Loft floor boards

DilbertJones

so do i need to buy a countersunk drill bit?

Poppycat

It would depnd on if you prefer a nice smooth finish. They aint expensive think I got mine with the drill in a pack of drill bits for £50. Probably only a quid or two. There always handy to have used it quite alot.

If you use the baords I got they blunt your saw as the wood is wood pulp with glue. I used a jigsaw to cut and went through quite a few blades

Thefunkygibbons

Poppycat wrote:

Actually compressing insulation has the opposite effect as air is a good insulator.

Surely then compressing ruins its ability

If I have 6 inch insultation, the squeesing it down to 3 inches to fit existing joists would down grade its insultaion qualities, not improve it

Poppycat

My comments were directed at the previous poster Funkygibbons thus were in agreement with what you stated, you quoted me out of context.

"Compressing the insulation actually improves the efficiency of it"

YorkshireBoy

Just to add to the other advice...

I'm not recommending you use 12mm chipboard, but be aware that you will be adding a lot of weight if using 18mm chipboard. Modern houses usually only have 3" or 4" trusses, and on "larger" sized bedrooms with long spans this "might" cause a problem.

You can buy drills with built in countersinking attactchments. I know B&Q do them at around £7 for screw sizes 6-14 but try your local ironmongers and save money on the "packaging". These have the added benefit that you don't get the same "bounce" because the drill is held steady and centralised whilst the countersinking is taking place.