Russell griffiths

Is this a detached garage, or attached to your house. Two very different sets of answers.

The holes in the osb that scanda hause use are about the size of a 2p why not fit your membrane directly onto the osb with holes then counter batten. No wind washing then.

Put them where, spread sheet ????????? oh how I laughed, I’m a silly navvy not a mathematician membrane picked by trying to tear it apart, poking my finger through it, and how many free t shirts and knives the rep gave me.

Better stainless, ridiculous markup because they have a fancy name. TBH it’s a stainless trough with a grid on top, any good fabrication shop could knock one up for £50.

TBH I’ve picked the dearest option, I just put this up for others reference.

So the snow turned up, and being a soft southern sod I needed to find something to do that didn’t involve going outside. So 72 hours later there’s not a drop of water passed through either of these roof membranes. How else do I decide which one to use, both from the same manufacturer, difference in price between the two is roughly £300. Its not just @JSHarris who’s the scientist, can I have an OLOGY.

Here’s a random idea why not install a sewage treatment plant, and then just pump cleaned grey water instead of lumpy poo water. Would only require the digging of a shallow, narrow trench to take the 65mm pipe, no fall needed

Er er er can’t help it, can’t hold tongue nope it’s shit don’t do it.

i Was taught that if you have nothing good to say then say nothing. So im sitting here trying not to say anything.

Have you got a link. Lots of things look good on paper, but I always think from the point of how are you going to fit it

Only put about 1 minutes thought into this, could you put up steel track n stud wall and spray foam the back side against the granite fully filling to the face of the studs. Stud wall 70 mm, gap behind for wobbly granite 10-15 mm total 100mm with plasterboard so 88mm of closed cell spray foam. I really can’t think of anything you can use that will go that thin do you have to comply with building regs as I don’t know what the minimum would be for that.

On a more sensible note i take it you need the trailer for something else as you shouldn’t be mixing any sand and cement in this weather but you know that don’t you.

just an image to understand metal studs with insulation.

Think from a practical point, not an insulation point how will you build this, how long will the screws need to be to fix to the wall ? if the walls aren’t perfectly flat your battens will be all over the place and will need packing out to make level my thought would be to build an internal stud wall either in light steel track n stud or standard timber then insulation behind this and in between studs, leave a gap for services, fit a clever two way vapour membrane what ya think.

I normally put it in the microwave the bird indoors gets the ump with this, so I have my own in the garage now

You will need some careful details at the sole plate if you fit sips down onto a cold slab. Lots of planning to make them work properly without lots of cold bridges

You need to add a vapour control layer between the 40mm celotex and the batten this can be achieved many ways a vapour control membrane taped on with all joints taped and taped to walls or tape all joins in 40mm celotex with the aluminium tape and seal to walls. That second roof makeup is probably a million times better than the first with just a little bit of juggling.

IMHO that looks like a really stupid design so yo install bloody expensive insulation and then cut a hole in it for a light DUR. might as well leave the window open pull the 100mm celotex down and touch the 40 mm against it, then find a shallow light or increase the batten depth, how is she proposing to provide your airtight layer if your going to cut a sodding great hole in it. Sorry that’s rubbish. You can have the best insulation in the world, but if it’s leaky and gappy you might as well leave it out.

How deep are your rafters, as it said you must leave 25mm above celotex as for upgrading to 125 that’s something only you can decide, you need to weigh up cost versus benefit roof windows, triple glazed at the very least, fit the best you can afford as this will be a big heat loss area. As for fitting it’s no different then any other roof, rafters doubled up on each side, fit window fit celotex in between rafters fit celotex under rafters batten and plasterboard this will leave a slightly deeper looking reveal around the window due to the 40mm celotex and batten,

My planning cost me £14600 all in, about £4500 to the planning consultants in the grand scheme of life it was money well spent we built a model of the original, then added extensions that we could get under permitted development then built another model of the new proposed house we then asked for a site meeting the planning guy didn’t really have a lot to say and just said you had better stick an application in and we got it.

Well done, we went from 60m to 240m on a SSSI site took 16 months and a load of effort.

It sounds fairly straight forward do you have two types of roof, one standard with a cold loft area, the other with a vaulted section. You really need to show us a section drawing. In the standard cold loft area you will have 150mm of quilt between the joists and then 150mm laid at right angles across the top of the joists in the loft area. In your vaulted section you have 100mm of celotex in between the rafters ensureing you allow 25mm gap between the celotex and the membrane, then 40mm of celotex under the rafters. Does that make more sense or just as confusing. @wozza thinking about it, I bet you have a raised ceiling joist, that’s why you have the two different insulation types.

50m of 90mm mdpe £225 delivered.

It really bugs me when people comment on how much these tradesmen are charging how much do you lot earn a self employed bloke has to take every opportunity to earn as much as they possibly can. You need to step back and think of all the days they don’t earn anything not a penny wet days no work no pay chrismas holidays bank holidays the four weeks annual leave you all get no sick pay having to pay all your own pension contributions add that lot up and take it away from their daily charge and you will see that there is not a lot left £17 a metre for block work, how many m a day, take off tax,public liability insurance, tools, running a van,ppe in my time running my buisness i had a lot of young lads pass through my door, but today I would not encourage any of them to go self employed.

Scanda hause use an osb board that has holes drilled in it all over i have looked for it but it must be something they produce themselves.