Inception, Initiation and Indication of Insulation Installation Information

It's getting to that stage of the job where what would normally be large stand alone jobs have to be split into smaller parts to allow related works to be progressed.  In this case, i need to complete the construction of the party wall to be able to construct the en-suite partition, which in turn is required to allow the electrician to finish his first fixing of cable runs.  Normally the velux windows would have been fitted prior to the insulation being fitted to the roof, however, poor weather and limited daylight hours are making this difficult, so i'm pressing ahead with the fitting of insulation in particular areas.

Budget management is crucial and an opportunity arose to purchase all my insulation in one go at a very good bulk price.  The advantage of this is that I will have all the insulation to hand as each part of the job progresses.  The dis-advantage (for some) is the need to store all the materials. Fortunately i have sufficient storage space.

A 'local' company (20 miles away), Malcolm Insulation, was able to provide all of the insulation i needed.  The 80mm and 40mm sheets for the roof and oxter walls and the 145mm slab for the oxter and party walls.  The approved drawings recommended using Kingspan, however Malcolm Insulation supply Ballytherm boards and they were able to confirm that the U and R values provided the same level of thermal insulation as Kingspan but for half the cost.  They were even able to deliver within 24hrs of my order. Can't argue with that!

Quite a pile of insulation.  Fortunately, the garage was able to hold it all.

As you will recall from the previous post, the party wall partition was to be insulated on the back side, with a 25mm gap to be maintained from the party wall.  The 40mm boards were secured in place using 'No More Nails' and as per the picture below, the 25mm gap was maintained.  80mm insulation boards were also fitted to the roof rafters.

25mm air gap between party wall and partition

The 80mm insulation boards were cut and push-fitted between the rafters on the roof side.  A 50mm air gap between the underside of the sarking and the insulation board was maintained by the fitting of small 50mm fillets.

Once the No More Nails had set and the insulation boards were secure, the 145mm insulation slabs were cut and fitted into the party wall partition.

So there we go, now you have information on the installation of insulation and an indication of it's initiation and inception.