Matt Posted April 25, 2006 Share Posted April 25, 2006 The roof on my house is in reasonably good repair other than a broken,but supported beam. I want to convert the loft space into a room so my question is ,do I need to strip the roof in order to waterproof (ie:felt ) the roof or is there a product or way that would enable me to convert the the loft without stripping the tiles.Thanks in anticipation. Matt Link to comment Share on other sites More sharing options...
Stocky Posted April 26, 2006 Share Posted April 26, 2006 We have just had our loft converted two two bedrooms, bathroom and storeroom. we needede to have a support beam lifted metre. the only stripping of the roof was for replacement velux windows and two new dormers. With the conversion we did need to have five 'ventilation' tiles. With the change of the supports we did have to have a new metal cross support. No major tile stripping was undertaken. Link to comment Share on other sites More sharing options...
Matt Posted April 26, 2006 Author Share Posted April 26, 2006 Did you have felt under your tiles or could you see directly onto your tiles and the odd bit off daylight at certain angles? Link to comment Share on other sites More sharing options...
Nick Trollope Posted April 27, 2006 Share Posted April 27, 2006 I wouldn't use roofing felt. It is not "normal" in France. A properly built slate roof will not leak, and if it does, then felt ain't the answer (as you will need to remove the tiles anyway & you may as well just put them back properly!). Don't be tempted by any of the spray-on solutions - unless you are planning to sell to an idiot & leave! Link to comment Share on other sites More sharing options...
Matt Posted April 27, 2006 Author Share Posted April 27, 2006 NickIs it OK then to insulate and board straight under the tiles.They are clay tiles hung on tile battens and as far as I know there are no leaks.My concern was if the wind were to blow any rain under the tiles it would cause damp inside.Also ,would I use straight forward rockwool insulation or cellatex sheets? Thanks also for the advice on the spray on stuff as I must confess I was curious about it. Link to comment Share on other sites More sharing options...
Gluestick Posted April 27, 2006 Share Posted April 27, 2006 Is it hot in Spring-Summerwhere you are?If so, consider using ally sheet bonded combination insulation, as it can become awful in converted lofts!Even in the far North where we are, the loft becomes unbearable when the sun's out! Link to comment Share on other sites More sharing options...
andyh4 Posted April 28, 2006 Share Posted April 28, 2006 Make sure to leave an air gap between the tiles and your insualtion material. This way any damp that does occur has a chance to dry out through natural ventilation. Fail to do this and you get the same results as the spray on rubbish Nick warned about - ie rotten beams. Link to comment Share on other sites More sharing options...
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