Cavity Wall Insulation

[rosiew]

Hi All
We have an integral garage and in the winter the cold that blows up from the garage is unbelievable. It was suggested to put Kingspan boards on the ceiling. My question is would Cavity Wall insulation be as good because the Kingspan is very expensive and would be a lot of hard work. We have phoned the office and she (the receptionist) says they have done it before. Anyone out there that may know.
Thanks in advance

[beejay1124]

the cold that blows--is it coming in at the garage door

[buildersmate]

Kingspan and blown cavity wall insulation is similar stuff - polyurethane foam or similar. Kingspan just has a layer of aluminium reflective foil on the outside, each side.
I'm surprised that you reckon you can get a cavity wall installer to come to shove foam in the ceiling void for less money than you can buy Kingspan or Celotex.
But if that is the case then go for it.

[alavahalf]

I've got the exact same problem... I have a town house with an integral garage, and after last winter I said we will never suffer another. We dont use the garage for car storage, it's more a utility room.
So another one of my jobs before the winter arrives....
Get a pair of french doors of eBay...
Remove the existing steel garage door...
Fit a timber frame in the opening... made from 4'' x 2''
Then fit the doors in the frame...
Clad the exterior in 1'' ply... and then UPVC boards...
Insulate behind the ply and board over on the inside...
It's got to beat a steel garage door any day...!

[Mosaic]

Hear hear Alavahalf - after suffering years of chill winds (and mice, and frogs) getting in the gaps round the steel garage door, we got an obliging youth to install a wooden double door. Transformation! Should have done it years ago.
Does anyone anywhere keep a car in their garage?

[Count-A-Strong]

Be careful avahalf, the works you are proposing may be subject to planning permission and as your converting it to ''habitable space'' it may require a building notice completing as it will need to
comply with certain insulation regs (u values). Your local
authority planning dept should be very helpful, they usually are.

[buildersmate]

Not correct, I'm afriaid, Count.
Whether it is habitable space (or not) only becomes an issue if one is removing the original door between the garage and the rest of the house - otherwise from a Building Control viewpoint, its just a luxury garage, and a non-habitable space. As such it doesn't have to meet thermal or any other of the statutory building regs.
And it won't be a Planning issue either - unless (and this is very unlikely) the planners have an issue with the removal of an off-road car-parking space (by the removal of the space previously available to put a car).

[rosiew]

How did we drift away from my cavity wall insulation?. Is it a good idea or not guy's

[buildersmate]

Rewind 2 days for your answer.

[rosiew]

Buildersmate - Iv just got a £350 quote from Roc insulation, the garage is 9ft x 20ft with a 7" space to fill, do you think this is a good price. Im just not sure what to do as i dont want to spend all this money if it wont work. Do i go for this or the insulation boards. What a dillema

[tezestwing]

rosiew these firms that blow thermal insulation into floor and roof cavities want to be very careful that they dont bury electric cables into it there is a big risk of fire and polystyrene coming into contact with the cable degrades it, excuse the boring bit
HTH Tez

[Mosaic]

Rosie, I would recommend the door being changed to a conventional one as Buildersmate and I suggest - the draught coming through the gaps won't be prevented by installing insulation.