Hi all,
1961 bungalow. Cavity wall insulation done in 2009 (that yellow bobbly stuff), attic insulation c.250mm, upvc double glazing (some from the 90s). A wall vent in one room blows in a draft from outside near ground level, trickle vents in two other rooms, and vents above sliding patio door in another. All vents open.
I have the heating programmed to come on three times a day for two hours each time, 7am to 9am, 12.30-14.30, 17.45-19.45.
RH is generally 58-60%, temperatures generally 18C-19.5C. Except if I have woodburner on then that room gets hotter with some effect on adjoining rooms.
I know all about good habits, like not drying clothes indoors, using bathroom and kitchen properly. No known leaks anywhere. I run a dehumidifier a few times a week for an hour or so.
I am getting condensation along the bottom inch or so of my bedroom window in the mornings even with trickle vent open. And there is some at the bottom of the massive, sliding metal door in the lounge - this thing is at least 30 years old and just seems to be a cold spot at the bottom. I have the vents open at the top. Otherwise, no obvious damp issues.
However, I would like to get RH to more like 50% average and am at the limits of what I can achieve.
Two options:
A) install a PIV. What should the cost be including installation? Loft or wall mounted better?
B) DIY option. Install a few more trickle vents, buy an extra dehumidifier, and have the two dehumidifiers running at both ends of the house for maybe an hour over night and an hour in the day using timed plugs to automate the process.
Both options presumably ventilate the house with clean air and reduce humidity. Option B more hassle.
Thoughts?
1961 bungalow. Cavity wall insulation done in 2009 (that yellow bobbly stuff), attic insulation c.250mm, upvc double glazing (some from the 90s). A wall vent in one room blows in a draft from outside near ground level, trickle vents in two other rooms, and vents above sliding patio door in another. All vents open.
I have the heating programmed to come on three times a day for two hours each time, 7am to 9am, 12.30-14.30, 17.45-19.45.
RH is generally 58-60%, temperatures generally 18C-19.5C. Except if I have woodburner on then that room gets hotter with some effect on adjoining rooms.
I know all about good habits, like not drying clothes indoors, using bathroom and kitchen properly. No known leaks anywhere. I run a dehumidifier a few times a week for an hour or so.
I am getting condensation along the bottom inch or so of my bedroom window in the mornings even with trickle vent open. And there is some at the bottom of the massive, sliding metal door in the lounge - this thing is at least 30 years old and just seems to be a cold spot at the bottom. I have the vents open at the top. Otherwise, no obvious damp issues.
However, I would like to get RH to more like 50% average and am at the limits of what I can achieve.
Two options:
A) install a PIV. What should the cost be including installation? Loft or wall mounted better?
B) DIY option. Install a few more trickle vents, buy an extra dehumidifier, and have the two dehumidifiers running at both ends of the house for maybe an hour over night and an hour in the day using timed plugs to automate the process.
Both options presumably ventilate the house with clean air and reduce humidity. Option B more hassle.
Thoughts?
