Russell griffiths Posted February 7, 2019 Share Posted February 7, 2019 Morning all it has been suggested to me that under my counter batten I fit a foam strip to protect against any water penetration around nail and screw fixing holes. Having found some eye watering products I wondered if anybody has used anything cheaper. Ta. Link to comment Share on other sites More sharing options...
scottishjohn Posted February 7, 2019 Share Posted February 7, 2019 (edited) If i was that worried i would use sealer under baton as I nailed , got to be cheaper and will seal for sure think your over thinking it - -water ,if there is any and its a sloping roof and a ventilated space , has to get all the way through your baton to even get close to a hole ? which is filled with a fixing and the membrane is under compression from baton . quite sure will work fine till your in the grave . my roof on present house has horizontal batons on top of tar paper ,as they did in the past i can see the plywood inside the roof from loft. not just nailed to trusses as they are big ones and well spaced can see nails coming through plywood sarking and no sign of corrosion --so must be no water getting through Edited February 7, 2019 by scottishjohn Link to comment Share on other sites More sharing options...
Big Jimbo Posted February 7, 2019 Share Posted February 7, 2019 What about a bit of quality DPM. the rubber squishy stuff. I would have thought that the rubber would re-seal itself around the nail. Link to comment Share on other sites More sharing options...
ProDave Posted February 7, 2019 Share Posted February 7, 2019 I assume the eye watering products you are talking about is Compriband or similar? Link to comment Share on other sites More sharing options...
Russell griffiths Posted February 7, 2019 Author Share Posted February 7, 2019 Just added up all my batten length and it looks like I would need 700m @£1.20 a m i think i will put a line of cheap pu adhesive under them. Can get boxes of 12 tubes for £3.30 a tube. Belt n braces I think. Probably over doing it, but I do intend being buried in the back garden when I go so don’t want to be looking at a leaky roof as I lay in my box. Link to comment Share on other sites More sharing options...
ProDave Posted February 7, 2019 Share Posted February 7, 2019 Who is telling you that you need this? My counter battens were just screwed down direct to the breathable membrane. This is not the air tightness layer so why do you think they need to be sealed? Link to comment Share on other sites More sharing options...
Mr Punter Posted February 7, 2019 Share Posted February 7, 2019 Are you using OSB sarking? If this is a normal tiled roof it should be good for 70 years. How old are you? PU is really messy. If you are concerned about battens coming loose use better fixings. Link to comment Share on other sites More sharing options...
scottishjohn Posted February 7, 2019 Share Posted February 7, 2019 (edited) 31 minutes ago, Russell griffiths said: Just added up all my batten length and it looks like I would need 700m @£1.20 a m i think i will put a line of cheap pu adhesive under them. Can get boxes of 12 tubes for £3.30 a tube. Belt n braces I think. Probably over doing it, but I do intend being buried in the back garden when I go so don’t want to be looking at a leaky roof as I lay in my box. 12tubes!!!! ---just wee squeak that all it will need -should not come out side of baton so you going to build an ICF crypt as well? .lol or is it a viking funeral Edited February 7, 2019 by scottishjohn Link to comment Share on other sites More sharing options...
Russell griffiths Posted February 7, 2019 Author Share Posted February 7, 2019 Not worried about battens coming loose @Mr Punter will all be screwed down. Roof is metal sheets with a 50mm breather gap @ProDave even with a breather gap I’m anticipating a bit of condensation on the back of the sheets, which will drip onto my membrane, so I’m trying to put the best most watertight membrane on I can, the Swiss manufacturers recommend a nail strip under the counter batten, it is probably over kill but I would kick myself for scrimping on a detail and then have problems i would rather leave out a fancy tap in the kitchen to build a better roof. Link to comment Share on other sites More sharing options...
scottishjohn Posted February 7, 2019 Share Posted February 7, 2019 19 minutes ago, Russell griffiths said: Not worried about battens coming loose @Mr Punter will all be screwed down. Roof is metal sheets with a 50mm breather gap @ProDave even with a breather gap I’m anticipating a bit of condensation on the back of the sheets, which will drip onto my membrane, so I’m trying to put the best most watertight membrane on I can, the Swiss manufacturers recommend a nail strip under the counter batten, it is probably over kill but I would kick myself for scrimping on a detail and then have problems i would rather leave out a fancy tap in the kitchen to build a better roof. here is a reasonable priced tape https://www.roofingsuperstore.co.uk/product/novia-double-sided-butyl-tape-30mm-x-30m.html If you want to tape it Link to comment Share on other sites More sharing options...
A_L Posted February 7, 2019 Share Posted February 7, 2019 2 hours ago, Russell griffiths said: think i will put a line of cheap pu adhesive under them. Can get boxes of 12 tubes for £3.30 a tube. AC50 12 for £22.90 inc vat https://www.sealantsandtoolsdirect.co.uk/silicones_and_sealants/intumescent_fire_and_acoustic_sealants/everbuild_everflex_ac50_acoustic_sealant_adhesive_c4_380ml_box_12_P23506.html Link to comment Share on other sites More sharing options...
