Thread: Retro fitting under-roof insulation

We have seen a house that we quite like, but it has no under-roof insulation (and it uses those shitty red bricks instead of Q-Con). Can the foil sheeting be fitted retrospectively or is there another product that has to be used?

The house is a bungalow, so a reasonably large roof area (145m2 floor area).

Originally Posted by Marmite the Dog

Can the foil sheeting be fitted retrospectively or is there another product that has to be used?

Not really. More trouble than it's worth.

Laying insulation on ceiling your best bet and will give you good insulation from attic heat.

The central section of the roof is actually raised a wee bit, so I'm hoping there are vents there (probably not though) and I may consider some point in the future to put in an attic room if there is enough headroom. But I digress...

So what sort of ceiling insulation? The normal fibreglass stuff or do they have something different here?

Reference our resident insulation and electrical expert.

https://teakdoor.com/construction-in-...-for-ac-3.html

Originally Posted by Marmite the Dog

So what sort of ceiling insulation?

Homemart has 2 thicknesses. 3 and 5 inch I believe.

What would we do without Butterfly's home improvement expertise?

Thanks Norts.

Can spray with polyurathane foam if you have good access.

^^^^^^^I was going to say the same spray the underside of the roof tiles not only give you good insulation also water proof

^ Spraying is expensive and seals the area well, but the heat can't escape unless it is very well vented, I have it and would never do it again. Becomes like a greenhouse!

Our house was fitted with insulation after construction.
It works well.
The temperature difference above and below the insulation is more than I thought possible.

Originally Posted by Thetyim

Our house was fitted with insulation after construction.

Was it fitted on top on the ceiling or under the roof?

I have used the foil insulation on three homes in BKK. The roof was removed in sections, foil laid down and the roof tiles were placed back into place. Have had only one small leak which was easily fixed.

The difference before and after is quite noticeable.

I've got to do that with our place going to use the spray on stuff as there are one or two leaks. Then use the insulation stuff on the ceiling.

Originally Posted by Marmite the Dog

Was it fitted on top on the ceiling or under the roof?

On top of the ceiling