Build Daily


August 12, 2017 18:06

Thermal insulation on the outside of the foundation

For All buildings have to heat up to 1/5 of its foundation - a foundation.At the same time the owners of private houses often neglected basement insulation, especially if the basement in the building is not in use.And it is in vain - quality insulation on the outside of the foundation helps to reduce heat loss, reduce the humidity in the basement, to extend the service life of the foundation and walls.

Why foundation needed to insulate the outside?

Many believe it is easier to insulate the base from within, and this is a gross mistake.They insulate the basement of the low temperatures, but it does not eliminate the material from which made the foundation, from the damaging effects of water and cold: during absorb moisture foundation microcracks formed during freezing, which is gradually expanding, and sooner or later the foundation begins to crumble, loses strengthand reliability.

Insulation of the outside of the foundation can not only protect the lower part of the house from moisture, but also to protect themselves from the freezing of the foundation wall.wherein the dew point is shifted toward a heater, which is much more resistant to the harmful effects of moisture and low temperatures, than concrete.

Driving proper insulation on the outside of the foundation

Driving proper insulation on the outside of the foundation

basement insulation methods

There are several ways of warming the outside of the foundation: using gravel cap, with different sheets of insulation and polyurethane foam, sprayed on the surface of the cap.All methods have their advantages and disadvantages, limiting the scope of their application

For residential buildings is the most reliable and, moreover, easy to carrying out the method - insulation on the outside of the foundation polystyrene sheets.This material has several advantages:

  • strength and durability;
  • Resistance to moisture;
  • Easy mounting and installation;
  • Due to its high strength not damage rodents;
  • It is easy to decorating the outside;
  • material is easy to process, and the insulation of the foundation can be made with your own hands;
  • Due to the increased strength of polystyrene plates assume part of the load heaving soils.
  • price of polystyrene is readily available.

Insulation of the outside of the foundation polystyrene

Before any work necessary to make the calculations and determine the number and thickness of the polystyrene plates.. As a rule, enough for an average strip plates with a thickness of 5-8 cm In addition, you need the following tools and materials:

  • perforator with drill.borax Length - 15 cm, diameter - 10 mm;
  • Building mixer and concrete mixer;
  • Roll self-adhesive polymer-based waterproofing.You can use obmazochnuyu but without bitumen - component bituminous mastics destroy polystyrene;
  • primer on concrete;
  • Glue for assembly of polystyrene panels to the foundation;
  • Dowel head with a plate for fixing polystyrene plates;
  • Polyurethane foam;
  • reinforcing mesh;
  • cement-sand mortar;
  • gravel and coarse sand;
  • Facing materials and appropriate adhesive.

technology consists of several stages:

  1. When building a new house to the basement insulation begin immediately after its construction and paving slabs basement.If you plan to insulation already built home, the foundation must first dig around the perimeter of the width of not less than a meter.The depth of the trench must be such as to dig out the foundation to the core.
  2. walls of the basement should be dry, remove dirt, soil residues, dust and other contaminants.
  3. If the house stands on a plot with shallow groundwater - at the bottom of the trench is performed drainage: stacked layer of river sand and a geotextile fabric.On geotextile put a layer of gravel, the perforated pipe with a diameter of 10 cm, then poured gravel tube, wrapped with geotextile and covered with river sand on top.Such drainage wicks moisture away from the quality of the foundation walls.Pipes need to bring into the collecting sump arranged near the house.
  4. walls covered with primer cap Latex.Primer fills all pores and crack and provides good adhesion with the foundation waterproofing.
  5. Stack self-adhesive waterproofing proglazhivaya it hard roller over the entire surface.Additionally glued joints with sealant.
Thermal insulation on the outside of the foundation polystyrene

Insulation of the outside of the foundation polystyrene

  • on waterproofing polystyrene sheets are fixed with a special glue.Glue is applied to a sheet of intermittent stripe at the edges, retreating 1-2 cm, and a few points over the rest of the leaf area.
  • Apply a polystyrene plate to the prepared waterproofing layer and strongly pressed.Next similarly attached sheet lapped, with a compound of sheets produced with a special groove on their joints.
The process of laying polystyrene plates

process of laying polystyrene plates

  • If the foundation has a considerable height, and it takes a few rows of polystyrene plates - rows are placed in a staggered manner so as not to form large vertical joints.
  • After laying large gaps zapenivayut, shpaklyuyut adhesive or sealant is filled, so that no cold bridges.
Large gaps between the plates is filled with sealant or zapenivayut

large gap between the plates is filled with sealant or assembly foam zapenivayut

  • Attach polystyrene sheets to the base at ground level is not necessary, since the filling of soil podozhmet them to the foundation.
  • backfill produce coarse dry sand, the top layer - with the addition of gravel.Gravel cushion creates a base for warming soil.
  • above the soil level of the polystyrene plates are fixed to the foundation by means of special anchors with wide diaphragm cap.They are made of plastic and not create cold bridges.For mounting drill holes drilled in the insulation so that the depth of 5-7 cm in the concrete sign.Plugs hammer hammer.Each plate is attached to the 4-5 dowels.
Fixing polystyrene panels produced using dowels

Fixing polystyrene panels produced using dyupeley

  • to perform insulation finishing plaster adhesive for finishing works.To make the layer of plaster strength reinforcing mesh used for external work, putting it on the freshly applied plaster and smoothed so that the mesh surface is completely recessed in the solution.Dries plaster for 2-3 days.
  • Perform formwork under the blind area of ​​the planed boards, blind area width -. Not less than 60 cm below the blind area on the sand-gravel cushion for additional insulation polystyrene boards are placed, reinforcing mesh with a mesh size of 10 cm, then poured concrete formwork blind area.About the blind area around the house, please visit our website.
Decking blind area is filled with concrete

blind area formwork filled with concrete

  • After drying, the blind area can proceed to finish the foundation by any decorative materials.

Proper insulation of the basement from the outside not only the reliability and durability, but also gives the house finished and neat appearance and protects the walls from damage by ground swelling and provides a warm and dry cellar.

Also read about the insulation of the foundation with his own hands.