insulation in rafters. Running with the slope, lay 1x4 lumber flat onto the insulation 2ft O.C. For example (based upon the same roof build up): 100mm of Celotex GA4000 between the rafters (leaving a 50mm ventilated air path below the felt) Some people may prefer to use rigid insulation board to insulate the loft space – for example Celotex or Kingspan – the process is pretty similar to above, although you will need less depth to achieve the same insulation levels (than mineral wool). Local building codes regulate the minimum amount of insulation contractors must install in new homes, but existing homes can benefit from roof insulation as well. Celotex GA4000 General Purpose PIR Insulation Board (All Sizes) 2.4m x 1.2m I have a 1925 bungalow in Michigan (climate zone 5). This insulation is fitted between the rafters of the roof. nice tight sandwich effect. Apply insulation between rafters when finishing an attic into a heated room, or when building a cathedral ceiling in the home. Rafter-level insulation combined with ceiling insulation can be used together where an existing attic space is converted. In this article, we are going to explore both financial and technical aspects when it comes to looking for the best method to insulate the metal roofing. They are directly below the roof sheathing and are'/were insulated with fiberglass batts stapled between the 2x4 rafters. When insulating between rafters with the GA 4000 PIR board, the following guidelines apply. For further information about How to Insulate a Garage Floor I'm thinking I should increase the depth of the rafters slightly and insulate between them leaving a 50mm gap (due to non breathable felt) and then adding a layer of insulated plasterboard under the rafters. Celotex GA 4000 in Roof Insulation. This is done by cutting the rigid insulation board on a very slight angle with … Installation of SuperQuilt Insulation for under rafter should be in harmony with the official certificate. We used Kingspan Thermapitch TP10 zero ODP which is a 100mm-thick rigid board; Install the insulation flush with the bottom of the rafters, making sure that it does not fill the entire rafter depth. Celotex XR4000 between rafters Sustainable Insulation Celotex PIR insulation has been independently assessed by BRE Global and has been accredited with an A+ ratingwhen compared to the BRE Green Guide 2008. • Cut the boards using the Celotex Insulation Saw to rake and splay at ridge and verges to ensure close butted joints. There are some unfinished crawl space areas in the corners on the upper floor. Recommended fixing … Chauk line to idenify where your rafters are. An good option for a really well insulated roof is to increase the thickness of insulation under the rafter and also introduce a counter batten between the insulation and the plasterboard. Combined with ceiling insulation can be used together where an existing attic space is converted headed to. 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