insulation

  1. B

    PIR inbetween rafters in storage space, but should I block the vents?

    Hi all, I'm in the process of planning an upgrade to my loft insulation. I already have rockwool inbetween the joists in the ceiling/loft floor and I'm planning on adding another 250mm at 90 degrees, following guidence, and avoiding the loft ventilation areas. However I use this attic space to...
  2. C

    Insulating loft / condensation problem

    Hi all End of terrace built in 1890. Since topping up my insulation, I have a significant build up of condensation on the breather membrane in my loft that I’m trying to fix through: - installing lap vents in between every rafter at the lowest point close to the eaves. - installing a...
  3. S

    How to deal with this window reveal and insulate?

    I've recently had new double glazed uPVC windows installed, and since the old sash and case windows were so rotten they stripped out the whole frame with the rest of the windows. The old lime plaster on this wall basically fell off on its own after decades of damp/neglect by the previous...
  4. MeldrewsMate

    Installing underfloor heating throughout...

    Good afternoon all, as part of a major refurbishment of my dad's 90 m2 semi-detached bungalow I am considering ripping out the existing suspended wooden floors throughout (some of which will have needed re-packing anyway), adding insulation, UFH pipework, and screed. It seems simple enough as...
  5. C

    Condensation in loft after new insulation

    Hi all 1890s terraced house, laid some new insulation in the front half of the house last year, didn’t get round to doing the back half. Just been up there to find loads of condensation at the front pictures attached, non at the back. What do I need to do fix please? Bathroom is at the back and...
  6. JamieDIYs

    Lime constructed house with cavity wall… can you insulate

    Hi all, just wondering what people’s thoughts are on cavity wall insulation on a 1910’s built house constructed with lime mortar. I’ve read a couple of horror stories online about people installing modern cavity wall insulation into a period property which subsequently caused a multitude of damp...
  7. C

    How difficult to reduce thickness of 100mm Kingspan / Xtratherm

    I have a situation where 100mm insulation has been put on top of an unlevel concrete slab Insulatiin boards are 400mm wide. 19mm T&G and 12mm laminate flooring to go on top. Part of the floor will be too high, and I need to reduce the height. Prefer not to have to grind concrete down. How...
  8. Philipo51617

    Celotex in Loft/ Attic Floor

    Hi I've some Celotex 150mm insulation boards left from flat roof insulation project and looking to use in loft floor which has some old insulation in. Just checking that vapour barrier is still needed and that it is ok to lay as per below image, i.e. up and over the floor joists. The Celotex...
  9. T

    Insulating bay window upstairs and ceilings

    Hi This is my first post and a DIY job that is new to me so excuse me for any basic terms that I will use ( still in the learning process).After reading various posts regarding the same project I am undertaking I am well and truly confused. My 1950's house has bay windows, we are renovating...
  10. R

    Working with insulation board

    I am trying to build a box to go over my poorly insulated loft hatch. This is the box so far - 4 sides and a lid. The parts are loose at this stage. But I have some questions. 1. Can you suggest a glue to use to stick the 5 parts together? 2. After gluing, can I use expanding foam to fill the...
  11. N

    Insulating new shed floor (concrete base, 38mm bearers)

    I am buying a 5m x 3m shed and have a nice flat concrete slab to put it on. shed is pre fabricated and will be assembled on delivery. https://noahgardenrooms.co.uk/product/aspen/ I have requested damp proof course and 22mm t&g flooring. There is no option to insulate under the floor so am trying...
  12. Auric

    Are these joists too shallow for suspended floor insulation?

    Hi all I live in an 1880s victorian house with a suspended timber floor. The distance from the ground to the bottom of the joist is 20cm, the joists are 9cm deep, and the gap between joists is 32cm. The plan was to put down a permeable membrane and suspend Rockwool insulation between the...
  13. P

    Loft Insulation Sanity Check: Rockwool or foil? Ceiling or rafters?

    I think I've got myself confused between two discrete options for insulating our house, and could do with another opinion … I'm in a late 18th century terrace, 550-600mm stone walls with rubble infill and a pitched slate roof. It's a cold house, and I'm wanting to insulate it as best I can...
  14. 0

    Garage insulation - membrane around combi boiler

    I'm currently in the process of insulating my garage (cold roof). I'll be using a Moll Intello vapour control membrane after the insulation and before battens and plasterboard. The boiler is currently located on the brick wall and as such can't be wrapped (sealed) with the membrane. Is it...
  15. H

    Insulated plasterboard on an internal wall suffering from condensation

    Hi all. I've read conflicting things about how to do what I'd like to accomplish so thought I'd post my own question as everyone's circumstances are different so here goes. I live in an end-of-terrace circa 1906 property with cavity walls. Both internal and external walls are of red brick...
  16. A

    Is this Asbestos loose fill insulation?

    Due to expensive heating costs I decided to upgrade our loft insulation, its only half way through that I was made aware by a random google article about asbestos loft insulation. Now Im concerned it could be loose fill asbestos insulation. It's yellow and fluffy, see photo attached. Our home...
  17. W

    What's the regulation pipe insulation in an unheated loft space?

    As in the title - What's the required insulation under building regs for heating pipes in the unheated loft space within a residential building? I can't seem to find any clear-cut answers.
  18. M

    Insulating Wallpaper

    I want to put up insulating wallpaper on a staircase. I want it to not dent too easily and be easy to put up. What would you recommend?
  19. R

    How to raise level of loft boards?

    So I want to add insulation and then board over it - the joists are already 170mm deep so I only need another 100mm insulation. There’s not much headspace and loft legs are too long. I was thinking of running some timber around 125mm x 45mm across the existing joists which are 170mm x 45mm, so...
  20. L

    Roof repair and loft insulation

    Hi, I am struggling to understand my roofing contractor's quote and reasoning behind some of the work. The roof on our rear extension (extended by previous owner) is missing the edges in the bottom corners and it slipped over the years. We need to replace the old skylights, so we want to...
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