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I took up my underlay and grippers with the intention of re-using as much as I can. The problem with taking up cheap underlay - like mine - is that about 10-20% of it degrades and crumbles as you take it up. This makes it hard to re-use. Similarly with grippers I find about 10-20% of...

What is wrong with the existing joists ? Are they too thin or too far apart to support a normal room floor ? Are they partly missing ? Also why choose chipboard ? Think about 18mm T&G or plywood as a better alternative. Materials alone are going to cost you between £500 and £1000 depending on...

Agreed. For a big job like a 2 storey extension reject the chipboard. Instead spend around £400 or so on half a ton of "exterior WBP grade" 18mm plywood sheets. Suggest you order 10% more sheets than you need to account for wastage, cutting etc. The timber yard might even give you free...

Sorry about the earlier hijack... Have you got access to the floor above and can you take up your floorboards above you or does a neighbour live there.

Great. Thank you for your expertise. I think I will try the hanger method. I will use these or similar maybe 50cms apart all along the joist. http://www.screwfix.com/prods/73487/Building/Builders-Metalwork/Joist-Hanger-50mm-x-175mm I'm lucky in that my joists are very deep at around...

Warmcell what interesting stuff. Any idea how good it is at acoustic insulation e.g. decibels ? i.e. will it silence my noisy neighbours above and below me if I put bags of the stuff between my joists.

Are there such things as mini-joist hangers for noggings ? I want to fit noggings between two parallel joists. Haven't done this before and it would be so much easier if I could just screw some kind of right angled bracket to the side of the joist, drop the nogging in, screw that to the...

Can't answer the bonding part but I think its fine to keep your kitchen electrics as it is i.e. no need for an entirely separate "kitchen electrics" circuit. You already have the hob/oven on a separate circuit. The only suggestion I have is to take those "2 other sockets" you mention that are...

You might try identifying the worst of your floorboards and taking these up ( crowbar/jigsaw/make all cuts over a joist centre) and throwing them away completely. Then source your replacement floorboards from an olde worlde timber merchant - there must be one somewhere that sells reconditioned...

Sorry for the long post... Creating a new sub floor in a bedroom and living room. The old floorboards are being replaced with plywood sheets screwed down onto joists. The sheets are only 18mm thick compared with the 25mm thick floorboards I'm throwing away. My problem is a long stud...

Are these better for plywood ? http://www.axminster.co.uk/pricing/INC/recno/1/cid/5TRZ3637CBYQBIKWL47A46Y8NDS2STRD/product-Spax-Decking-Screws-21876.htm

I'm about to screw down half a ton of 18mm thick plywood onto joists. Please can someone advise on the best make, size and length of screws to use for this task ? These screws look good to me but I am inexperienced so am unsure ...

Pardon me hijacking the post but I have a very similar problem in the bedroom of my 1860's flat. The floors are all bowed and the two sides of the room are a good few inches higher than the middle. The bowed floorboards are very old and squeeky as well. Is the solution to somehow bolt new...

Based on what I've found around the web on this topic, I'm going to attempt a reply to my own post. The long dimension of the plywood sheets should be perpendicular to the floor joists. All plywood end joints should be centered on a joist. Joints should be staggered. Leave a 1/8" or 2mm...

Do I lay my eight foot plywood sheets so that two edges always meet on top of a joist ? This is my preference even though it involves more measuring and cutting and waste. Alternatively, .... should plywood sheets meet "in thin air" in the gap between the two nearest joists. This will...

Since it took me so long to find this information out, I thought I would share it in case it is useful to others. Bosch Single ovens HBN560551B Max. current draw (A): 16 HBN560561B Max. current draw (A): 16 HBN730551B Max. current draw (A): 15 HBN730561B Max. current draw (A): 15...

I was misinformed. For the oven I have in mind, the max current draw will be 15 or 16 Amps ( depends on exact model ) not 30 Amps. I want to replace the hob at the same time. The max hob rating will be 29 Amps or 32 Amps ( depends on exact hob model ). Hence my new hob+oven combination will...

My CU has a separate circuit for my hob. I'll check the exact MCB rating but its either 30 or 40 amps. I've removed/disconnected my ten year old electric oven and was surprised to discover it was connected to the general ring main circuit all along, protected by a FCU. It was never on its...

Marine plywood is the highest grade plywood and costs up to fifty pounds per sheet ( 8 feet by 4 feet by 18mm ) to buy from a timber merchants. This cost compares with around twenty to thirty pounds per sheet for ordinary ply. It is called "marine" because the special glue used to adhere the...

Would appreciate some guidance here. I am laying a new plywood subfloor onto existing joists using 8' x 4' sheets. Would a 2mm expansion gap be best around each board to allow for plywood expansion? I would prefer to butt each sheet against its neighbour and leave no gap. Not sure what's...