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Great thanks, I'll make sure I add some in. I assume you mean on the new joists and I'm guessing one should be sufficient for each length of 2.4m joist. They'll be partly supported by the beams of the double fan construction too.

Thanks Ronny, The existing joists are part of a double fan roof truss spanning a total of around 8m, span at the centre of the trusses is about 3m. The 4.6m measurement is for my perpendicular joists. Your suggestions all make sense although your assumptions regarding the spacing between the...

Thanks catlad, The problem with them is that the unsupported span becomes the diagonal so even if you use a 60cm span for your flooring a pack of 12 only does a little over 1 square metre. At £15 to £20 a pack that means upwards of £300 for a 20sqm loft compared to £50 for the timber. At...

Hi, I am having the inadequate 100mm of insulation increased to somewhere nearer 300mm in my loft. and want to retain the storage space. I have considered increasing the insulation with celotex but the cost of this is prohibitive and so I am left looking at adding new joists around 20cm...

Will putting screws through the insulation not form a cold bridge? This is what my builders did and there are spots on the roof where frost or snow melts first which suggests they are sucking heat out of the house.

The felt and are on top of the trusses and are the same in every house in the street so definately not a retrospective fitting. I've been trying to get roofers in to take a look since May. The first one has done about 3 days work in the meantime and achieved nothing, The other 2 have so far...

MY roof has 3 layers between the loft and outside, first a layer of felt which would not take any water outside the house, then a layer of polystyrene insulation followed by an air gap and then concrete tiles. Can anyone tell me what the purpose of the felt is as it only seems to channel the...

I've just finished connecting a length of cable from the live terminal to the one containing the grey cables and guess what... It works. Thanks for you help. I think your question about measuring the voltage with the boiler removed made me look at the wiring in a whole new way. I guess it...

Timewaster, no. Just very impressed by the speed you work at. Clearly faster than my fingers can keep up with. I think I may have discovered what I overlooked last time and kind of confirms my previous comments about my plumber coming from Asda. If the grey live feeds to the valve...

Slapper: Are you talking about yourself? :P or my plumber? 45yearsagasman: The valves are honeywell and look like this (I think that they are spring return): I'll use the wiring diagram at http://wiki.diyfaq.org.uk/images/0/0d/S-Plan-Wiring.gif to describe what I am experiencing. The...

I have an S-plan heating system in which the 2 motorised valves are failing to switch the boiler on. They are both returning about 40 volts when switched on. Currently my heating system is set up to always have hot water on when heating is on but I would like to fix it so that they can both...

Super! Thank you all for your help. I was gluing the architrave so that I didn't need to hide nails in the varnished finish. But attaching some blocks of wood to the wall at the relevant places had the same effect as nails and held it in place until the glue set and it now looks fabulous...

I am fitting new varnished architrave to a door frame. Having cut the architrave to size I was about to fix it when I discovered that the sides of the door frame are not straight. One bows in about 2mm in the middle while the other bows out by the same amount. If I fix the architrave as it is...

Thanks for the replies. It was extended recently so no need to clean it. It's not so old that it's imperial (The house supply is 22mm from the 70s and the heating is 80s) I suspect it isn't but how do I tell if it's hardened? Replacing it with 15mm isn't an option as I would need to lift...

I'll let you all know as it progresses. I am currently trying to find a print shop who can provide me a sample for less than £20. So that I can tell if it will be possible.

the older sections of my heating system use 8mm microbore pipework. the piperuns are all above the ground floor and drop down walls where required. In one place it used to run along the top of the skirting board but the skirting has been replaced with taller wood and so the original bend in the...

Yeah, PVA isn't waterproof either. Once I get the maps I'll do a sample with varnish on an offcut and let you know how it goes.

Hi, I hope to be able to paper a small wall in my downstairs toilet (no showers) using standard ordnance survey maps. I understand that the best plan would be to put some sort of clear coat sealing on it afterwards to reduce damage but cannot find any suitable product. Does anyone have...

Thanks, Would the spots be visibly higher than the surrounding area if that was the case?

Hi everyone, I have a new insulated roof on my garage and dining room extension. When it is drying after a rain shower or in the morning it always has some dry spot about 3 inches in diameter which appear first. I assume that this is where insulation has been nailed in place. Can someone...