Loft insulation in East Boldre

Start with what is there. Most lofts in East Boldre have something in them and almost none have enough. It has settled and compressed under forty years and anybody who knelt on it, it is patchy across the middle and missing at the edges, and there are gaps where cables and pipes come through.

Dry and in one piece it stays, and the new layer goes over it. Damp, black underneath or contaminated with droppings, it comes out, gets bagged at the hatch and leaves with us.

What we lay. Mineral wool covers most of it, usually a glass wool roll, sometimes a rockwool batt, and on irregular joists it gets cut to the bay rather than forced in. Loose fill, blown or poured, suits a ceiling that will not take a roll. Sheep wool if you prefer it. Where headroom runs out, PIR rigid board cut tight and taped, and in the shallowest corners a multi-foil quilt.

Two layers, and the second crossways. One layer laid flush between the joists is where most East Boldre lofts stop, and it leaves every timber acting as a cold bridge through the ceiling. The first layer goes between the joists. The second is cross laid at right angles, covering the joists as well as the bays, and around 270mm all in puts a ceiling where the Part L U value expects it to be. Finished, there should be no joist tops showing anywhere.

The eaves decide whether it works. The material runs to the wall plate and halts and the air path past it stays open, with a vent tray in each rafter bay to keep the air gap so the roof can cross ventilate from one wall plate to the other. Push wool into the eaves and the vapour that used to leave the space condenses under cold felt instead. The dew point moves into the layer, interstitial condensation forms where nobody can see it, and you end up with damp wool and black mould right across the rafters. Approved Document F sets the ventilation standard, and where the eaves cannot be opened a ridge vent is often the honest answer. A breathable membrane changes the detail, not the principle.

Services, hatch and rafter level. Rated covers go over the recessed lights so nothing sits against a hot fitting, and cables are lifted onto the top of the new depth, since buried wiring runs hot. A cold water tank and every pipe serving it now sit in cold air, so on goes the lagging. A board goes on the back of the hatch and a seal round the opening against draughts. Where there is no loft floor to work on, a room in roof gets its insulation at rafter level in a warm roof build up, with the sloping ceiling and any dormer cheek carried through as one continuous layer.

The way up comes first. A small trapdoor in a single storey cottage in East Boldre, bedrooms in the roof of a chalet, and a hatch above a stairwell make for three different mornings. Access is work at height and is planned as such.

What comes out. Old material has to be lifted, bagged and taken away before anything new goes down, and a loft full of boxes has to be emptied and refilled.

The shape of the roof. Open joists are quick. A trussed roof full of bracing, or a room in the roof where the insulation goes into slopes and small voids, is slower and fiddlier.

Eaves and fittings. The insulation stops at the wall plate to keep the eaves open, downlighters are boxed over and anything left in the cold is lagged. Approved Document L sets the depth to aim for.

Storage. If you keep things up there, raised boarding keeps the full depth under it, and it is priced as its own item.

Ask any other installer the depth and number of layers, whether old material is removed, whether the eaves stay clear, what happens to your storage, and whether the hatch and pipework are included.

Everything we do on a loft floor here is invisible from the lane, so the designation over this village has nothing to say about it. Depth, material, boarding, a sealed hatch, lagging on the pipework: none of it is development and none of it needs consent. If anybody tells you the National Park stops you insulating, ask which part of the designation they mean.

The line moves the moment you want to live in the space rather than store things in it. A loft conversion adds rooflights or a dormer, and inside the National Park permitted development rights are drawn more tightly than they are a few miles away, so a dormer that would be waved through elsewhere is a planning application here. The same applies to a run of vent tiles or an over fascia vent if the honest fix for a roof that cannot breathe is to open it up. Our advice is to keep the two apart. Get the loft floor to full depth now, because it is cheap, quick and nobody's decision but yours, and treat anything that changes the outside of the roof as its own separate question.

Our Boscombe base is 16.7 miles away, and we insulate lofts in East Boldre, Pilley, Boldre, Portmore, Norleywood and on the Lymington side of the forest. Planning is handled by the National Park Authority, building control by New Forest District Council.

Bournemouth Roofing & Building Ltd is the company, registered in England and Wales, company number 15471719. Its owner, Thomas Hannen, goes up into your loft to price it himself. A verified customer's Checkatrade review gives us 10 out of 10. The survey visit is free, and so is the itemised written quote. Before you book a visit in East Boldre, you can read our customers' Google reviews, word for word, on our reviews page.

Most repairs in East Boldre need no application at all. What decides whether a change to the outside of your house does is who the council is, whether a conservation area or a listing applies, and whether the place sits in a protected landscape.