The new standard?

metalscrubber

Ok so the current building standards, 100mm, 40 gap, 60 insulation and 100mm block just meet the current U value requirements and there has been much discussion of the alternatives but is there any sign of a 'new' standard being adopted / published / accepted by the building industry ?

Metal

Jimbo

Aeroboard have developed a 150mm full cavity fill board that complies with the new regs, and got an IAB cert for it. 350 thick wall means wider footings though..

Mellor

Aeroboard has a higher conductivity than other rigid boards.
So other boards get the same value with lower figures.

The min values are still the same, but their might be difference in the max areas and average u-values when the re regs are published.

Slates

How about
External finish
100mm dense block
40mm cavity
75mm foil faced pir insulation
150mm Quinn lite block
Internal finnish

fatherbuzcagney

how about, 100mm dense block, 30mm cavity, inner leaf 100mm dense block, 50mm/70mm insulated plasterboard bonded direct to blockwork. No insulation in cavity. no scudding/scratch coat required internally. no skim coat. Tape and joint and paint. house would heat up alot quicker, loose heat slower with insulation on inside rather than in cavity. Still around 300mm.

Mellor

it would lose heat at the same rate, it would heat up faster though.

getfit

If you were to go with 100mm dense block, 40mm cavity, 75mm of kingspan insulation, 100mm dense block, 40mm to 75mm of insulated plasterboard like Kinspan Kooltherm K17....

Would the extra cost in both materials and labour give you an increased level of insulation to justify the extra spend??

fatherbuzcagney

Mellor wrote: »

it would lose heat at the same rate, it would heat up faster though.

would it not retain the heat longer due to insulation on innear leaf,therefore cool down period delayed/slowed down?

ardara1

fatherbuzcagney wrote: »

how about, 100mm dense block, 30mm cavity, inner leaf 100mm dense block, 50mm/70mm insulated plasterboard bonded direct to blockwork. No insulation in cavity. no scudding/scratch coat required internally. no skim coat. Tape and joint and paint. house would heat up alot quicker, loose heat slower with insulation on inside rather than in cavity. Still around 300mm.

Passivs House asked for an elemental value of 0.15 - It's as much as you'll need. 80mm PIR, 40mm residual cavity, and 50mm to the internal face, sealed and taped befoe plasterboard will achieve 0.15 U-value. WOuldn't worry too much about thermal mass - in every room you'll still have the internal walls and floor to gain mass from.

Mellor

fatherbuzcagney wrote: »

would it not retain the heat longer due to insulation on innear leaf,therefore cool down period delayed/slowed down?

No, the heat passes out at the same rate (this is heat as energy), but the lower exposed mass makes it heat up quicker. The inverse of this is that it cools quicker(this is temperature). But as ardara said, the floors and walls still provide mass. so the effect isn't that big at all.

metalscrubber

Hi all,

Apoligies, I did ask aroundabout - my question was: Does the Dept of Enviroment have plans to issue new building regulations / specifications any time soon?

Cheers,

Metal

sydthebeat

The current energy 'conservation regulations' are being upgraded. it should come into effect some time next year. Compliance with these new regs will have to be calculated mathematically, and the make up of your structure will depend on this.

personally i think 310 cavity walls will go from being the industry norm, to just barely meeting regulations.

Mellor

The draft was closed a few days ago go, the ammendments will be made and then a new list.
The U-Value limit for walls (and the rest) is possibly going to remain the same in the TGD

galwaytt

fwiw it's worth - check that Homebond will cover your build with a greater-than-100mm cavity.

The recently refused cover on a 150mm cavity build in Galway.........