New house insulation

shazzyb

Hi,
I know there are numerous threads related to different insulation issues but I'm in the middle of a new build and would like some advice in laymans terms. To date I have put

• 5" kingspan in the base
• 6" (150mm) cavity with 4" (100mm) kingspan insulation in the cavity.

The house is a 2 storey house with concrete slabs between ground and 1st floor.
I'm planning on using 50mm insulated slabs on the inside of all external walls. What is the best method of doing this ? Mushroom fixing directly to the block wall (no air gap) or battening the wall and fixing to the battens.

In addition i was planning on using 50mm insulated slabs on the ceiling of the 1st floor. Is this the best option and what extra insulation should I use in the attic?

Thanks in advance.:)

topcatcbr

shazzyb wrote: »

Hi,
I know there are numerous threads related to different insulation issues but I'm in the middle of a new build and would like some advice in laymans terms. To date I have put

• 5" kingspan in the base
• 6" (150mm) cavity with 4" (100mm) kingspan insulation in the cavity.

The house is a 2 storey house with concrete slabs between ground and 1st floor.
I'm planning on using 50mm insulated slabs on the inside of all external walls. What is the best method of doing this ? Mushroom fixing directly to the block wall (no air gap) or battening the wall and fixing to the battens.

In addition i was planning on using 50mm insulated slabs on the ceiling of the 1st floor. Is this the best option and what extra insulation should I use in the attic?

Thanks in advance.:)

Your wall insulation is preey good. Personally i would use the mushroom fixings. I have done it both ways and find the mushroom fixings are alot less labour intensive. also any attitional insulation gained through the cavity between battons will amlost certainly be lost through air leakage. Make sure to seal the slabs to the wall using adhesive sealant detaild for this may be found in the scotish accredited details.
The ceiling is Ok with the 50mm slab this will deal with thermal bridging through the ceiling joists. add an additional 10" of fibre glass in attic space. Two layers 1 layer 6" and 1 layer 4" going opposite direction.

gman2k

Now, you've lot's of insulation, time for air tightness!