Double-glazing film - any use?

In our previous house we fitted Perspex sheets on magnetic strips over single-glazed windows that we then removed and set aside so we could open the windows in the summer. Thought I would try the same thing on one window that we never open in an unheated small room using Stormguard ‘Double Glazing Film’ (purchased from Homebase). Easy to fit and the room feels warmer but sadly my MIN MAX thermometer does not record any significant increase in the room’s temperature. Fitted some of the film also on the single-glazed panel above the inner front door, and over the back door. Cost – about £10.

The loft is finished

Finally finished the insulation in the loft, having removed as much of the flooring as I could to roll additional insulation under that, and in some cases building a new floor on 50mm battens above the existing joists so that I could fit a proper depth of insulation under it. Also had to get as much insulation and draught-proofing as I could on the hatch into the loft.

Cold air comes down chimneys

We have an open fire in the sitting room and dining room on the ground floor. Of course the cold air comes down both of these when they are not in use which of course is most of the time. Made a timber cover for the sitting-room one – not a perfect seal but cuts out much of the draft and, painted black, is hardly noticed.

What is the temperature in here?

Bought an additional MIN MAX thermometer to keep inside the house to measure the temperature in different parts of the house, see what effect different boiler settings might have at different times of day in different parts of the house, and see if I could measure any good effects of all this work. Began a daily log of outside MIN MAX and inside MIN MAX, moving the inside one around to different parts of the house.