I'm guessing not, when [url= http://www.screwfix.com/p/ronseal-brushable-one-coat-fencelife-forest-green-9ltr/73269 ]Ronseal[/url] is about £1 per litre and [url= http://www.screwfix.com/p/cuprinol-5-star-wood-treatment-5ltr/69133 ]Cuprinol[/url] is about £7 per litre.
I'm starting on the roof on my bungalow.
It's going to be a pitched felt roof on top of T&G boards.
The boards shouldn't ever get wet, but I'd like to be prepared in case they ever do.
What's the best stuff to paint them with first ?
Use Wbp ply instead.
As above use Water and boil proof ply wbp, or even bitumen faced osb, from Wickes, it does make a mess of your tools cutting it though and wear leather gloves as it has sharp edges.
Ronseal is water based emulsion type stuff, cuprinol is oil based and soaks in better.Other brands are available look for ones at you wash the brushes in turps not water.
I use stuff I get from a wood yard - not sure what it is but is smells and is harmful, but it is £12 for a 5 litre tin. It's probably oil based, but is clear. You can soak the wood in it, or paint it on. Seems like good stuff (the wood I have treated has not rotted since the start of last summer when the rain started).
If I use WBP ply, is it best to use two thinner sheets with staggered joints, rather than one thick sheet, to prevent movement and possible tearing of the felt at the join ?
I'm thinking maybe 2x12mm instead of 1x19mm.
I'm searching, but I can't find a beginners guide to building a pitched felt roof anywhere.
Regarding timber in roofs, ventilation is better than preservatives for ensuring the wood doesn't rot. Plenty of Victorian joists still rot free after 100+ years and no preservatives used at all....
I'd suggest Pressure Treated T&G Boards.
WBP ply really should be sealed for exterior use (OK, you're putting it under felt so maybe not so important but I'd be wanting the roof space well ventilated using ply).
Pitched felted roof is unusual on these islands so not surprised you can't find much info..
MidlandTrailquestsGraham - MemberI'm searching, but I can't find a beginners guide to building a pitched felt roof anywhere.
Look on this website for technical info;
[url= http://www.trada.co.uk/techinfo/library/search?for=felt+roof&where=products&exact=0 ]Trada[/url]
Pitched felted roof is unusual on these islands
Yes, it's common on sheds, but not for residential buildings.
I live in a wooden bungalow that was originally built as a holiday home. There's a lot of them around the Wyre Forest and up the Severn Valley.
I think I've made a mistake. 😳
I phoned round to get a few prices for WBP ply and one place was about £5 a sheet cheaper than anywhere else, so I went there and bought 10 sheets.
I didn't realise until too late that it is only softwood with WBP glue.
The guy assured me that all the local roofers use it, so it's OK, but I'm not so sure, I think I'd rather have the proper hardwood ply.
The dilemma now is to either use it and hope it lasts OK, or buy hardwood WBP ply and save this softwood stuff for internal use, even though £200 worth of 18mm ply is a bit of overkill for internal walls.
If i were you i'd over engineer it, some pics might be nice seeing as how i was glued to your previous foundation building exploits 😛
Softwood WBP plywood will be fine. Just make sure it exterior quality and marked as such. Hardwood plywood is more for finishing, specialist detailing and architectural "fluff".
Having said that though I prefer marine plywood (hardwood veneers) for durability and quality. Unfortuantly its generally not strength graded so unable to specifiy it for load bearing applications. Pity.
