Insulation of timber raised floor

Adja

Me and my husband are looking to insulate timber raised floors in our house.In his opinion insulating over the existing floor(floorboards)will still work instead of lifting all the floorboards and insulating that way, which is lot of work.anyone has any experience in this?

sydthebeat

Adja wrote: »

Me and my husband are looking to insulate timber raised floors in our house.In his opinion insulating over the existing floor(floorboards)will still work instead of lifting all the floorboards and insulating that way, which is lot of work.anyone has any experience in this?

How is he planning on dealing with the reduction of door heights and also the raising of skirting boards, fire hearts etc?

Adja

Not sure.the rooms will just be smaller in height I guess?

godtabh

We had to do it on our last house. Pulled up floor boards and put insulated board down. Big enough job at the time

Gumbo

Adja wrote: »

Not sure.the rooms will just be smaller in height I guess?

Yes, but now the doors won’t open.

Your husband is going about it the wrong way. As the wife, make him listen to you. It will be a worthless exercise if you allow him to do it.

sydthebeat

Adja wrote: »

Not sure.the rooms will just be smaller in height I guess?

Not that simple.

There are regulations to be met, door heights standards to be kept.....

And hardly cheaper to purchase new doors etc and remove / replace skirtings and fire hearths....

Then just removing floor boards, insulating and re-placing the boards

micar

I'm planning on doing this but I will be taking up the floor boards.

I'm using rigid insulation which I will cut and put between the joists. Need to make sure they fit tightly so they don't drop out.

He could tap in nails near the bottom of the joist to keep the boards from dropping out.

If there are any gaps, you can use expanding foam.

Before putting the floor boards back down, I will be putting down an airtighness membrane and taping the overlaps.

I'm also taking off the skirting and as the membrane will be taped to the walls about 2 inches off the floor.

Just need to make sure the vents are not blocked as air still needs to circulate.

Will also be insulating the central heating pipes as well.

Deco99

We talking about suspended floors?

Did it last summer. Took up the floorboards in entire house. (Lesson learned here use a long crow bar and something to lever with rather than try to take the boards up with smaller nail bar and hammer) 5 times faster.

Put down roof felt membrane overlapping and between the joist, 100mm and 150mm layers of metac.has to be good quality insulation. Another layer of membrane on top. Subfloor of plywood then.

Adja

We are renovating the whole house:new windows,doors,skirting boards,tiling some floors etc. So getting new doors and boards is in our budget.

sydthebeat

Adja wrote: »

We are renovating the whole house:new windows,doors,skirting boards,tiling some floors etc. So getting new doors and boards is in our budget.

Are all your doors 7' ??

If so, does your budget include raising every head?

Deco99

How would you even insulate without taking up the floorboards? This just sounds like your robbing Peter to pay Paul. I did the insulation myself with one or two family helping taking up the boards. Maybe €3k to do the whole house including plywood. The more rigid board might be better but that's still same idea

MicktheMan

Deco99 wrote: »

(Lesson learned here use a long crow bar and something to lever with rather than try to take the boards up with smaller nail bar and hammer) 5 times faster.

Or this

Yellow_Fern

some suspended timber floors let in a lot of draughts between the boards. A good underlay and carpet wont add alot of insulation value but can make a house a lot warmer.

BryanF

Yellow_Fern wrote: »

some suspended timber floors let in a lot of draughts between the boards. A good underlay and carpet wont add alot of insulation value but can make a house a lot warmer.

You use an air-tightness layer taped and sealed to avoid drafts.

micar

MicktheMan wrote: »

Or this

The power of a long lever.

Gumbo

Adja wrote: »

We are renovating the whole house:new windows,doors,skirting boards,tiling some floors etc. So getting new doors and boards is in our budget.

Then insulate under the floor boards. Crazy idea not to.

Deco99

micar wrote: »

The power of a long lever.

Complete amateurs we started with two people armed with hammers and nail bars. Took hours to clear two rooms. Then carpenter arrived and started the other room with long bar and done in minutes. Just looked at each other and agreed to never talk of it again