ventilation

  1. T

    Pitched to flat roof ridge ventilation - how to do it?

    Hi all, Really hoping you can help with a problem with the roof of my newly converted loft. I had a torrid time with the build (over budget, overran, had to do loads myself) but it has been generally finished and has been signed off by building control. The loft conversion is a full width flat...
  2. R

    Wet Rafters

    Hi all, I'm looking for some opinions on the cause of some wet rafters in the attic. The rafters to the rear (north facing) elevation are all wet on top and down the sides. The rafters on the front (south facing) elevation look to be okay. I'm trying to work out if the likely cause is a roof...
  3. D

    Extractor fan and ventilation queries

    Hi all, Have put this here rather than electrics as also looking for general advice on ventilation and reducing condensation, etc. Currently converting a block outbuilding into a utility room to house washer/tumble dryer/chest freezer/garden sink with only cold tap. The shed in its current...
  4. 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...
  5. L

    Excessive condensation

    Hi all We live in a semi detached Edwardian property with two large bay windows in the master bedroom and lounge. In the master, no matter what we do we seem to get excessive condensation each morning. We have tried a dehumidifier (didn’t work) so am at a bit of a loss to what we could do. We...
  6. S

    Chimney Ventillation

    Hello The chimney breast and hearth have been removed on the ground floor. The chimney breast and hearth remain on the first floor, and the chimney breast goes up into the attic and onto the chimney outside. The chimney pots have been capped and have ventilation points. However there is no...
  7. L

    PIV or humidity fan?

    Hi guys I have an issue in my kitchen that a surveyor says is a failure in my damp proofing & my damp man says is only moisture. Its in one corner of my kitchen and 3 sets of solid oak worktops have bowed. Its now starting to make my metal fireplace in the adjacent room go a little rusty. Its...
  8. C

    Coal Chute Cover for Ventilation

    I have a Victorian property with a basement that is becoming damper over time. One easy fix is to add more ventilation through our coal Chute. Currently, the chute is covered by a square metal cover that can be lifted off the hole in the ground just outside our kitchen window to access the...
  9. R

    Roof Ventilation - roof with no soffits or fascias - how many roof vents?

    Hi there, I'm hoping someone can help advise. I've had two roofers out to look at my attic space, as there is inadequate ventilation in the ceiling void and therefore we've had issues with condensation collecting on the roof felt in winter and it being extremely hot in the summer. Both...
  10. S

    Brick store ventilation and moisture control

    I have a brick garden store, approx 4’ x 10’ that is very damp; I had the roof replaced a while ago, so it’s penetrating rather than leaking. There is currently no ventilation. I’m thinking I probably need to install air bricks at either end to get a through flow of air, but have read...
  11. B

    underground ventilation

    Hi all I have terrible damp and fungus growth under the wood floor on the ground floor of our typical victorian terraced house. We had a new patio door put in and this has removed the air bricks. Only now do we realise the error of this. So before I go about replacing all the joists and boards...
  12. M

    Help required for flat ventilation

    Hi All, I am currently having my bathroom refurbished. It is an ex council block of flats. The vent already in place appears to be a cover so not sure how this is meant to work i.e. extract steam. Also noticed that no other flat on the block appears to have an electric extractor fan. Can I...
  13. W

    Ventilation ideas for loft

    Hi there. I'm looking for some advice related to an issue with our loft if that's ok. Our house is around 300 years old with the original stone roof (not listed). It has two loft cavities with an exterior wall running through the centre of the house. Since moving in 3 years ago we have done...
  14. R

    venting soil stack through a wall?

    I have a soil stack in my attic that I discovered is open. I fitted a Durgo AAV but this caused gases to build up and leak out from the bath p trap. I took the Durgo off and the smell stopped. So I'm thinking I need to vent the soil stack externally. My roof is asymmetrical, it rises to the top...
  15. M

    Over Fascia Vents - Too Much Airflow in loft?

    Hi Everyone, We have recently had a new slate roof installed and, at our request, we asked for over fascia vents to be fitted around the entire perimeter of our four-sided hipped roof (which measures about 13m wide by 10m deep). We asked for this form of ventilation as we thought it was the...
  16. R

    How to replace a kitchen hood duct

    My 350m3/h cooker hood is 4.5m from the exterior wall, and is currently connected to an exterior vent with 100mm aluminium ducting inside a bulkhead. I'd like to have better extraction, 500m3/h or more, and it seems like I need 150mm duct for higher powered hoods. Unfortuately the floor has been...
  17. B

    Soffit ventilation causing strong draughts inside

    We have recently fitted soffits with 80mm vent grilles every 2metres on our recently converted cob barn. in the double height interior space we can feel a strong draught where previously there was none, the draught is coming from high up, the cob walls are 6m high. This draught wasn't here last...
  18. M

    Vent axia PIV unit plug

    Hi, iv recently bought a vent axia piv unit. Iv noticed there is a space on the unit where a plug goes possibly for controls. The problem is I cant find any controls for it online, I wondered if there was anyone who could point me in the right direction, or if its not for a controller then...
  19. M

    Ventilation, chimney breast, internal wall insulation, air vent

    I want to ventilate a room that has had internal wall insulation applied to it, and the chimney is not ventilated. I was thinking of putting an air vent into the room (where old opening was) but they look a bit unsightly and was thinking it will allow cold air in, or will the hot air leaving...
  20. R

    Ventilation - poly-carb covered lean-to with UPVC door

    I (think I am) looking for advice about ventilation! We have recently (2 weeks ago) replaced an old glass lean-to roof with a poly-carb equivalent. We have also replaced the UPVC door. We have already noticed a significant amount of condensation on the underside of the poly-carb roof. My...
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