JB1

Well deserving for a wooden spoon. S

Bostik. Secret nails/staples are 15g Sent

Finishing nail on top on the first and last row. You just need to hold it down the the glue dries, so no need for large top nail. Not very noticeable. lk

It has a few mm of tolerance. The pipe isn't under pressure. 15mm sounds about right alk

I agree, fresh from the butcher is best. However the issue is sometimes the butcher sells meat that is a few days old. That's not a problem if you eat it the same day or the day after you buy it. I've been caught out and had to throw meat out 2 days after buying it. At least with supermarket meat is they have a (refrigerated) shelf life of a week or more. This comes in handy as we generally only have time to shop on weekends. If the supermarket meat is starting to turn before...

Assuming moisture isn't an issue and the timber has acclimatised, risk of cupping is low. Had 180mm overlay hardwood in 2 houses fixed via secret nails and glue. No issues with cupping or gaps. No vapour barrier required as you're not on a slab. Correct. Good idea.

You're lucky You're able to cut it down. My neighbour as it close to our boundary and he applied to get it cut down. Council rejected it. I plan to poision the trees one day. lk

Can't secret nail if there's no subfloor. Sk

I think it will cost much more to lift the old boards and then install new ones. Also you can't secret nail it (if that's your preference) nor could you use 12/14mm overlay boards which will increase the price.

I can't see what 3mm ply is going to do. It's not very strong, there's a reason why they use 12mm ply under floorboards. Yes, nails are really there just to hold the timber in place while the glue dries. You can install the new flooring parallel but ideally perpendicular. I'd get a rough sand to make the floor slightly flatter and a better bond for the glue. Yes, nails should shoot through to the bottom. I'd say 38mm secret nails will do.

3 in 1 Seems like a great product, I'd say aimed at the direct stick application. Seems a waste and hassle to install it under the ply when plastic will do the same job as you also mechanically fix the ply to the slab with pins. What pins/nails is the installer using? I used something like this- https://www.yousta.com.au/product/koala-split-drive-anchors-countersunk-head/ Whatever the nails/pins, make sure the ply is installed in a brickbond pattern.

Nails may be ok but I used 50mm concrete split anchors. Spacing was 300mm. Had to pre drill the holes. I'm sure you can lay the ply yourself.. not a difficult job just repetitive. Your 3in1 adhesive idea won't work as you need to install builders plastic under the ply as a moisture barrier. lk

Very especially, but no need to install plywood between the timber. You can save some money and use 12-14mm overlay flooring, rather than 18mm solid. lk