Where to fix the insulation

[Republik]

I'm currently speccing an old vacant car retail unit for conversion into a vets practice. I'm trying to upgrade the insulation in the building before it goes in for building regs. I'm looking at adding another 100mm rigid insulation or 200mm(?) mineral fibre roll at roof level.

The first idea was to fit the insulation between the purlins but this would cause a cold bridge at the purlins themselves. So now I am looking into ways to fix the insulation to the face of the purlins to form a continuous layer of insulation.

How can this be done without drilling through the purlins (and therefore weakening them)?

The roof will then be dry lined and skimmed so needs to support this weight also.

Any ideas?

[herbialfa]

First question is why have such a high ceiling?

Its a lot more space to heat!

If you are looking to have a vaulted ceiling then use timber noggins cut to be hammered into the roof!

Not the best way forward IMO!

Suepended ceiling is the way forward.

[Spudler]

herbialfa said:

First question is why have such a high ceiling?

Its a lot more space to heat!

If you are looking to have a vaulted ceiling then use timber noggins cut to be hammered into the roof!

Not the best way forward IMO!

Suepended ceiling is the way forward.

Same as!

Or, and im assuming you'll be putting up walls etc, why not put joists in and use the space above?.

[Republik]

herbialfa said:

First question is why have such a high ceiling?

Its a lot more space to heat!

If you are looking to have a vaulted ceiling then use timber noggins cut to be hammered into the roof!

Not the best way forward IMO!

Suepended ceiling is the way forward.

Unfortunatly it has to be plasterboarded. Its part of the regs to achieve hospital status for the vets, blood splattering on ceiling tiles isn't a good look(!) and they aren't allowed any transfer of germs from one room to the next, so suspended ceilings isn't an option.

With the finished floor level, the lowest part of the roof is only 2.4m, I liked the idea of it following the line of the roof (15 degree pitch) with a flat section through the centre to allow for ducting.

The ideal solution would be to build and timber of metal stud ceiling with insulation laid on top, but because some rooms need to span nearly 8m it doesn't seem possible. The client is also keen to keep cost down. It's up to £600k already - £100k over budget!

[Busamav]

MF suspended ceiling system is your friend here , a plastered ceiling finish is easily obtained .

Partitions can pass through the ceilng where complete seperation is required .

As for access , maybe you could have tiles to the corridor or store areas .

[Republik]

Something like this?

http://manual.knaufdrywall.co.uk/knauf-systems/pag...

Are large spans a problem? The Lecture Room measures 8.75m x 6.2m

[m4ckg]

Busamav said:

MF suspended ceiling system is your friend here , a plastered ceiling finish is easily obtained .

Partitions can pass through the ceilng where complete seperation is required .

As for access , maybe you could have tiles to the corridor or store areas .

+1 mf ceiling can span any size room and its quick to put up

[Republik]

Sounds like it will do the trick. Thanks for the help.

[herbialfa]

Busamav said:

MF suspended ceiling system is your friend here , a plastered ceiling finish is easily obtained .

Partitions can pass through the ceilng where complete seperation is required .

As for access , maybe you could have tiles to the corridor or store areas .

OK I called it suepended ceiling, but I did mean suspended ceiling! LOL

The grid pattern for the tiles will make itr easy for you to replace the tile with bits of dogs bks on it!!!!