Russell griffiths Posted February 7, 2019 Author Share Posted February 7, 2019 Top banana @A_L have not seen that site before. Link to comment Share on other sites More sharing options...
Big Neil Posted February 7, 2019 Share Posted February 7, 2019 Just a thought, but as it's a belt and braces approach and anything you use will be under the roof covering anyway, how about the tapes/liquids used for tanking wetrooms? Link to comment Share on other sites More sharing options...
Russell griffiths Posted February 7, 2019 Author Share Posted February 7, 2019 23 minutes ago, Big Neil said: Just a thought, but as it's a belt and braces approach and anything you use will be under the roof covering anyway, how about the tapes/liquids used for tanking wetrooms? They do a purpose made rubber strip I just don’t want to spend £900 on it. Link to comment Share on other sites More sharing options...
Cpd Posted February 7, 2019 Share Posted February 7, 2019 1 hour ago, A_L said: AC50 12 for £22.90 inc vat Great stuff for what it’s designed for, I have used a lot of this round all my plasterboard joints and all wall and ceiling joints but I don’t think it would be good for this job, it sets a bit ridged - yes it’s “permanently flexible” but you want something more rubbery in texture I think...... a silicon like ct1 in texture but cheep as chips. I got a bunch of this stuff for nothing as it was out of date and it’s been great for putting between wood joints to act as an air seal. Again this is not made for this but it does stay really rubbery / flexible. Link to comment Share on other sites More sharing options...
A_L Posted February 7, 2019 Share Posted February 7, 2019 4 hours ago, Cpd said: yes it’s “permanently flexible” but you want something more rubbery in texture I think...... a silicon like ct1 in texture but cheep as chips how about this then http://www.caravan-components.co.uk/Caravan-Sealant-Mastic-IDL99-Cream-in-400ml-Tube Link to comment Share on other sites More sharing options...
Cpd Posted February 7, 2019 Share Posted February 7, 2019 Looks great I want some ! 8 minutes ago, A_L said: how about this then Link to comment Share on other sites More sharing options...
scottishjohn Posted February 7, 2019 Share Posted February 7, 2019 21 minutes ago, A_L said: how about this then http://www.caravan-components.co.uk/Caravan-Sealant-Mastic-IDL99-Cream-in-400ml-Tube not sure it will stay flexible for 30years caravns tend to leak as they get old -better with simple pu sealer/adhesive Link to comment Share on other sites More sharing options...
Onoff Posted February 7, 2019 Share Posted February 7, 2019 4 hours ago, Cpd said: I got a bunch of this stuff for nothing as it was out of date and it’s been great for putting between wood joints to act as an air seal. I had the opportunity to get hold of some out of date Dow stuff but never bothered. Was told it won't set? Link to comment Share on other sites More sharing options...
nod Posted February 7, 2019 Share Posted February 7, 2019 10 hours ago, Russell griffiths said: Morning all it has been suggested to me that under my counter batten I fit a foam strip to protect against any water penetration around nail and screw fixing holes. Having found some eye watering products I wondered if anybody has used anything cheaper. Ta. I think that would be overkill Russ If you look at some of the old houses that have stayed dry for decades Without felt or membranes Most of the roofs on here would probably be fine without slates or tiles Link to comment Share on other sites More sharing options...
nickw Posted February 8, 2019 Share Posted February 8, 2019 Ive used automotive double side foam tape for years, once on its waterproof and something like this could work as a nailing strip plus reasonable in 50 meter lengths. Used to get it from tapes direct , looks like they have changed/sold/bust , so found this supplier. The width I've used was 50 or 60mm but haves seen lots of different widths. https://www.psasolutions.uk.com/product/19mm-x-50-metre-automotive-double-sided-polyethylene-foam-tape 1 Link to comment Share on other sites More sharing options...
Russell griffiths Posted February 8, 2019 Author Share Posted February 8, 2019 12 minutes ago, nickw said: Ive used automotive double side foam tape for years, once on its waterproof and something like this could work as a nailing strip plus reasonable in 50 meter lengths. Used to get it from tapes direct , looks like they have changed/sold/bust , so found this supplier. The width I've used was 50 or 60mm but haves seen lots of different widths. https://www.psasolutions.uk.com/product/19mm-x-50-metre-automotive-double-sided-polyethylene-foam-tape That’s a better price. ?? Link to comment Share on other sites More sharing options...
nickw Posted February 8, 2019 Share Posted February 8, 2019 yup ? Link to comment Share on other sites More sharing options...
nickw Posted February 8, 2019 Share Posted February 8, 2019 It's what I was going to use for belt and braces approach if I do battens. Link to comment Share on other sites More sharing options...
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